{"id":1235,"date":"2026-03-28T07:30:00","date_gmt":"2026-03-28T06:30:00","guid":{"rendered":"https:\/\/avenir52.fr\/?p=1235"},"modified":"2026-04-14T08:53:49","modified_gmt":"2026-04-14T06:53:49","slug":"lagriculture-de-conservation-limite-limpact-des-aleas-climatiques","status":"publish","type":"post","link":"https:\/\/avenir52.fr\/index.php\/2026\/03\/28\/lagriculture-de-conservation-limite-limpact-des-aleas-climatiques\/","title":{"rendered":"L\u2019agriculture de conservation limite l\u2019impact des al\u00e9as climatiques"},"content":{"rendered":"\n


Le 6 mars le pr\u00e9sident du Conseil R\u00e9gional Franck Leroy \u00e9tait en d\u00e9placement sur deux fermes haut-marnaises qui pratiquent l\u2019agriculture de conservation des sols (ACS). L\u2019occasion pour les exploitants et la Chambre d\u2019agriculture d\u2019exposer les r\u00e9alit\u00e9s du terrain.<\/strong><\/p>\n\n\n\n

Puisque 80 % de la surface de notre d\u00e9partement est constitu\u00e9e de terres \u00e0 faible potentiel. Certains exploitants ont choisi une autre voie en pratiquant l\u2019agriculture de conservation des sols (ACS) qui repose sur trois piliers : couvrir les sols (par des v\u00e9g\u00e9taux ou des r\u00e9sidus de la culture pr\u00e9c\u00e9dente), limiter (voire supprimer) le travail du sol et implanter une grande diversit\u00e9 de cultures.<\/p>\n\n\n\n

C\u2019est un changement de pratiques, \u00ab beaucoup d\u2019agriculteurs ont perdu cette notion d\u2019observer leurs sols \u00bb, constate Antonio Pereira, conseiller en productions v\u00e9g\u00e9tales \u00e0 la Chambre d\u2019agriculture, qui souligne que la pi\u00e8ce maitresse pour performer en ACS est la couverture du sol. \u00ab Les sols sont travaill\u00e9s avec les vers de terre et les racines. Pour y arriver il faut savoir couvrir les sols avec des couverts multi-esp\u00e8ces, ne pas se tromper dans le choix des esp\u00e8ces \u00bb. Pour lui l\u2019interculture est \u00ab une nouvelle culture qu\u2019il faut apprendre \u00e0 travailler \u00bb. L\u2019id\u00e9e \u00e9tant d\u2019associer plusieurs esp\u00e8ces de l\u00e9gumineuses, crucif\u00e8res et gramin\u00e9es. \u00ab Avant de penser au mat\u00e9riel \u00e0 utiliser, il faut penser au syst\u00e8me qu\u2019on veut mettre en place \u00bb, conseille-t-il.<\/p>\n\n\n\n

Des atouts mais une p\u00e9riode de transition<\/p>\n\n\n\n

Les atouts de l\u2019ACS sont multiples. Tout d\u2019abord les l\u00e9gumineuses captent l\u2019azote de l\u2019air pour le restituer \u00e0 la culture suivante. De plus on limite l\u2019\u00e9rosion du sol et on d\u00e9veloppe l\u2019activit\u00e9 biologique. Seulement 0,5 t de vers de terre sont pr\u00e9sentes sous un hectare de sol labour\u00e9 contre 2 \u00e0 3 t quand on limite l\u2019intensit\u00e9 ou la profondeur de travail du sol. Or d\u00e8s que l\u2019on franchit les 2,5 t de vers de terre \u00e0 l\u2019hectare, les sols sont capables d\u2019absorber 360 mm de pluie en une heure. \u00ab Si on veut collectivement limiter l\u2019impact du d\u00e9r\u00e8glement climatique, limitons le travail du sol et couvrons les sols \u00bb, r\u00e9sume Antonio Pereira.<\/p>\n\n\n\n

Mais la p\u00e9riode de transition pour passer du conventionnel \u00e0 l\u2019ACS peut \u00eatre longue, de 3 \u00e0 7 ans en fonction du type de sol. \u00ab C\u2019est une p\u00e9riode pendant laquelle les agriculteurs peuvent essuyer de gros \u00e9checs car le sol n\u2019est pas pr\u00eat du jour au lendemain \u00e0 passer d\u2019un \u00e9tat travaill\u00e9 de fa\u00e7on m\u00e9canique \u00e0 un \u00e9tat qui ne l\u2019est plus \u00bb, pr\u00e9cise Antonio Pereira qui regrette qu\u2019il n\u2019y ait pas de soutien \u00e9conomique sp\u00e9cifique \u00e0 l\u2019ACS.<\/p>\n\n\n\n

Une r\u00e9gularit\u00e9 de rendements<\/p>\n\n\n\n

A Essey les Ponts, l\u2019exploitation c\u00e9r\u00e9ali\u00e8re de Ga\u00e9tan Bouchot regroupe 481 ha pour 13 cultures diff\u00e9rentes. L\u2019agriculteur s\u2019est tourn\u00e9 vers l\u2019ACS en 2014 car il avait constat\u00e9 que deux parcelles voisines n\u2019avaient pas le m\u00eame rendement. \u00ab On a fait des analyses de sol et il y avait moins d\u20191 % de mati\u00e8re organique. C\u2019est proche du d\u00e9sert, cela veut dire qu\u2019il n\u2019y a plus d\u2019activit\u00e9 dans le sol, on peut mettre de l\u2019engrais autant qu\u2019on veut il ne sera pas utilis\u00e9 par la plante \u00bb, raconte l\u2019exploitant.<\/p>\n\n\n\n

Des l\u00e9gumineuses p\u00e9rennes ont \u00e9t\u00e9 introduites dans les champs et aujourd\u2019hui tous les colzas sont associ\u00e9s \u00e0 des plantes compagnes. Ga\u00e9tan Bouchot indique que l\u2019ACS lui a permis d\u2019obtenir une r\u00e9gularit\u00e9 dans ses rendements : \u00ab les ann\u00e9es o\u00f9 il y a de gros al\u00e9as climatiques, que ce soit la s\u00e9cheresse ou l\u2019exc\u00e8s d\u2019humidit\u00e9, on voit que nos champs r\u00e9sistent plus longtemps \u00bb. Autres avantages, la diminution des apports d\u2019engrais et la r\u00e9duction de la consomation de carburant. \u00ab Avec 100 hectares de plus on utilise presque 20 000 litres de fioul en moins \u00bb, indique-t-il.<\/p>\n\n\n\n

L\u2019ACS n\u2019est pas reconnue<\/p>\n\n\n\n

A Bouzancourt, le GAEC de Savry est une ferme en polyculture \u00e9levage de 388 ha en ACS. Il y a 6 ans les deux associ\u00e9s, Damien et Franck Thi\u00e9blemont, ont mis en place une unit\u00e9 de m\u00e9thanisation en f\u00e9d\u00e9rant une douzaine d\u2019exploitations (dont 6 \u00e9leveurs) dans un rayon de 10 km autour de la ferme. Le gisement du m\u00e9thaniseur, en co-g\u00e9n\u00e9ration, est constitu\u00e9 entre 70 et 75 % d\u2019effluents d\u2019\u00e9levage.<\/p>\n\n\n\n

Les associ\u00e9s pratiquent le semis direct sous couvert et ne travaillent plus leurs sols. \u00ab On est sur un taux de mati\u00e8re organique de 3,3 \u00e0 6,5 % dans nos sols \u00bb, expliquent-ils, l\u00e0 o\u00f9 la moyenne fran\u00e7aise se situe \u00e0 1,6 %. Les \u00e9leveurs regrettent que l\u2019ACS ne soit pas reconnue. \u00ab On parle \u00e9norm\u00e9ment de cr\u00e9dits carbone, mais il n\u2019y a pas de diff\u00e9renciation entre un sol labour\u00e9 et non labour\u00e9 \u00bb, d\u00e9plorent-ils.<\/p>\n\n\n\n

Rema\u00eetriser notre agronomie<\/p>\n\n\n\n

Thierry Lahaye, pr\u00e9sident de la Chambre d\u2019agriculture, explique que \u00ab l\u2019ACS est un moyen d\u2019aller chercher du revenu par la baisse des co\u00fbts de production \u00bb, qui se traduit par une r\u00e9duction de moiti\u00e9 du parc mat\u00e9riels et du temps de passage dans les parcelles. Par exemple la production d\u2019un hectare de bl\u00e9 dans un syst\u00e8me en semis direct consomme deux fois mois de carburant qu\u2019en conventionnel.<\/p>\n\n\n\n

\u00ab Quand on est dans des sols caillouteux les situations de risque sont r\u00e9guli\u00e8res et beaucoup plus fr\u00e9quentes que dans des zones \u00e0 meilleurs potentiels \u00bb, ajoute Thierry Lahaye. \u00ab Le syst\u00e8me colza – bl\u00e9 – orge arrive \u00e0 bout de souffle, entrainant des probl\u00e8mes de salissement de parcelles, alors on a essay\u00e9 de trouver des solutions. L\u2019ACS a permis de rema\u00eetriser notre agronomie \u00bb.<\/p>\n\n\n\n

Pour Franck Leroy, pr\u00e9sident du Conseil R\u00e9gional Grand Est, ces deux exploitations visit\u00e9es sont \u00ab la d\u00e9monstration qu\u2019il n\u2019y a pas qu\u2019un seul mod\u00e8le agricole, mais plusieurs mod\u00e8les agricoles \u00bb qui s\u2019adaptent en fonction des territoires.<\/p>\n\n\n\n

La r\u00e9daction\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

Le 6 mars le pr\u00e9sident du Conseil R\u00e9gional Franck Leroy \u00e9tait en d\u00e9placement sur deux fermes haut-marnaises qui pratiquent l\u2019agriculture de conservation des sols (ACS). […]<\/p>\n","protected":false},"author":3,"featured_media":1236,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[4,5,14],"tags":[],"class_list":["post-1235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cultures","category-elevages","category-machinisme"],"yoast_head":"\nL\u2019agriculture de conservation limite l\u2019impact des al\u00e9as climatiques - L'Avenir Agricole et Rural de la Haute-Marne<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/avenir52.fr\/index.php\/2026\/03\/28\/lagriculture-de-conservation-limite-limpact-des-aleas-climatiques\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u2019agriculture de conservation limite l\u2019impact des al\u00e9as climatiques - L'Avenir Agricole et Rural de la Haute-Marne\" \/>\n<meta property=\"og:description\" content=\"Le 6 mars le pr\u00e9sident du Conseil R\u00e9gional Franck Leroy \u00e9tait en d\u00e9placement sur deux fermes haut-marnaises qui pratiquent l\u2019agriculture de conservation des sols (ACS). 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