{"id":10203,"date":"2022-03-29T14:59:05","date_gmt":"2022-03-29T18:59:05","guid":{"rendered":"https:\/\/organicfederation.ca\/?post_type=docs&#038;p=10203"},"modified":"2022-03-29T14:59:05","modified_gmt":"2022-03-29T18:59:05","password":"","slug":"economie-vs-environnement-compromis-dans-la-gestion-des-elements-nutritifs-en-production-de-legumes-biologiques","status":"publish","type":"docs","link":"https:\/\/organicfederation.ca\/fr\/ressource\/la-science-du-bio-au-canada-printemps-2022\/economie-vs-environnement-compromis-dans-la-gestion-des-elements-nutritifs-en-production-de-legumes-biologiques\/","title":{"rendered":"\u00c9conomie vs environnement : compromis dans la gestion des \u00e9l\u00e9ments nutritifs en production de l\u00e9gumes biologiques"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"10203\" class=\"elementor elementor-10203 elementor-10015\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"docs\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-463dbc8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"463dbc8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-92633ca\" data-id=\"92633ca\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7d33f35 elementor-widget elementor-widget-text-editor\" data-id=\"7d33f35\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Par Sean Smukler<br \/><\/strong><em><span class=\"TextRun SCXW167495458 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW167495458 BCX0\">Faculty of Land and Food Systems<\/span><\/span><span class=\"TextRun SCXW167495458 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW167495458 BCX0\">, <\/span><\/span><span class=\"TextRun SCXW167495458 BCX0\" lang=\"EN-CA\" xml:lang=\"EN-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW167495458 BCX0\">Universit\u00e9<\/span><span class=\"NormalTextRun SCXW167495458 BCX0\"> de la <\/span><span class=\"NormalTextRun SCXW167495458 BCX0\">Colombie-Britannique<\/span><\/span><\/em><\/p><p><strong>Objectifs \u00e9conomiques et environnementaux\u202f: les producteurs biologiques peuvent-ils cocher les deux cases en mati\u00e8re de gestion des \u00e9l\u00e9ments nutritifs? Un approvisionnement trop faible en \u00e9l\u00e9ments nutritifs peut entra\u00eener une r\u00e9duction des rendements et des revenus. La gestion des \u00e9l\u00e9ments nutritifs est l\u2019une des principales raisons pour lesquelles les fermes biologiques, en particulier les fermes mara\u00eech\u00e8res, ont des rendements inf\u00e9rieurs \u00e0 ceux des fermes conventionnelles. Parall\u00e8lement, l\u2019application d\u2019azote (N) et de phosphore (P) au-dessus de ce que la culture peut utiliser peut entra\u00eener le lessivage des \u00e9l\u00e9ments nutritifs et le ruissellement dans les cours d\u2019eau, contribuer \u00e0 la mauvaise qualit\u00e9 de l\u2019air et \u00e0 l\u2019\u00e9mission\u00a0 des gaz \u00e0 effets de serre responsables des changements climatiques. La gestion de ce compromis est difficile car les r\u00e9sultats peuvent varier consid\u00e9rablement en fonction des types d\u2019amendements auxquels les producteurs ont acc\u00e8s, du climat et des conditions du sol.\u00a0\u00a0<\/strong><\/p><p><span data-contrast=\"auto\">Il ne s\u2019agit pas de\u00a0 simplement ajouter du compost aux l\u00e9gumes chaque ann\u00e9e. Il est important de conna\u00eetre la quantit\u00e9 d\u2019azote et de phosphore requise (et celle qui sera retir\u00e9e du sol par la culture) et la teneur en azote et en phosphore contenue dans un amendement. Nous avons con\u00e7u une strat\u00e9gie prometteuse (<\/span><i><span data-contrast=\"auto\">Faible Compost + N<\/span><\/i><span data-contrast=\"auto\">) qui permet aux producteurs un \u00e9quilibre entre de bons rendements et la protection de l\u2019environnement.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cb6fd72 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cb6fd72\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8fb149c\" data-id=\"8fb149c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-da7170f elementor-widget elementor-widget-heading\" data-id=\"da7170f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">La complexit\u00e9 du probl\u00e8me <\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b68b2d elementor-widget elementor-widget-text-editor\" data-id=\"2b68b2d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-contrast=\"auto\">Il y a souvent un d\u00e9calage entre le ratio azote\/phosphore dont la culture a besoin et le ratio du compost ou du fumier. Par exemple, le ratio azote\/phosphore id\u00e9al pour la pomme de terre est de 6\/1 et de 7\/6 pour l\u2019\u00e9pinard. Cependant, les ratios azote\/phosphore provenant des fumiers et du compost peuvent \u00eatre aussi bas que 1\/3 et 0\/6, respectivement. Le r\u00e9sultat de cette inad\u00e9quation est qu&rsquo;au fil du temps, les agriculteurs qui appliquent du compost ou du fumier pour r\u00e9pondre aux besoins en azote de leurs cultures accumulent du P dans le sol, \u00e0 un niveau qui pourrait d\u00e9passer les niveaux salubres pour l&rsquo;environnement.\u00a0 De plus, la quantit\u00e9 totale d&rsquo;azote pr\u00e9sente dans les amendements se min\u00e9ralise en azote assimilable par les plantes \u00e0 des taux variables. Par exemple, des incubations en laboratoire de fumier de volaille compost\u00e9 ont d\u00e9montr\u00e9 que la quantit\u00e9 totale d\u2019azote min\u00e9ralis\u00e9 au cours d\u2019une saison peut varier de 3 \u00e0 37 %.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">Les taux de min\u00e9ralisation sont largement d\u00e9termin\u00e9s par le rapport carbone\/azote (C\/N) des amendements, mais aussi par le type de sol, la temp\u00e9rature et l\u2019humidit\u00e9. Pour harmoniser avec pr\u00e9cision l\u2019apport en \u00e9l\u00e9ments nutritifs et les besoins des cultures, il faut donc non seulement conna\u00eetre la teneur en azote et en phosphore des amendements, mais aussi estimer la quantit\u00e9 susceptible d\u2019\u00eatre min\u00e9ralis\u00e9e pendant la saison de production. <\/span><span data-contrast=\"auto\">Gr\u00e2ce \u00e0 ces informations, les producteurs peuvent utiliser des engrais autoris\u00e9s pour compenser tout d\u00e9s\u00e9quilibre dans le rapport N\/P.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">Id\u00e9alement, une grande partie de l\u2019azote et du phosphore appliqu\u00e9s \u00e0 un champ proviendrait du recyclage d\u2019\u00e9l\u00e9ments nutritifs des cultures de couverture cultiv\u00e9es en hiver. L\u2019azote pourrait aussi \u00eatre ajout\u00e9 au syst\u00e8me \u00e0 l\u2019aide de cultures fixatrices d\u2019azote (plut\u00f4t que par l\u2019ajout d\u2019amendements). Cependant, le recours aux cultures de couverture n\u2019est pas toujours efficace en Colombie-Britannique. Les producteurs disposent d\u2019une courte p\u00e9riode pour les \u00e9tablir, les hivers froids limitent la fixation de l\u2019azote et la production de biomasse, et les oiseaux migrateurs peuvent compl\u00e8tement d\u00e9truire les cultures de couverture.\u00a0\u00a0\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">Enfin, le co\u00fbt du compost, du fumier et des engrais biologiques varie consid\u00e9rablement en fonction de leur disponibilit\u00e9 r\u00e9gionale. Cette multitude de facteurs signifie que la gestion efficace des \u00e9l\u00e9ments nutritifs est une t\u00e2che complexe et que les meilleures solutions varient consid\u00e9rablement d\u2019une r\u00e9gion \u00e0 l\u2019autre.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e21cf0 elementor-widget elementor-widget-image\" data-id=\"6e21cf0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"1023\" src=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Photo-1-e1648065555533-768x1023.jpg\" class=\"attachment-medium_large size-medium_large wp-image-10017\" alt=\"\" srcset=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Photo-1-e1648065555533-768x1023.jpg 768w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Photo-1-e1648065555533-225x300.jpg 225w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Photo-1-e1648065555533.jpg 866w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">\u00c9tablissement des parcelles \u00e0 Greenfire farm sur l\u2019\u00eele de Vancouver, Colombie-Britannique (photo soumise) <\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-44b5656 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"44b5656\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-247ac97\" data-id=\"247ac97\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e0c8150 elementor-widget elementor-widget-heading\" data-id=\"e0c8150\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Mesurer les compromis par des exp\u00e9riences contr\u00f4l\u00e9es <\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6d1da35 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6d1da35\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-af88384\" data-id=\"af88384\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-727ab56 elementor-widget elementor-widget-text-editor\" data-id=\"727ab56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"TextRun SCXW226915861 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW226915861 BCX0\">Pour \u00e9<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">valuer<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> les r\u00e9sultats \u00e9conomiques et environnementaux des strat\u00e9gies de gestion des \u00e9l\u00e9ments nutritifs dans les fermes mara\u00eech\u00e8res biologiques en Colombie-Britannique, le <\/span><\/span><span class=\"TextRun SCXW226915861 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW226915861 BCX0\">Sustainable Agricultural <\/span><span class=\"NormalTextRun SpellingErrorV2 SCXW226915861 BCX0\">Landscapes<\/span> <span class=\"NormalTextRun SpellingErrorV2 SCXW226915861 BCX0\">Lab<\/span><\/span><span class=\"TextRun SCXW226915861 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW226915861 BCX0\"> de l\u2019Universit\u00e9 de la Colombie-Britannique (UBC) a lanc\u00e9 une \u00e9tude avec le soutien d<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">e<\/span> <span class=\"NormalTextRun SCXW226915861 BCX0\">la Grappe Scientifique Biologique 3<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> en 2018.<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> La <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">Dr<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">e<\/span> <span class=\"NormalTextRun SCXW226915861 BCX0\">Kira<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> Borden, boursi\u00e8re postdoctorale, a dirig<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">\u00e9<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> l\u2019\u00e9tablissement d\u2019une exp\u00e9rience contr\u00f4l\u00e9e sur deux fermes en activit\u00e9 (\u00ab\u202ffermes m\u00e8res\u202f\u00bb) qui <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">avaient<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> des historiques de gestion et des sols <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">diff\u00e9rents<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">. <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">La ferme de l<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">\u2019<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">UBC dans la <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">vall\u00e9e<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> du Fraser <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">a<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> des sols <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">\u00e0<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> texture <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">grossi\u00e8re<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> et <\/span><span class=\"NormalTextRun SpellingErrorV2 SCXW226915861 BCX0\">Greenfire<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> Farm, sur l\u2019<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">\u00ee<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">le de Vancouver, <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">a<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> des sols <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">\u00e0<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> texture fine. Sur chaque site, quatre traitements ont \u00e9t\u00e9 <\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">\u00e9tablis<\/span> <span class=\"NormalTextRun SCXW226915861 BCX0\">sur des parcelles r\u00e9pliqu\u00e9es<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\"> (Tableau 1)<\/span><span class=\"NormalTextRun SCXW226915861 BCX0\">.<\/span> <span class=\"NormalTextRun SCXW226915861 BCX0\">Les pommes de terre ont \u00e9t\u00e9 cultiv\u00e9es la premi\u00e8re ann\u00e9e et le chou et le chou-fleur la deuxi\u00e8me ann\u00e9e.<\/span><\/span><span class=\"EOP SCXW226915861 BCX0\" data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p><p><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">D<\/span><\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">es rendement<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">s<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> plus importants (rendement par rapport au <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">t\u00e9moin<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">) <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">ont \u00e9t\u00e9 observ\u00e9s <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">pour les pommes de terre sous <\/span><\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">C<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">ompost <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">\u00c9<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">lev\u00e9<\/span><\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\"> par<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> rapport \u00e0 <\/span><\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">Faible <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">C<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">ompost + N<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">,<\/span> <\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">mais aucune diff\u00e9rence <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">n\u2019a \u00e9t\u00e9 observ\u00e9e <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">entre les strat\u00e9gies de gestion des \u00e9l\u00e9ments nutritifs pour les <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">brassicac<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">\u00e9es<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">.<\/span><\/span> <span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">Les gains <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">en<\/span> <span class=\"NormalTextRun SCXW212498194 BCX0\">rendement des pommes de terre ont \u00e9t\u00e9 plus prononc\u00e9s \u00e0 <\/span><span class=\"NormalTextRun SpellingErrorV2 SCXW212498194 BCX0\">Greenfire<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> Farm qu\u2019\u00e0 <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">la ferme de l\u2019UBC<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">. <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">Nous avons <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">aussi<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> observ<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">\u00e9<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> une utilisation plus efficace de l\u2019azote avec le traitement <\/span><\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">Faible <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">C<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">ompost + N<\/span><\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">, <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">la culture ayant <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">r\u00e9cup\u00e9r<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">\u00e9<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> (<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">assimil\u00e9<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">) d<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">e <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">20<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">%<\/span> <span class=\"NormalTextRun SCXW212498194 BCX0\">\u00e0<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> 100% de l\u2019azote appliqu<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">\u00e9<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">, tandis que moins de 20% de l\u2019azote a \u00e9t\u00e9 <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">r\u00e9cup\u00e9r\u00e9<\/span> <span class=\"NormalTextRun SCXW212498194 BCX0\">dans les parcelles de<\/span> <\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">Compost <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">\u00c9<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">lev\u00e9<\/span><\/span><span class=\"TextRun SCXW212498194 BCX0\" lang=\"FR\" xml:lang=\"FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW212498194 BCX0\">.<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> Cette tendance s\u2019est refl\u00e9t\u00e9e pour la r\u00e9cup\u00e9ration du phosphore <\/span><span class=\"NormalTextRun SCXW212498194 BCX0\">\u00e0<\/span><span class=\"NormalTextRun SCXW212498194 BCX0\"> la ferme de l\u2019UBC, mais avec des exceptions sp\u00e9cifiques aux cultures.\u00a0<\/span><\/span><span class=\"EOP SCXW212498194 BCX0\" data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p><p><strong><span class=\"TextRun SCXW221888668 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">Table<\/span><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">au<\/span> <\/span><span class=\"FieldRange SCXW221888668 BCX0\"><span class=\"TextRun SCXW221888668 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">1<\/span><\/span><\/span><span class=\"TextRun SCXW221888668 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">. <\/span><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">Quatre traitements de <\/span><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">strat\u00e9gie<\/span><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\"> de gestion des <\/span><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">\u00e9l\u00e9ments<\/span><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\"> nutritifs <\/span><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">r\u00e9p\u00e9t\u00e9s en 2018 et 2019<\/span><span class=\"NormalTextRun SCXW221888668 BCX0\" data-ccp-parastyle=\"caption\">\u00a0<\/span><\/span><\/strong><span class=\"EOP SCXW221888668 BCX0\" data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:240}\">\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-825a82b elementor-widget elementor-widget-image\" data-id=\"825a82b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"693\" height=\"396\" src=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Four-Nutrient-Management-Strategy-Treatments-FR.png\" class=\"attachment-large size-large wp-image-10205\" alt=\"\" srcset=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Four-Nutrient-Management-Strategy-Treatments-FR.png 693w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Four-Nutrient-Management-Strategy-Treatments-FR-300x171.png 300w\" sizes=\"(max-width: 693px) 100vw, 693px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1f43b7f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1f43b7f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-39092a9\" data-id=\"39092a9\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3bbdf03 elementor-widget elementor-widget-image\" data-id=\"3bbdf03\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"522\" height=\"472\" src=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Nutrient-Management-in-Organic-Vegetables.png\" class=\"attachment-large size-large wp-image-10021\" alt=\"\" srcset=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Nutrient-Management-in-Organic-Vegetables.png 522w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Nutrient-Management-in-Organic-Vegetables-300x271.png 300w\" sizes=\"(max-width: 522px) 100vw, 522px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Kira Borden, boursi\u00e8re postdoctorale, en r\u00e9colte dans les parcelles d'exp\u00e9rimentation de la ferme de l'UBC. (Photo soumise)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5376d17 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5376d17\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a8de159\" data-id=\"a8de159\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8342aaf elementor-widget elementor-widget-heading\" data-id=\"8342aaf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">\u00c9valuer les compromis entre les r\u00e9gions <\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6c5c8e8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6c5c8e8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ec3ed0d\" data-id=\"ec3ed0d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e98fd00 elementor-widget elementor-widget-text-editor\" data-id=\"e98fd00\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span data-contrast=\"auto\">Pour \u00e9valuer comment les compromis \u00e9conomiques et environnementaux des diff\u00e9rentes strat\u00e9gies de gestion des \u00e9l\u00e9ments nutritifs varient selon les sols, les conditions climatiques et les co\u00fbts des \u00e9l\u00e9ments nutritifs, nous avons \u00e9tabli des essais dans 20 fermes mara\u00eech\u00e8res mixtes (\u00ab fermes filles \u00bb) dans trois r\u00e9gions du sud-ouest de la Colombie-Britannique. Ces essais ont \u00e9t\u00e9 men\u00e9s par Amy Norgaard, \u00e9tudiante \u00e0 la ma\u00eetrise. Dans les fermes filles, nous avons compar\u00e9 les m\u00eames traitements que dans les fermes m\u00e8res (tableau 1), mais sans t\u00e9moin, ce qui aurait pu entra\u00eener une baisse de rendements.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">Nous n\u2019avons observ\u00e9 aucune diff\u00e9rence dans les rendements lorsque les trois r\u00e9gions ont \u00e9t\u00e9 prises en compte. Cependant, au cours de la deuxi\u00e8me ann\u00e9e, dans la vall\u00e9e du Fraser (une r\u00e9gion dot\u00e9e de sols riches en P et o\u00f9 les composts sont peu co\u00fbteux et \u00e0 haute teneur en \u00e9l\u00e9ments nutritifs), nous avons observ\u00e9 des rendements plus \u00e9lev\u00e9s dans les parcelles <\/span><i><span data-contrast=\"auto\">Compost \u00c9lev\u00e9<\/span><\/i><span data-contrast=\"auto\"> comparativement aux parcelles <\/span><i><span data-contrast=\"auto\">Typique<\/span><\/i><span data-contrast=\"auto\">. Nous n\u2019avons pas constat\u00e9 de diff\u00e9rences constantes dans le co\u00fbt des intrants, sauf dans la vall\u00e9e du Fraser, avec le co\u00fbt le plus bas dans les parcelles <\/span><i><span data-contrast=\"auto\">Typique<\/span><\/i><span data-contrast=\"auto\">.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">De fa\u00e7on g\u00e9n\u00e9rale, les niveaux de phosphore laiss\u00e9 dans le sol \u00e9taient 21% plus \u00e9lev\u00e9s avec le traitement <\/span><i><span data-contrast=\"auto\">Compost \u00c9lev\u00e9<\/span><\/i><span data-contrast=\"auto\"> comparativement au traitement <\/span><i><span data-contrast=\"auto\">Faible Compost + N<\/span><\/i><span data-contrast=\"auto\">. Par ailleurs, le traitement <\/span><i><span data-contrast=\"auto\">Compost \u00c9lev\u00e9<\/span><\/i><span data-contrast=\"auto\"> a engendr\u00e9 des niveaux \u00e9lev\u00e9s de nitrates dans le sol apr\u00e8s la r\u00e9colte dans les fermes utilisant du compost \u00e0 haute teneur en azote (\u00e9chantillonn\u00e9 \u00e0 une profondeur de 0-30 cm). Ces \u00e9l\u00e9ments nutritifs suppl\u00e9mentaires laiss\u00e9s dans le sol pourraient \u00eatre pr\u00e9occupants pour l\u2019environnement s\u2019il n\u2019y a pas de culture de couverture pour les absorber.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f36e35e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f36e35e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a7f4bb7\" data-id=\"a7f4bb7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fe17eb5 elementor-widget elementor-widget-image\" data-id=\"fe17eb5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"552\" height=\"473\" src=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Harvesting-at-UBC-Farm-Experimental-Plots.png\" class=\"attachment-large size-large wp-image-10023\" alt=\"\" srcset=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Harvesting-at-UBC-Farm-Experimental-Plots.png 552w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Harvesting-at-UBC-Farm-Experimental-Plots-300x257.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Kira Borden, boursi\u00e8re postdoctorale, dans les parcelles d'exp\u00e9rimentation de la ferme de l'UBC. (Photo soumise)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5a7e89e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5a7e89e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-588456b\" data-id=\"588456b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-39f9567 elementor-widget elementor-widget-heading\" data-id=\"39f9567\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Conclusions et prochaines \u00e9tapes <\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6516c00 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6516c00\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-419d5c3\" data-id=\"419d5c3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0c59685 elementor-widget elementor-widget-text-editor\" data-id=\"0c59685\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"TextRun SCXW241976031 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW241976031 BCX0\">Les <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">r\u00e9sultats<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> de nos essais sur l<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">es<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> \u00ab\u202fferme<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">s<\/span> <span class=\"NormalTextRun SCXW241976031 BCX0\">m\u00e8re<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">s<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u202f\u00bb ont clairement <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">d\u00e9montr\u00e9<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> une utilisation des <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9l\u00e9ments<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> nutritifs plus efficace avec le traitement <\/span><\/span><span class=\"TextRun SCXW241976031 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW241976031 BCX0\">Faible <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">C<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">ompost + N<\/span><\/span><span class=\"TextRun SCXW241976031 BCX0\" lang=\"FR-CA\" xml:lang=\"FR-CA\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW241976031 BCX0\">. <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">L\u2019utilisation de cette approche peut <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">amoindrir<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> les compromis entre <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">les objectifs<\/span> <span class=\"NormalTextRun SCXW241976031 BCX0\">d\u2019ordre <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9conomique<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> et environnementa<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">l<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">. Les <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">r\u00e9sultats<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> des \u00ab\u202ffermes filles\u202f\u00bb <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9taient<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> similaires<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">, <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">mais moins <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">r\u00e9v\u00e9lateurs<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> en <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">raison de la <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">variabilit\u00e9<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> entre <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">les <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">r\u00e9gions<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> et les <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">diff\u00e9rences<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> dans la gestion des fermes. <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">L\u2019analyse des \u00ab\u202ffermes filles\u202f\u00bb<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> a confirm<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> qu\u2019une gestion <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">inefficace<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> des <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9l\u00e9ments<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> nutritifs entra<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00ee<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">ne des risques environnementaux <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">(en raison de la perte potentielle d\u2019<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9l\u00e9ments<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> nutritifs), mais aussi que de nombreux <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">producteurs<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> de la Colombie-Britannique <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">g\u00e8rent<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> d\u00e9j\u00e0 ces compromis efficacement. <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">L\u2019analyse <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9conomique<\/span> <span class=\"NormalTextRun SCXW241976031 BCX0\">d\u00e9taill\u00e9e<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> en cours nous aidera <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e0<\/span> <span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9valuer<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> ces compromis potentiels. Une mise en garde importante\u202f: les <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">strat\u00e9gies<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> de gestion des <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e9l\u00e9ments<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> nutritifs que nous avons <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">utilis\u00e9es<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> devraient<\/span> <span class=\"NormalTextRun SCXW241976031 BCX0\">modifier<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> progressivement<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> les <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">propri\u00e9t\u00e9s<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> du sol <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">telles que la teneur en phosphore et la mati\u00e8re organique. Il sera important pour les recherches futures d\u2019\u00e9valuer les impacts <\/span><span class=\"NormalTextRun SCXW241976031 BCX0\">\u00e0<\/span><span class=\"NormalTextRun SCXW241976031 BCX0\"> long terme de ces strat\u00e9gies.\u00a0\u00a0<\/span><\/span><span class=\"EOP SCXW241976031 BCX0\" data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:160,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-072f3f2 elementor-widget elementor-widget-spacer\" data-id=\"072f3f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d6f5b2d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d6f5b2d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4b9e6e1\" data-id=\"4b9e6e1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3a25c54 elementor-widget elementor-widget-text-editor\" data-id=\"3a25c54\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>La Grappe scientifique biologique 3 est dirig\u00e9e par la\u00a0<a href=\"https:\/\/www.organicfederation.ca\/fr\">F\u00e9d\u00e9ration biologique du Canada<\/a>, en collaboration avec le\u00a0<a href=\"https:\/\/www.dal.ca\/faculty\/agriculture\/oacc\/fr-accueil.html\" target=\"_blank\" rel=\"noopener nofollow\">Centre d\u2019agriculture biologique du Canada \u00e0 l\u2019Universit\u00e9 Dalhousie<\/a>, et soutenue par le\u00a0<a href=\"http:\/\/www.agr.gc.ca\/fra\/programmes-et-services\/programme-agri-science-grappes\/?id=1511185929317\" target=\"_blank\" rel=\"noopener nofollow\">programme Agri-science<\/a>\u00a0d\u2019Agriculture et Agroalimentaire Canada, dans le cadre strat\u00e9gique du\u00a0<a href=\"http:\/\/www.agr.gc.ca\/fra\/a-propos-de-nous\/initiatives-ministerielles-importantes\/partenariat-canadien-pour-l-agriculture\/?id=1461767369849\" target=\"_blank\" rel=\"noopener nofollow\">Partenariat canadien pour l\u2019agriculture<\/a>\u00a0(un investissement f\u00e9d\u00e9ral-provincial-territorial), et par plus de 70 partenaires du secteur biologique.<\/p><p>Ce magazine peut \u00eatre ainsi r\u00e9f\u00e9renc\u00e9 : Geldart, E. Graves, M.E., Boudreau, N., Wallace, J., et Hammermeister, A.M. (r\u00e9dacteurs). 2022. La Science du Bio au Canada. Volume 4. F\u00e9d\u00e9ration biologique du Canada, Montr\u00e9al, QC et Universit\u00e9 Dalhousie, Truro, N.-\u00c9. 40 p. www.dal.ca\/oacc\/oscIII<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-90ab7f2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"90ab7f2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fa8088d\" data-id=\"fa8088d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-af95178 elementor-widget elementor-widget-image\" data-id=\"af95178\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"132\" src=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Final-Magazine-Logo-Line-1-1024x169.png\" class=\"attachment-large size-large wp-image-10133\" alt=\"\" srcset=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Final-Magazine-Logo-Line-1-1024x169.png 1024w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Final-Magazine-Logo-Line-1-300x50.png 300w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Final-Magazine-Logo-Line-1-768x127.png 768w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Final-Magazine-Logo-Line-1-1536x254.png 1536w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Final-Magazine-Logo-Line-1.png 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-72ab03a elementor-widget elementor-widget-spacer\" data-id=\"72ab03a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-72b367d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"72b367d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-47db63c\" data-id=\"47db63c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cdbe707 elementor-widget elementor-widget-image\" data-id=\"cdbe707\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"534\" height=\"700\" src=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Grain-Miller-AD-FR.png\" class=\"attachment-large size-large wp-image-10207\" alt=\"\" srcset=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Grain-Miller-AD-FR.png 534w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Grain-Miller-AD-FR-229x300.png 229w\" sizes=\"(max-width: 534px) 100vw, 534px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-e72acda\" data-id=\"e72acda\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5a035f6 elementor-widget elementor-widget-image\" data-id=\"5a035f6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"538\" height=\"701\" src=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/WGRF-Ad-FR.png\" class=\"attachment-large size-large wp-image-10209\" alt=\"\" srcset=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/WGRF-Ad-FR.png 538w, https:\/\/organicfederation.ca\/wp-content\/uploads\/WGRF-Ad-FR-230x300.png 230w\" sizes=\"(max-width: 538px) 100vw, 538px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-daaf162 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"daaf162\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-aaaf323\" data-id=\"aaaf323\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-054a14e elementor-widget elementor-widget-image\" data-id=\"054a14e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"338\" height=\"355\" src=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Litefarm-Ad-FR.png\" class=\"attachment-large size-large wp-image-10211\" alt=\"\" srcset=\"https:\/\/organicfederation.ca\/wp-content\/uploads\/Litefarm-Ad-FR.png 338w, https:\/\/organicfederation.ca\/wp-content\/uploads\/Litefarm-Ad-FR-286x300.png 286w\" sizes=\"(max-width: 338px) 100vw, 338px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Par Sean Smukler Faculty of Land and Food Systems, Universit\u00e9 de la Colombie-Britannique Objectifs \u00e9conomiques et environnementaux\u202f: les producteurs biologiques peuvent-ils cocher les deux cases en mati\u00e8re de gestion des \u00e9l\u00e9ments nutritifs? Un approvisionnement trop faible en \u00e9l\u00e9ments nutritifs peut entra\u00eener une r\u00e9duction des rendements et des revenus. La gestion des \u00e9l\u00e9ments nutritifs est l\u2019une [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"doc_category":[59],"doc_tag":[],"class_list":["post-10203","docs","type-docs","status-publish","hentry","doc_category-la-science-du-bio-au-canada-printemps-2022"],"year_month":"2026-04","word_count":1694,"total_views":"430","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"Emma Bryce","author_nicename":"emmabryce","author_url":"https:\/\/organicfederation.ca\/fr\/author\/emmabryce\/"},"doc_category_info":[{"term_name":"La Science du Bio au Canada - Printemps 2022","term_url":"https:\/\/organicfederation.ca\/fr\/ressource\/la-science-du-bio-au-canada-printemps-2022\/"}],"doc_tag_info":[],"knowledge_base_info":[],"knowledge_base_slug":[],"_links":{"self":[{"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/docs\/10203","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/comments?post=10203"}],"version-history":[{"count":8,"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/docs\/10203\/revisions"}],"predecessor-version":[{"id":10448,"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/docs\/10203\/revisions\/10448"}],"wp:attachment":[{"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/media?parent=10203"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/doc_category?post=10203"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/organicfederation.ca\/fr\/wp-json\/wp\/v2\/doc_tag?post=10203"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}