{"id":974,"date":"2011-12-20T19:59:00","date_gmt":"2011-12-20T18:59:00","guid":{"rendered":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/?p=974"},"modified":"2023-03-07T09:24:20","modified_gmt":"2023-03-07T08:24:20","slug":"vers-un-raisonnement-innovant-de-la-fertilisation-phosphatee","status":"publish","type":"post","link":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/vers-un-raisonnement-innovant-de-la-fertilisation-phosphatee\/","title":{"rendered":"Fertilisation phosphat\u00e9e"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Vers un raisonnement innovant de la fertilisation phosphat\u00e9e !<\/h1>\n\n\n\n<p>La fertilisation phosphat\u00e9e doit \u00eatre raisonn\u00e9e afin de pr\u00e9server les ressources mini\u00e8res et d\u2019\u00e9viter les probl\u00e8mes environnementaux. Le <strong>phosphore est un \u00e9l\u00e9ment essentiel pour les cultures<\/strong>. En effet, il ne repr\u00e9sente que 0,4 % de la mati\u00e8re s\u00e8che. Mais il joue un<strong> r\u00f4le d\u00e9terminant pour la croissance des plantes<\/strong>, en particulier du syst\u00e8me racinaire. Or il reste encore <strong>limitant dans de nombreux sols<\/strong> dans le monde, mais \u00e9galement en France. Par ailleurs, bien que les stocks de phosphates miniers durent encore jusqu\u2019en 2090, le pic de production devrait \u00eatre atteint vers 2040. Ce n\u2019est donc pas une ressource in\u00e9puisable : il faut l\u2019employer avec sagesse.\u00a0<\/p>\n\n\n\n<p>Actuellement, en France, <strong>le raisonnement de la fertilisation phosphat\u00e9e repose sur la couverture des besoins en phosphore des plantes<\/strong>, tout en \u00e9vitant les pertes dans l\u2019environnement (risque d\u2019eutrophisation notamment) et l\u2019utilisation non justifi\u00e9e \u00e9conomiquement des intrants.<\/p>\n\n\n<div class=\"_3d-flip-book  fb3d-fullscreen-mode full-size\" data-id=\"965\" data-mode=\"fullscreen\" data-title=\"false\" data-template=\"short-white-book-view\" data-lightbox=\"dark-shadow\" data-urlparam=\"fb3d-page\" data-page-n=\"0\" data-pdf=\"\" data-tax=\"null\" data-thumbnail=\"\" data-cols=\"3\" data-book-template=\"default\" data-trigger=\"\"><\/div><script type=\"text\/javascript\">window.FB3D_CLIENT_DATA = window.FB3D_CLIENT_DATA || [];FB3D_CLIENT_DATA.push('eyJwb3N0cyI6eyI5NjUiOnsiSUQiOjk2NSwidGl0bGUiOiJWZXJzIHVuIHJhaXNvbm5lbWVudCBpbm5vdmFudCBkZSBsYSBmZXJ0aWxpc2F0aW9uIHBob3NwaGF0XHUwMGU5ZSAhIiwidHlwZSI6InBkZiIsInJlYWR5X2Z1bmN0aW9uIjoiIiwiYm9va19zdHlsZSI6ImZsYXQiLCJib29rX3RlbXBsYXRlIjoibm9uZSIsIm91dGxpbmUiOltdLCJkYXRhIjp7InBvc3RfSUQiOiI5NzMiLCJndWlkIjoiaHR0cHM6XC9cL25vcm1hbmRpZW1haW5lLmNlcmZyYW5jZS5mclwvYXJhZDJcL3dwLWNvbnRlbnRcL3VwbG9hZHNcL3NpdGVzXC8zXC8yMDIxXC8wMVwvVmVycy11bi1yYWlzb25uZW1lbnQtaW5ub3ZhbnQtZGUtbGEtZmVydGktcGhvc3BoYXRlZV9BUkFEXHUwMGIyXzIwMTEucGRmIiwicGRmX3BhZ2VzIjoiNCIsInBhZ2VzX2N1c3RvbWl6YXRpb24iOiJub25lIn0sInRodW1ibmFpbCI6eyJkYXRhIjp7InBvc3RfSUQiOiIwIn0sInR5cGUiOiJhdXRvIn0sInByb3BzIjp7ImNhY2hlZFBhZ2VzIjoiYXV0byIsInJlbmRlckluYWN0aXZlUGFnZXMiOiJhdXRvIiwicmVuZGVySW5hY3RpdmVQYWdlc09uTW9iaWxlIjoiYXV0byIsInJlbmRlcldoaWxlRmxpcHBpbmciOiJhdXRvIiwicHJlbG9hZFBhZ2VzIjoiYXV0byIsInJ0bCI6ImF1dG8iLCJzaGVldCI6eyJzdGFydFZlbG9jaXR5IjoiYXV0byIsIndhdmUiOiJhdXRvIiwid2lkdGhUZXhlbHMiOiJhdXRvIiwiY29sb3IiOiJhdXRvIiwic2lkZSI6ImF1dG8iLCJjb3JuZXJEZXZpYXRpb24iOiJhdXRvIiwiZmxleGliaWxpdHkiOiJhdXRvIiwiZmxleGlibGVDb3JuZXIiOiJhdXRvIiwiYmVuZGluZyI6ImF1dG8iLCJoZWlnaHRUZXhlbHMiOiJhdXRvIn0sImNvdmVyIjp7IndhdmUiOiJhdXRvIiwiY29sb3IiOiJhdXRvIiwiYmluZGVyVGV4dHVyZSI6ImF1dG8iLCJkZXB0aCI6ImF1dG8iLCJwYWRkaW5nIjoiYXV0byIsInN0YXJ0VmVsb2NpdHkiOiJhdXRvIiwiZmxleGliaWxpdHkiOiJhdXRvIiwiZmxleGlibGVDb3JuZXIiOiJhdXRvIiwiYmVuZGluZyI6ImF1dG8iLCJ3aWR0aFRleGVscyI6ImF1dG8iLCJoZWlnaHRUZXhlbHMiOiJhdXRvIiwibWFzcyI6ImF1dG8iLCJzaWRlIjoiYXV0byJ9LCJwYWdlIjp7IndhdmUiOiJhdXRvIiwiY29sb3IiOiJhdXRvIiwiZGVwdGgiOiJhdXRvIiwic3RhcnRWZWxvY2l0eSI6ImF1dG8iLCJmbGV4aWJpbGl0eSI6ImF1dG8iLCJmbGV4aWJsZUNvcm5lciI6ImF1dG8iLCJiZW5kaW5nIjoiYXV0byIsIndpZHRoVGV4ZWxzIjoiYXV0byIsImhlaWdodFRleGVscyI6ImF1dG8iLCJtYXNzIjoiYXV0byIsInNpZGUiOiJhdXRvIn0sImhlaWdodCI6ImF1dG8iLCJ3aWR0aCI6ImF1dG8iLCJncmF2aXR5IjoiYXV0byIsInBhZ2VzRm9yUHJlZGljdGluZyI6ImF1dG8ifSwiY29udHJvbFByb3BzIjp7ImFjdGlvbnMiOnsiY21kU2F2ZSI6eyJlbmFibGVkIjoiYXV0byIsImVuYWJsZWRJbk5hcnJvdyI6ImF1dG8ifSwiY21kUHJpbnQiOnsiZW5hYmxlZCI6ImF1dG8iLCJlbmFibGVkSW5OYXJyb3ciOiJhdXRvIn0sImNtZFNpbmdsZVBhZ2UiOnsiZW5hYmxlZCI6ImF1dG8iLCJlbmFibGVkSW5OYXJyb3ciOiJhdXRvIiwiYWN0aXZlIjoiYXV0byJ9fX0sImF1dG9UaHVtYm5haWwiOiJodHRwczpcL1wvbm9ybWFuZGllbWFpbmUuY2VyZnJhbmNlLmZyXC9hcmFkMlwvd3AtY29udGVudFwvdXBsb2Fkc1wvc2l0ZXNcLzNcLzNkLWZsaXAtYm9va1wvYXV0by10aHVtYm5haWxzXC85NjUucG5nIiwicG9zdF9uYW1lIjoidmVycy11bi1yYWlzb25uZW1lbnQtaW5ub3ZhbnQtZGUtbGEtZmVydGlsaXNhdGlvbi1waG9zcGhhdGVlIiwicG9zdF90eXBlIjoiM2QtZmxpcC1ib29rIn19LCJwYWdlcyI6W10sImZpcnN0UGFnZXMiOltdfQ==');window.FB3D_CLIENT_LOCALE && FB3D_CLIENT_LOCALE.render && FB3D_CLIENT_LOCALE.render();<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">La fertilisation du phosphore<\/h2>\n\n\n\n<p>Le raisonnement de la <strong>fertilisation du phosphore au plus juste<\/strong> permettrait de pr\u00e9server les ressources mini\u00e8res et d\u2019\u00e9viter les probl\u00e8mes environnementaux li\u00e9s au phosphore. Le raisonnement actuel repose sur le dosage de la teneur en P disponible par extraction chimique et sur l\u2019utilisation de grilles COMIFER. <strong>En raison des incertitudes m\u00e9thodologiques, les doses calcul\u00e9es restent s\u00e9curitaires et une marge de progr\u00e8s est encore possible<\/strong>. Un projet CASDAR a \u00e9t\u00e9 men\u00e9 sur ce th\u00e8me. L\u2019objectif \u00e9tait de valider la pertinence de nouveaux indicateurs de la biodisponibilit\u00e9 du phosphore, notamment en situations contrast\u00e9es. Les r\u00e9sultats sont prometteurs. Mais, il reste encore des essais \u00e0 mener pour les valider compl\u00e8tement. En parall\u00e8le, les <strong>chercheurs ont travaill\u00e9 sur un mod\u00e8le dynamique<\/strong> pour calculer les doses de fertilisation phosphat\u00e9e qui doit permettre de s\u2019affranchir de l\u2019effet type de sol.<\/p>\n\n\n\n<p>Pour que ce raisonnement passe \u00e0 la pratique, il y a <strong>plusieurs obstacles<\/strong> \u00e0 lever<strong> <\/strong> :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>compl\u00e9ter les <strong>r\u00e9f\u00e9rences exp\u00e9rimentales<\/strong>.<\/li><li>r\u00e9alisation de l<strong>\u2019analyse Cp en laboratoire<\/strong>. Actuellement, non r\u00e9alis\u00e9e pour des questions d\u2019automatisation et donc de co\u00fbts.<\/li><li>le <strong>recours aux isotopes<\/strong> est actuellement n\u00e9cessaire pour faire tourner ce mod\u00e8le notamment pour estimer le pouvoir fixateur du sol. <\/li><\/ul>\n\n\n\n<p>Il faudrait trouver des caract\u00e9ristiques du sol qui permettent de s\u2019en affranchir. Le <a href=\"https:\/\/comifer.asso.fr\/fr\/\" target=\"_blank\" rel=\"noreferrer noopener\">COMIFER<\/a> devra encore travailler sur le sujet afin d\u2019adapter leurs outils pour un raisonnement plus efficace de la fertilisation phosphat\u00e9e.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La fertilisation phosphat\u00e9e doit \u00eatre raisonn\u00e9e afin de pr\u00e9server les ressources mini\u00e8res et d\u2019\u00e9viter les probl\u00e8mes environnementaux<\/p>\n","protected":false},"author":4,"featured_media":1774,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[40,32],"tags":[],"class_list":["post-974","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nourrir-les-plantes","category-reductions-dintrants-en-cultures-et-en-elevage"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fertilisation phosphat\u00e9e - L&#039;ARAD2<\/title>\n<meta name=\"description\" content=\"La fertilisation phosphat\u00e9e doit \u00eatre raisonn\u00e9e afin de pr\u00e9server les ressources mini\u00e8res et d\u2019\u00e9viter les probl\u00e8mes environnementaux\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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