{"id":1141,"date":"2021-03-10T14:34:27","date_gmt":"2021-03-10T13:34:27","guid":{"rendered":"https:\/\/www.msbiotech.net\/?p=1141"},"modified":"2024-04-08T15:46:34","modified_gmt":"2024-04-08T13:46:34","slug":"la-nutrition-foliaire-les-3-mecanismes-principaux","status":"publish","type":"post","link":"https:\/\/www.msbiotech.net\/fr\/la-nutrizione-fogliare-i-3-meccanismi-principali\/","title":{"rendered":"La nutrition foliaire : les 3 principaux m\u00e9canismes"},"content":{"rendered":"<p>Bien que la racine soit l'organe charg\u00e9 d'absorber l'eau et les min\u00e9raux du milieu ext\u00e9rieur, les feuilles et les autres organes du feuillage ont, tout au long de l'\u00e9volution des plantes, conserv\u00e9 la capacit\u00e9 d'absorber les \u00e9l\u00e9ments min\u00e9raux en solution aqueuse et d'am\u00e9liorer la nutrition foliaire.<\/p>\n<p>En effet, les feuilles de la plupart des esp\u00e8ces v\u00e9g\u00e9tales sont bien \u00e9quip\u00e9es pour absorber l'eau, les acides amin\u00e9s, d'autres compos\u00e9s organiques et m\u00eame des min\u00e9raux entiers.<\/p>\n<p>Au cours de leur \u00e9volution, les plantes ont d\u00e9velopp\u00e9 de multiples strat\u00e9gies de survie et l'absorption de la nutrition foliaire est l'un de ces syst\u00e8mes indispensables.<\/p>\n<p><strong>Un bon exemple du processus naturel de nutrition des feuilles se trouve dans les for\u00eats tropicales.<\/strong><\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-1142 alignleft\" src=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-darius-krause-2609106-200x300.jpg\" alt=\"\" width=\"303\" height=\"455\" srcset=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-darius-krause-2609106-200x300.jpg 200w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-darius-krause-2609106-683x1024.jpg 683w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-darius-krause-2609106-768x1152.jpg 768w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-darius-krause-2609106-1600x2400.jpg 1600w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-darius-krause-2609106-1024x1536.jpg 1024w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-darius-krause-2609106-1365x2048.jpg 1365w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-darius-krause-2609106-scaled.jpg 1707w\" sizes=\"(max-width: 303px) 100vw, 303px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Dans ces for\u00eats, o\u00f9 de grands arbres couvrent toute la surface, les plantes du sous-bois ne re\u00e7oivent qu'une tr\u00e8s faible part du rayonnement lumineux filtrant pour r\u00e9aliser la photosynth\u00e8se.  Par cons\u00e9quent, elles ne peuvent produire qu'une quantit\u00e9 limit\u00e9e de sucres pour leur croissance.<\/p>\n<p>La plupart d'entre eux ont cependant d\u00e9velopp\u00e9 un syst\u00e8me d'absorption secondaire.<\/p>\n<p>Elles r\u00e9ussissent dans un environnement aussi difficile parce qu'elles sont capables d'absorber activement des acides amin\u00e9s, des min\u00e9raux et m\u00eame des fractions d'humus organique par l'interm\u00e9diaire de leurs feuilles.<\/p>\n<p>Ces mol\u00e9cules organiques proviennent des couches sup\u00e9rieures de la for\u00eat qui recouvrent le sous-bois, o\u00f9 s'accumulent de fines poussi\u00e8res (organiques), des insectes morts, des fientes d'oiseaux, des algues et des mousses.<\/p>\n<p>&nbsp;<\/p>\n<h2><strong>3 M\u00c9CANISMES PRINCIPAUX\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/strong><\/h2>\n<p>Il existe essentiellement trois modes d'absorption foliaire de l'eau et des nutriments (min\u00e9raux, mol\u00e9cules organiques, acides amin\u00e9s, etc :)<\/p>\n<ul>\n<li>par des poils glandulaires (<strong>trichomes<\/strong>),<\/li>\n<li>\u00e0 travers les couches de cire de la feuille (<strong>cuticule<\/strong>)<\/li>\n<li>par absorption et lib\u00e9ration \u00e0 travers les cellules (<strong>endocytose)<\/strong>.<\/li>\n<\/ul>\n<p>Les stomates se pr\u00eatent \u00e9galement \u00e0 l'absorption d'eau et de sels min\u00e9raux, mais comme la plupart d'entre eux sont concentr\u00e9s sur la face inf\u00e9rieure de la feuille, c'est un signe clair qu'ils ne sont pas les organes proprement d\u00e9di\u00e9s \u00e0 l'absorption d'eau et de nutriments.<\/p>\n<p>&nbsp;<\/p>\n<h3><strong>ABSORPTION PAR LES POILS GLANDULAIRES<\/strong><\/h3>\n<ul>\n<li>Les trichomes (poils glandulaires) sont des excroissances unicellulaires de l'\u00e9piderme. Les min\u00e9raux sous forme cationique et les acides amin\u00e9s sont g\u00e9n\u00e9ralement bien absorb\u00e9s par ces organes.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"alignnone wp-image-1143\" src=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Tomato-Trichomes-300x222.png\" alt=\"\" width=\"409\" height=\"302\" srcset=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Tomato-Trichomes-300x222.png 300w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Tomato-Trichomes.png 482w\" sizes=\"(max-width: 409px) 100vw, 409px\" \/>\u00a0 \u00a0 \u00a0 \u00a0 <img decoding=\"async\" class=\"alignnone size-medium wp-image-1144\" src=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Trichomes7-scaled-1-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Trichomes7-scaled-1-225x300.jpg 225w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Trichomes7-scaled-1-768x1024.jpg 768w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Trichomes7-scaled-1-1800x2400.jpg 1800w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Trichomes7-scaled-1-1152x1536.jpg 1152w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Trichomes7-scaled-1-1536x2048.jpg 1536w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Trichomes7-scaled-1.jpg 1920w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/p>\n<h3><strong>ABSORPTION \u00c0 TRAVERS LA CUTICULE<\/strong><\/h3>\n<ul>\n<li>La cuticule est une couche hydrophobe compos\u00e9e de cires et de cutine d\u00e9pos\u00e9e exclusivement \u00e0 l'ext\u00e9rieur des cellules de l'\u00e9piderme avec une fonction protectrice.<\/li>\n<\/ul>\n<p>La cuticule, en raison de sa plus grande capacit\u00e9 d'interception des gouttelettes et de sa grande surface de contact, est <strong>la mani\u00e8re pr\u00e9dominante<\/strong> dans le processus d'absorption des feuilles.<\/p>\n<p>Les solut\u00e9s diffusent par osmose \u00e0 travers les couches cellulaires de la feuille en exploitant un gradient de concentration \u00e9tabli entre la forte concentration de la solution appliqu\u00e9e \u00e0 la surface de la feuille et la faible concentration du solut\u00e9 dans les cellules.<\/p>\n<p style=\"text-align: center;\"><em><strong>ANATOMIE DE LA FEUILLE<\/strong><\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1145 size-full\" src=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/1024px-Anatomia_foglia_g1.jpg\" alt=\"Anatomie de la feuille\" width=\"1024\" height=\"695\" srcset=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/1024px-Anatomia_foglia_g1.jpg 1024w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/1024px-Anatomia_foglia_g1-300x204.jpg 300w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/1024px-Anatomia_foglia_g1-768x521.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li>Le haut <strong>l'humidit\u00e9<\/strong> favorise la p\u00e9n\u00e9tration des nutriments ioniques en r\u00e9duisant les propri\u00e9t\u00e9s hydrophobes de la cuticule et en augmentant le diam\u00e8tre des pores, ce qui retarde la d\u00e9shydratation des gouttelettes pulv\u00e9ris\u00e9es.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul>\n<li>La <strong>rayonnement lumineux<\/strong> a un effet positif sur l'absorption, favorisant l'ouverture des flocons, l'activit\u00e9 photosynth\u00e9tique et la perm\u00e9abilit\u00e9 de la cuticule \u00e0 proximit\u00e9 des cellules de garde.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul>\n<li>En outre <strong>la temp\u00e9rature<\/strong> a un effet indirect sur l'absorption, mais il est li\u00e9 \u00e0 l'augmentation de la fluidit\u00e9 des cires cuticulaires, ce qui am\u00e9liore le mouvement des solut\u00e9s apolaires et donc l'absorption de la solution nutritive.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3><strong>ABSORPTION PAR ENDOCYTOSE<\/strong><\/h3>\n<ul>\n<li>Par endocytose, les min\u00e9raux pr\u00e9sents sur la feuille sont absorb\u00e9s par les cellules \u00e9pidermiques et transport\u00e9s vers des cellules de stockage (vacuoles), qui absorbent et stockent les min\u00e9raux en vue d'une utilisation ult\u00e9rieure.<\/li>\n<\/ul>\n<p>La figure suivante illustre la premi\u00e8re partie de ce processus.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1147\" src=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Bladbemesting-uitgesneden-300x121.jpg\" alt=\"Anatomie de la feuille\" width=\"412\" height=\"166\" srcset=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Bladbemesting-uitgesneden-300x121.jpg 300w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Bladbemesting-uitgesneden-1024x411.jpg 1024w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Bladbemesting-uitgesneden-768x309.jpg 768w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/Bladbemesting-uitgesneden.jpg 1085w\" sizes=\"(max-width: 412px) 100vw, 412px\" \/>\u00a0 <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1148\" src=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/endocitosi-fasi-300x98.jpg\" alt=\"\" width=\"453\" height=\"148\" srcset=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/endocitosi-fasi-300x98.jpg 300w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/endocitosi-fasi.jpg 452w\" sizes=\"(max-width: 453px) 100vw, 453px\" \/><\/p>\n<p>Le principe fonctionne en fait de la m\u00eame mani\u00e8re que les patchs m\u00e9dicamenteux sur la peau humaine, lib\u00e9rant lentement les m\u00e9dicaments dans le corps \u00e0 travers la peau.<\/p>\n<p>&nbsp;<\/p>\n<h3>Consid\u00e9rations finales<\/h3>\n<p>Toutes les cultures ne sont pas r\u00e9ceptives de la m\u00eame mani\u00e8re \u00e0 la nutrition foliaire. <strong>\"Capacit\u00e9 d'\u00e9change cationique foliaire\".<\/strong>qui diff\u00e8re d'une esp\u00e8ce \u00e0 l'autre.<\/p>\n<p>Il est \u00e9vident que l'administration foliaire, <strong>ne peut pas remplacer<\/strong> Elle peut toutefois constituer un compl\u00e9ment tr\u00e8s utile pour maximiser le potentiel g\u00e9n\u00e9tique productif des cultures.<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li>L'<strong>l'ajout de corroborants et d'adjuvants sp\u00e9cifiques<\/strong> La nutrition par engrais foliaire am\u00e9liore le mouillage de la surface des feuilles en r\u00e9duisant la tension superficielle des gouttelettes et en augmentant l'angle de contact avec la surface mouill\u00e9e.<\/li>\n<\/ul>\n<p>D\u00e9couvrez l'ensemble de nos <a href=\"https:\/\/www.msbiotech.net\/fr\/inoculations-de-champignons-mycorhiziens\/\" target=\"_blank\" rel=\"noopener\">produits innovants<\/a> pour d\u00e9couvrir l'exigence qui vous convient le mieux.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1171 size-full\" src=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/WhatsApp-Image-2021-03-11-at-13.12.14.jpeg\" alt=\"\" width=\"1600\" height=\"900\" srcset=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/WhatsApp-Image-2021-03-11-at-13.12.14.jpeg 1600w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/WhatsApp-Image-2021-03-11-at-13.12.14-300x169.jpeg 300w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/WhatsApp-Image-2021-03-11-at-13.12.14-1024x576.jpeg 1024w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/WhatsApp-Image-2021-03-11-at-13.12.14-768x432.jpeg 768w, https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/WhatsApp-Image-2021-03-11-at-13.12.14-1536x864.jpeg 1536w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/><\/p>\n<p>Lire aussi :<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"V0ew4HCYYD\"><p><a href=\"https:\/\/www.msbiotech.net\/fr\/microorganismes-avantages-pour-les-plantes\/\">Micro-organismes et plantes : les avantages<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"Micro-organismes et plantes : les avantages&quot; - MSBIOTECH - Green Biotechnology\" src=\"https:\/\/www.msbiotech.net\/microrganismi-i-vantaggi-per-le-piante\/embed\/#?secret=URGlk6g9lT#?secret=V0ew4HCYYD\" data-secret=\"V0ew4HCYYD\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>","protected":false},"excerpt":{"rendered":"<p>Au cours de leur \u00e9volution, les plantes ont d\u00e9velopp\u00e9 plusieurs strat\u00e9gies de survie et l'absorption foliaire est l'un de ces syst\u00e8mes indispensables.<\/p>","protected":false},"author":3,"featured_media":1150,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,1],"tags":[21,25],"class_list":["post-1141","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-agricoltura","category-senza-categoria","tag-agricoltura","tag-nutrizione-fogliare"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La nutrizione fogliare: i 3 meccanismi principali - MSBIOTECH - Green Biotechnology<\/title>\n<meta name=\"description\" content=\"I meccanismi di nutrizione fogliare sono tre: attraverso i peli ghiandolari, gli strati di cera sulla foglia ed endocitosi.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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La nutrizione fogliare: i 3 meccanismi principali\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.msbiotech.net\/fr\/la-nutrition-foliaire-les-3-mecanismes-principaux\/\" \/>\n<meta property=\"og:site_name\" content=\"MSBIOTECH - Green Biotechnology\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/msbiotech\" \/>\n<meta property=\"article:published_time\" content=\"2021-03-10T13:34:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-08T13:46:34+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.msbiotech.net\/wp-content\/uploads\/2021\/03\/pexels-kristina-paukshtite-1444620-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1707\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Antonio Mastrodomenico\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Antonio Mastrodomenico\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.msbiotech.net\\\/la-nutrizione-fogliare-i-3-meccanismi-principali\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.msbiotech.net\\\/la-nutrizione-fogliare-i-3-meccanismi-principali\\\/\"},\"author\":{\"name\":\"Antonio Mastrodomenico\",\"@id\":\"https:\\\/\\\/www.msbiotech.net\\\/#\\\/schema\\\/person\\\/67635b2af5aef3f4169a4f51a530fe0e\"},\"headline\":\"La nutrizione fogliare: i 3 meccanismi principali\",\"datePublished\":\"2021-03-10T13:34:27+00:00\",\"dateModified\":\"2024-04-08T13:46:34+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.msbiotech.net\\\/la-nutrizione-fogliare-i-3-meccanismi-principali\\\/\"},\"wordCount\":716,\"publisher\":{\"@id\":\"https:\\\/\\\/www.msbiotech.net\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.msbiotech.net\\\/la-nutrizione-fogliare-i-3-meccanismi-principali\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.msbiotech.net\\\/wp-content\\\/uploads\\\/2021\\\/03\\\/pexels-kristina-paukshtite-1444620-scaled.jpg\",\"keywords\":[\"Agricoltura\",\"Nutrizione fogliare\"],\"articleSection\":[\"Agricoltura\",\"Senza categoria\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.msbiotech.net\\\/la-nutrizione-fogliare-i-3-meccanismi-principali\\\/\",\"url\":\"https:\\\/\\\/www.msbiotech.net\\\/la-nutrizione-fogliare-i-3-meccanismi-principali\\\/\",\"name\":\"La nutrizione fogliare: i 3 meccanismi principali - 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