{"id":1420,"date":"2026-08-28T14:12:15","date_gmt":"2026-08-28T13:12:15","guid":{"rendered":"https:\/\/ceres.srl\/?p=1420"},"modified":"2026-08-28T14:45:09","modified_gmt":"2026-08-28T13:45:09","slug":"ph-in-fertigation-a-small-variation-can-represent-a-major-change-for-the-plant","status":"publish","type":"post","link":"https:\/\/ceres.srl\/fr\/2026\/08\/28\/ph-in-fertigation-a-small-variation-can-represent-a-major-change-for-the-plant\/","title":{"rendered":"pH en fertirrigation : une petite variation peut repr\u00e9senter un grand changement pour la plante"},"content":{"rendered":"<p data-start=\"81\" data-end=\"155\" class=\"PDq2pG_selectionAnchorContainer\">Le pH est une mesure logarithmique de la concentration en ions H\u207a d\u2019une solution : <strong>pH = \u2212 log [H\u207a]<\/strong><\/p><p data-start=\"174\" data-end=\"311\">Cela signifie qu\u2019une diff\u00e9rence de 1 unit\u00e9 de pH correspond \u00e0 un facteur 10, et qu\u2019une diff\u00e9rence de 2 unit\u00e9s correspond \u00e0 un facteur 100.<\/p><p data-start=\"313\" data-end=\"447\">Exemple : Une solution \u00e0 pH 4 contient donc 100 fois plus de H\u207a qu\u2019une solution \u00e0 pH 6 ( autrement dit, 100 fois plus acide).<\/p><p data-start=\"449\" data-end=\"539\">C\u2019est pourquoi le pH ne doit jamais \u00eatre consid\u00e9r\u00e9 comme une simple valeur secondaire dans le pilotage de la fertirrigation.<\/p>\n<p data-start=\"541\" data-end=\"668\">Pour la majorit\u00e9 des cultures hors plantes acidophiles, nous pouvons retenir comme rep\u00e8res pour la solution d\u2019apport :<\/p><ul data-start=\"670\" data-end=\"850\">\n<li data-section-id=\"1f5vouf\" data-start=\"670\" data-end=\"697\">\nZone optimale : pH 5,3 \u2013 6,3\n<\/li>\n<li data-section-id=\"1s3lih5\" data-start=\"698\" data-end=\"728\">\nZone acceptable : pH 5,0 \u2013 6,6\n<\/li>\n<li data-section-id=\"p1txx8\" data-start=\"729\" data-end=\"756\">\nZone \u00e0 risque :  6,7\n<\/li>\n<li data-section-id=\"17p0te3\" data-start=\"757\" data-end=\"850\">\npH  8,0 : risque important de dommages et de fortes perturbations de l\u2019absorption des \u00e9l\u00e9ments nutritifs\n<\/li><li data-section-id=\"17p0te3\" data-start=\"757\" data-end=\"850\"><strong><u><br><\/u><\/strong><\/li>\n<\/ul><p data-start=\"852\" data-end=\"891\"><strong><u>Pourquoi le suivi r\u00e9gulier est-il si important ?<\/u><\/strong><\/p><p data-start=\"893\" data-end=\"1111\">Un pH anormalement bas ne provoque pas uniquement un d\u00e9s\u00e9quilibre nutritionnel temporaire. Une acidit\u00e9 excessive autour des racines peut endommager les tissus racinaires et les poils absorbants, avec des cons\u00e9quences qui peuvent persister m\u00eame apr\u00e8s correction du pH.<\/p><p data-start=\"1113\" data-end=\"1173\">La s\u00e9curit\u00e9 du syst\u00e8me de fertirrigation est donc essentielle.<\/p><p data-start=\"1175\" data-end=\"1583\">Une<a href=\"https:\/\/ceres.srl\/product\/equipments\/fertirrigation-unit\/\"> unit\u00e9 de fertirrigation moderne <\/a>devrait id\u00e9alement disposer de deux sondes pH, permettant une double v\u00e9rification permanente de la mesure. En cas de valeur aberrante ou de divergence importante entre les deux sondes, le syst\u00e8me devrait disposer d\u2019une alarme prioritaire capable de bloquer l\u2019irrigation, plut\u00f4t que d\u2019envoyer pendant plusieurs cycles une solution potentiellement dangereuse aux plantes.<\/p><p data-start=\"1585\" data-end=\"1689\">Ces sondes doivent \u00e9galement \u00eatre calibr\u00e9es r\u00e9guli\u00e8rement, id\u00e9alement chaque semaine, avec des solutions tampons adapt\u00e9es.<\/p><p>\n\n\n\n\n\n\n\n\n\n\n\n<\/p><p data-start=\"1691\" data-end=\"1898\" data-is-last-node=\"\" data-is-only-node=\"\">Enfin, m\u00eame avec une automatisation compl\u00e8te, un pH-m\u00e8tre ind\u00e9pendant reste un excellent outil de contr\u00f4le terrain pour effectuer quotidiennement des mesures manuelles du pH de la solution d\u2019apport et du drainage.<\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":1424,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_siteseo_robots_primary_cat":"18","pagelayer_contact_templates":[],"_pagelayer_content":"","_themeisle_gutenberg_block_has_review":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[20],"tags":[],"class_list":["post-1420","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical_advices"],"jetpack_featured_media_url":"https:\/\/ceres.srl\/wp-content\/uploads\/2026\/08\/measure-in-field.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/posts\/1420","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/comments?post=1420"}],"version-history":[{"count":3,"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/posts\/1420\/revisions"}],"predecessor-version":[{"id":1425,"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/posts\/1420\/revisions\/1425"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/media\/1424"}],"wp:attachment":[{"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/media?parent=1420"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/categories?post=1420"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceres.srl\/fr\/wp-json\/wp\/v2\/tags?post=1420"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}