{"id":73614,"date":"2022-05-17T15:54:19","date_gmt":"2022-05-17T13:54:19","guid":{"rendered":"https:\/\/novocenter.novogen-layers.com\/?post_type=experts-articles&#038;p=73614"},"modified":"2022-12-20T16:04:55","modified_gmt":"2022-12-20T15:04:55","slug":"bien-gerer-linteraction-carbonate-de-calcium-coquille-doeuf","status":"publish","type":"experts-articles","link":"https:\/\/novocenter.novogen-layers.com\/fr\/experts-articles\/bien-gerer-linteraction-carbonate-de-calcium-coquille-doeuf\/","title":{"rendered":"Bien g\u00e9rer l&rsquo;interaction carbonate de calcium &#8211; coquille d&rsquo;\u0153uf"},"content":{"rendered":"\n<p>La coquille d\u2019\u0153uf est compos\u00e9e \u00e0 94% de calcite, soit 2.7 g de calcium pour un \u0153uf de 60 g. Le calcium provient majoritairement du carbonate ajout\u00e9 dans les aliments, sous diff\u00e9rentes formes&nbsp;: poudre, particulaire, farines animales, coquilles marines\u2026 Le calcium peut \u00e9galement \u00eatre mobilis\u00e9 \u00e0 partir de l\u2019os m\u00e9dullaire, source interne importante mais qui peut rapidement s\u2019\u00e9puiser si l\u2019on n\u2019apporte pas du calcium via l\u2019aliment. <\/p>\n\n\n\n<p>La qualit\u00e9 de la coquille est donc li\u00e9e \u00e0 la quantit\u00e9 de calcium ing\u00e9r\u00e9e par l\u2019animal, mais pas seulement. Un apport en carbonate grossier (2-5 mm) est n\u00e9cessaire afin de compl\u00e9ter l\u2019apport carbonate poudre (&lt; 0.2 mm) et ainsi permettre un apport continu en calcium au cours de la nuit.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"605\" height=\"423\" src=\"https:\/\/novocenter.novogen-layers.com\/wp-content\/uploads\/2022\/03\/fr-2antoine.png\" alt=\"\" class=\"wp-image-70972\"\/><\/figure><\/div>\n\n\n\n<p>Malgr\u00e9 une bonne gestion de la quantit\u00e9 ing\u00e9r\u00e9e et du rapport carbonate grossier\/poudre, on observe dans certains cas des soucis de fragilit\u00e9 de coquille qui peuvent apparaitre sur des poules \u00e2g\u00e9es, pourquoi&nbsp;?<\/p>\n\n\n\n<p>Un crit\u00e8re est trop souvent n\u00e9glig\u00e9, la solubilit\u00e9 du carbonate grossier&nbsp;! Quand on ach\u00e8te un carbonate, on ach\u00e8te un taux de calcium et une taille de particule. C\u2019est facile \u00e0 contr\u00f4ler en laboratoire et peu couteux. Mais qui se pose la question de la solubilit\u00e9 de ce carbonate&nbsp;? Car entre 2 carri\u00e8res, cette solubilit\u00e9 peut varier \u00e9norm\u00e9ment. Elle est li\u00e9e \u00e0 la structure et la composition chimique, qui ne sont jamais strictement identiques.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/novocenter.novogen-layers.com\/wp-content\/uploads\/2022\/03\/CARBONATE-9-1-1024x768.jpg\" alt=\"\" class=\"wp-image-71070\" width=\"512\" height=\"384\"\/><\/figure><\/div>\n\n\n\n<p>Comment l\u2019analyser&nbsp;? Le principe est simple, le calcium particulaire est solubilis\u00e9 dans le g\u00e9sier de l\u2019animal pour passer dans l\u2019intestin sous forme d\u2019une solution liquide durant la nuit. Il faut donc reproduire un g\u00e9sier artificiel = T\u00b0C&nbsp;: 41\u00b0C, pH&nbsp;: 2 (via l\u2019acide chlorhydrique), avec une l\u00e9g\u00e8re agitation. Ensuite, \u00e0 chaque intervalle de temps d\u00e9finit (30\u2019, 1h, 2h\u2026), il suffit de peser les particules de calcium non solubilis\u00e9es (ou d\u2019analyser le calcium de la solution aqueuse) pour obtenir une cin\u00e9tique de solubilisation. La solubilit\u00e9 n\u2019est jamais une seule analyse, c\u2019est une cin\u00e9tique&nbsp;!<\/p>\n\n\n\n<p>Une fois la cin\u00e9tique de solubilisation connue, vous devez ensuite et seulement ensuite ajuster&nbsp;: soit le taux de calcium, soit le rapport poudre\/particulaire, soit la taille des particules de calcium, soit le management, afin d\u2019atteindre une qualit\u00e9 de coquille optimale.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1666\" height=\"835\" src=\"https:\/\/novocenter.novogen-layers.com\/wp-content\/uploads\/2022\/05\/alc-2.png\" alt=\"\" class=\"wp-image-73630\"\/><\/figure><\/div>\n\n\n\n<p style=\"font-size:17px\">Par exemple ici le S1&nbsp;: situation trop fr\u00e9quemment rencontr\u00e9e, durant 3 heures en fin de nuit, les poules n\u2019auront que leur os m\u00e9dullaire pour finaliser une bonne coquille, tout le calcium \u00e9tant d\u00e9j\u00e0 solubilis\u00e9 (le g\u00e9sier est vide). Il faut donc&nbsp;: soit augmenter la taille des particules de calcium pour retarder la solubilisation, soit ajouter un \u00e9clairage nocturne (lorsque la r\u00e9glementation locale le permet) apr\u00e8s 4h de nuit. L\u2019objectif est de fournir \u00e0 la poule suffisamment de calcium durant toute la p\u00e9riode nocturne (souvent 8h) pour lui permettre de pr\u00e9server son capital osseux le plus longtemps possible.<\/p>\n\n\n\n<p>Sans mesure de la solubilit\u00e9, on travaille en aveugle ! Elle permet en effet d\u2019ajuster au mieux l\u2019apport calcique pour optimiser la qualit\u00e9 de coquille et l\u2019\u00e9tat du lot jusqu\u2019\u00e0 la<br>r\u00e9forme.<\/p>\n\n\n\n<p class=\"has-text-align-right has-small-font-size\">Publi\u00e9 dans Afrique Agriculture\u2013 Mars-Avril 2019<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La qualit\u00e9 de la coquille \u00e9tant li\u00e9e \u00e0 la quantit\u00e9 de calcium ing\u00e9r\u00e9e par l\u2019animal, un apport en carbonate grossier est n\u00e9cessaire pour garantir un apport continu en calcium durant la nuit.<\/p>\n","protected":false},"featured_media":71070,"template":"","categories":[129],"expert":[204],"class_list":["post-73614","experts-articles","type-experts-articles","status-publish","has-post-thumbnail","hentry","category-nutrition-fr","expert-nutrition-specialist"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bien g\u00e9rer l&#039;interaction carbonate de calcium - 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