{"id":33975,"date":"2023-12-06T14:22:32","date_gmt":"2023-12-06T13:22:32","guid":{"rendered":"https:\/\/www.asparagusworld.com\/?post_type=news&p=33975"},"modified":"2025-07-08T08:22:27","modified_gmt":"2025-07-08T08:22:27","slug":"new-zealand-how-much-nitrogen-does-asparagus-need","status":"publish","type":"news","link":"https:\/\/befve.com\/es\/news\/new-zealand-how-much-nitrogen-does-asparagus-need\/","title":{"rendered":"New Zealand : how much\u00a0nitrogen does asparagus need?"},"content":{"rendered":"\n
\n

Les experts estiment que les engrais azot\u00e9s doivent \u00eatre appliqu\u00e9s durant les premi\u00e8res ann\u00e9es d\u2019implantation des cultures d\u2019asperges, mais qu\u2019ensuite, seul l\u2019azote export\u00e9 lors de la r\u00e9colte doit \u00eatre remplac\u00e9<\/strong>.<\/p>\n\n\n\n

De mani\u00e8re anecdotique, l\u2019asperge est consid\u00e9r\u00e9e comme une culture \u00e0 faible besoin en azote<\/strong>, mais les pratiques agricoles en Nouvelle-Z\u00e9lande ne refl\u00e8tent pas toujours cela<\/strong>.
Par exemple, une enqu\u00eate men\u00e9e en 2019<\/strong> aupr\u00e8s des producteurs de la r\u00e9gion de Waikato<\/strong> a r\u00e9v\u00e9l\u00e9 une large gamme de doses appliqu\u00e9es<\/strong>, avec des apports souvent sup\u00e9rieurs aux quantit\u00e9s export\u00e9es par les cultures<\/strong>.<\/p>\n\n\n\n

Manque de directives sp\u00e9cifiques pour les nitrates dans les cultures d\u2019asperges n\u00e9o-z\u00e9landaises<\/h3>\n\n\n\n

Il y a quelques ann\u00e9es, LandWISE<\/strong>, une organisation promouvant la gestion durable des terres, a travaill\u00e9 avec des mara\u00eechers de Levin<\/strong>, inquiets des pertes d\u2019azote vers le lac Horowhenua<\/strong>.
Ils ont mis au point un mod\u00e8le simple de budget nutritionnel<\/strong>, adapt\u00e9 \u00e0 la plupart des cultures.
Mais lorsque Dan Bloomer<\/strong>, responsable de LandWISE, a appris que les producteurs d\u2019asperges souhaitaient \u00e9galement l\u2019utiliser, il s\u2019est rendu compte qu\u2019aucune donn\u00e9e fiable ni directive sp\u00e9cifique<\/strong> n\u2019existait pour les asperges vertes<\/strong>.<\/p>\n\n\n\n

\u00c0 la suite de discussions avec le NZ Asparagus Council<\/strong>, et gr\u00e2ce \u00e0 un financement du Rural Professionals Fund<\/strong> dans le cadre du National Science Challenge \u00abOur Land and Water\u00bb<\/strong>, un essai de gestion des nitrates<\/strong> a \u00e9t\u00e9 lanc\u00e9.<\/p>\n\n\n\n

Certains producteurs appliquent beaucoup plus d\u2019azote que ce qui est export\u00e9 \u00e0 la r\u00e9colte<\/h3>\n\n\n\n

Malheureusement, la participation des producteurs a \u00e9t\u00e9 limit\u00e9e<\/strong> \u00e0 cause du confinement li\u00e9 au Covid-19<\/strong> et d\u2019une saison tr\u00e8s difficile en 2021<\/strong>.
Mais malgr\u00e9 ces difficult\u00e9s, plusieurs enseignements ont pu \u00eatre tir\u00e9s<\/strong>.
Une grande vari\u00e9t\u00e9 de pratiques de gestion de l\u2019azote<\/strong> a \u00e9t\u00e9 observ\u00e9e, sans consensus<\/strong> sur une \u00abmeilleure pratique\u00bb \u00e0 l\u2019\u00e9chelle de la fili\u00e8re.<\/p>\n\n\n\n

\n

Bloomer rapporte des t\u00e9moignages allant de :
\u00ab Je ne mets pas d\u2019azote sur mes asperges, je le garde pour mes brocolis \u00bb,
\u00e0 :
\u00ab J\u2019en mets parce que mon p\u00e8re en mettait. \u00bb<\/p>\n<\/blockquote>\n\n\n\n

\n

\u00ab Il n\u2019existe donc pas de pratique standardis\u00e9e dans la fili\u00e8re<\/strong>, \u00bb r\u00e9sume-t-il.<\/p>\n<\/blockquote>\n\n\n\n

Certains producteurs appliquaient des doses bien sup\u00e9rieures \u00e0 l\u2019azote export\u00e9 par la culture r\u00e9colt\u00e9e<\/strong>.
Les chercheurs estiment que la quantit\u00e9 de NO\u2083-N export\u00e9e<\/strong> par la r\u00e9colte est d\u2019environ 12 \u00e0 13 kg NO\u2083-N\/ha<\/strong>,
tandis que certains producteurs de l\u2019essai ont d\u00e9clar\u00e9 appliquer 24, 55 ou m\u00eame 69 kg NO\u2083-N\/ha<\/strong> d\u2019engrais azot\u00e9.<\/p>\n\n\n\n

Sources :<\/strong><\/p>\n\n\n\n

Project report: Collaborative Research Towards Best Practice Nitrogen Management in Asparagus Cropping: Final report<\/a>.<\/p>\n\n\n\n

How Much Nitrogen Does Asparagus Need?<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

With consumers demanding more sustainable farming, and\u00a0the\u00a0prospect of New Zealand growing more asparagus once\u00a0robotic harvesters come into commercial use, researchers have been exploring nitrates use in the country\u2019s asparagus sector.<\/p>\n","protected":false},"featured_media":36684,"template":"","meta":{"_acf_changed":false},"news_categories":[53],"class_list":["post-33975","news","type-news","status-publish","has-post-thumbnail","hentry","news_categories-production"],"acf":[],"yoast_head":"\nNew Zealand : how much\u00a0nitrogen does asparagus need? - Befve & Co<\/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:\/\/befve.com\/es\/news\/new-zealand-how-much-nitrogen-does-asparagus-need\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New Zealand : how much\u00a0nitrogen does asparagus need? 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