{"id":3359,"date":"2025-09-29T14:11:39","date_gmt":"2025-09-29T14:11:39","guid":{"rendered":"https:\/\/optmix.efno.fr\/?p=3359"},"modified":"2025-09-29T14:13:49","modified_gmt":"2025-09-29T14:13:49","slug":"x-risks-le-melange-dessences-face-au-stress-hydrique-et-lherbivorie-foliaire","status":"publish","type":"post","link":"https:\/\/optmix.efno.fr\/?p=3359","title":{"rendered":"X-Risks : le m\u00e9lange d\u2019essences face au stress hydrique et l&rsquo;herbivorie foliaire"},"content":{"rendered":"<p>Dans le cadre du PEPR FORESTT X-Risks, des pr\u00e9l\u00e8vements de feuilles de ch\u00eane sur des rejets ont \u00e9t\u00e9 r\u00e9alis\u00e9es d\u00e9but septembre. Sur un total de 1200 feuilles (placettes faibles densit\u00e9s), des mesures de pigments et azote (au Dualex), traits notamment la surface sp\u00e9cifique (SLA), et des observations des dommages par les insectes herbivores (voir photo) ont \u00e9t\u00e9 r\u00e9alis\u00e9es. L\u2019objectif est de voir l\u2019effet combin\u00e9 du risque de stress hydrique et de l\u2019herbivorie (chewers, sap feeders, gall makers, sketetonisers, pr\u00e9sence de punaise), selon le peuplement. Le protocole est r\u00e9alis\u00e9 aussi (sauf les mesures au Dualex) sur deux autres r\u00e9seaux : ORPHEE (Herv\u00e9 Jactel) et GMAP (Xavier Morin) sur d\u2019autres m\u00e9langes \u00e0 base de ch\u00eane. Les mesures seront r\u00e9p\u00e9t\u00e9es pendant 4 ans. Les individus sont mat\u00e9rialis\u00e9s par de la rubalise (voir photo).<\/p>\n<p><a href=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250716_125120_small.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-3362\" src=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250716_125120_small-300x142.jpg\" alt=\"\" width=\"300\" height=\"142\" srcset=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250716_125120_small-300x142.jpg?v=1759155166 300w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250716_125120_small-1024x485.jpg?v=1759155166 1024w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250716_125120_small-768x364.jpg?v=1759155166 768w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250716_125120_small-750x355.jpg?v=1759155166 750w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250716_125120_small.jpg?v=1759155166 1266w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250915_165915_small.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-3361\" src=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250915_165915_small-142x300.jpg\" alt=\"\" width=\"142\" height=\"300\" srcset=\"https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250915_165915_small-142x300.jpg?v=1759155149 142w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250915_165915_small-485x1024.jpg?v=1759155149 485w, https:\/\/optmix.efno.fr\/wp-content\/uploads\/2025\/09\/20250915_165915_small.jpg?v=1759155149 600w\" sizes=\"(max-width: 142px) 100vw, 142px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans le cadre du PEPR FORESTT X-Risks, des pr\u00e9l\u00e8vements de feuilles de ch\u00eane sur des rejets ont \u00e9t\u00e9 r\u00e9alis\u00e9es d\u00e9but septembre. Sur un total de 1200 feuilles (placettes faibles densit\u00e9s), des mesures de pigments et azote (au Dualex), traits notamment la surface sp\u00e9cifique (SLA), et des observations des dommages par les insectes herbivores (voir photo) &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/optmix.efno.fr\/?p=3359\">Lire la suite<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/posts\/3359"}],"collection":[{"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3359"}],"version-history":[{"count":3,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/posts\/3359\/revisions"}],"predecessor-version":[{"id":3366,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=\/wp\/v2\/posts\/3359\/revisions\/3366"}],"wp:attachment":[{"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/optmix.efno.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}