{"id":72,"date":"2021-09-10T10:53:33","date_gmt":"2021-09-10T08:53:33","guid":{"rendered":"https:\/\/legrowshop.com\/blog\/?p=72"},"modified":"2023-01-23T12:35:06","modified_gmt":"2023-01-23T11:35:06","slug":"fertilisant-npk-engrais","status":"publish","type":"post","link":"https:\/\/legrowshop.com\/blog\/fertilisant-npk-engrais\/","title":{"rendered":"Les engrais NPK : d\u00e9finition et utilisation"},"content":{"rendered":"<span class=\"rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Temps de lecture\u00a0: <\/span> <span class=\"rt-time\">3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><p>[vc_row][vc_column][vc_column_text]<\/p>\n<p class=\"p1\">Vous avez s\u00fbrement eu l&rsquo;occasion de voir ces trois lettres sur l&#8217;emballage des produits de pour vos plantes. Mais savez-vous ce qu&rsquo;elles signifient ?<\/p>\n<h2 class=\"p2\">Qu&rsquo;est-ce qu&rsquo;un engrais NPK?<\/h2>\n<p class=\"p1\">En 1861, un chimiste agricole allemand du nom de\u00a0<b>Wilhelm Knop<\/b>\u00a0a r\u00e9ussi a d\u00e9terminer les besoins nutritifs n\u00e9cessaires \u00e0 la bonne croissance des plantes vertes. Il s\u2019agit de trois \u00e9l\u00e9ments de chimie :\u00a0<b>NPK<\/b>.<\/p>\n<p class=\"p1\">Ces trois composants sont devenus la base des <a href=\"https:\/\/legrowshop.com\/blog\/engrais-organiques-vs-engrais-mineraux\">engrais organiques et min\u00e9raux<\/a> pour l\u2019horticulture. En effet ces fertilisants g\u00e9n\u00e9riques permettent l\u2019obtention de rendements plus importants mais n\u2019agissent pas sur la fertilit\u00e9 du sol. Ainsi, le risque de lessivage vers les nappes phr\u00e9atiques et les cours d\u2019eau est important avec ce type de produits.<\/p>\n<p class=\"p1\"><b>N<\/b>\u00a0repr\u00e9sente\u00a0<b>l\u2019azote<\/b>. Il favorise la pousse des parties a\u00e9riennes des plantes (tiges et feuilles) et encourage la photosynth\u00e8se. En g\u00e9n\u00e9ral il est recommand\u00e9 pour les plantes, arbustes, arbres et tous types de gazon.<\/p>\n<p class=\"p1\"><b>P<\/b>\u00a0repr\u00e9sente le\u00a0<b>phosphore<\/b>. Il contribue \u00e0 renforcer la r\u00e9sistance naturelle des plantes et poss\u00e8de un r\u00f4le cl\u00e9 sur le d\u00e9veloppement radiculaire.<\/p>\n<p class=\"p1\"><b>K<\/b>\u00a0repr\u00e9sente le\u00a0<b>potassium<\/b>. Tout en soutenant l\u2019action de l\u2019azote, il influence et augmente la r\u00e9sistance de votre plante face aux diff\u00e9rentes maladies. Il est \u00e9galement indispensable pour stimuler la pousse des fleurs ainsi que pour d\u00e9velopper les saveurs et la coloration des fruits et des l\u00e9gumes.<\/p>\n<h2 class=\"p2\">Comprendre la formule NPK sur un emballage ?<\/h2>\n<p class=\"p1\">Suivant le pays o\u00f9 vous vivez, la formule\u00a0<b>NPK<\/b>\u00a0suivie de trois chiffres doit\u00a0<b>obligatoirement<\/b>\u00a0\u00eatre mentionn\u00e9e sur les emballages des engrais. Ces trois chiffres indiquent les diff\u00e9rents\u00a0<b>niveaux<\/b>\u00a0de\u00a0<b>concentration<\/b>\u00a0de l\u2019engrais pour chacun des \u00e9l\u00e9ments N, P et K. Plus les chiffres seront \u00e9lev\u00e9s, plus votre engrais sera concentr\u00e9.<\/p>\n<p class=\"p1\">Exemple : un engrais\u00a0<b>NPK 7-4-7<\/b>\u00a0pour un arbre est beaucoup concentr\u00e9 qu\u2019un engrais\u00a0<b>NPK 9-14-19\u00a0<\/b>pour la fertilisation de rosiers. Le dernier est trois fois plus riche en potassium et en phosphore que le premier, parce qu\u2019il agit sur la floraison et booste la r\u00e9sistance face aux <a href=\"https:\/\/legrowshop.com\/blog\/les-maladies-des-plantes\">maladies<\/a>.<\/p>\n<p class=\"p1\">Selon les fabricants, les dosages peuvent varier. N\u2019h\u00e9sitez pas \u00e0 v\u00e9rifier pour \u00e9viter les erreurs. Si jamais cela vous semble compliqu\u00e9, il existe sur le march\u00e9 des engrais\u00a0<b>NPK<\/b>\u00a0dits \u00ab\u00a0\u00e9quilibr\u00e9s\u00a0\u00bb comme par exemple,\u00a0<b>NPK 7-7-7<\/b>\u00a0ou\u00a0<b>NPK 5-5-5.<\/b><\/p>\n<h2 class=\"p2\">Les diff\u00e9rents types d&rsquo;engrais<\/h2>\n<p class=\"p1\">Les engrais\u00a0<b>NPK<\/b>\u00a0se d\u00e9composent en deux familles : les engrais\u00a0<b>compos\u00e9s<\/b>\u00a0et les engrais\u00a0<b>simples<\/b>. Pour les engrais compos\u00e9s, ils assemblent\u00a0<b>deux<\/b>\u00a0ou\u00a0<b>trois<\/b>\u00a0des \u00e9l\u00e9ments NPK et proposent une couverture compl\u00e8te. N\u00e9anmoins, nous vous conseillons de toujours associer aux engrais NPK des engrais\u00a0<b>organiques<\/b>, afin d\u2019obtenir des apports\u00a0<b>nutritifs<\/b>\u00a0compl\u00e9mentaires.<\/p>\n<p class=\"p1\">Les engrais\u00a0<b>simples<\/b>\u00a0sont souvent compos\u00e9s d\u2019un seul des trois \u00e9l\u00e9ments NPK. On les utilise\u00a0<b>uniquement<\/b>\u00a0pour des cas pr\u00e9cis de carences sur un \u00e9l\u00e9ment chimique choisi.<\/p>\n<h2 class=\"p2\">Utilisation de l&rsquo;engrais NPK<\/h2>\n<p class=\"p1\">Tout est une question de ratio. Pour vous la faire courte, il faut savoir qu\u2019un dosage correct de\u00a0<b>phosphore<\/b>\u00a0et\u00a0<b>d\u2019azote<\/b>\u00a0vous permettra d\u2019obtenir une r\u00e9colte bien plus\u00a0<b>abondante<\/b>\u00a0et de meilleure\u00a0<b>qualit\u00e9<\/b>. Le potassium, lui, est\u00a0<b>indispensable<\/b>\u00a0pour assurer une bonne sant\u00e9 \u00e0 vos plantes.<\/p>\n<p class=\"p1\">Petit conseil : si vous souhaitez conna\u00eetre rapidement le bon ratio d\u2019engrais\u00a0<b>NPK<\/b>\u00a0\u00e0 obtenir selon ce que vous souhaitez faire, il vous faudra tout simplement diviser les trois chiffres apr\u00e8s la mention NPK par le plus petit chiffre qui se trouve sur l\u2019\u00e9tiquette de votre produit.<\/p>\n<ul>\n<li class=\"p1\">Avec un engrais NPK 10-10-10 vous obtiendrez un dosage 1-1-1, donc un engrais \u00e9quilibr\u00e9.<\/li>\n<li class=\"p1\">Avec un engrais NPK 10-5-5 vous obtiendrez un dosage 2-1-1, donc un engrais plus riche en azote (N) qu\u2019en phosphore (P) ou qu\u2019en potassium (K).<\/li>\n<\/ul>\n<p class=\"p1\">Si les ces engrais\u00a0permettent \u00e0 vos plantes d\u2019\u00eatre en bonne sant\u00e9, il faut savoir qu\u2019ils apportent \u00e9galement toutes les\u00a0<b>substances<\/b>\u00a0<b>nutritives<\/b>\u00a0essentielles afin de compenser les \u00e9ventuelles\u00a0<b>carences<\/b>\u00a0de votre espace de culture. Les carences en\u00a0<b>zinc<\/b>\u00a0ou en\u00a0<b>phosphore<\/b> sont les plus r\u00e9pandues et les plus combattues. Par cons\u00e9quent les engrais <b>NPK<\/b> veillent \u00e0 r\u00e9\u00e9quilibrer la nature de certains sols, souvent trop acides.<\/p>\n<p class=\"p1\">Si vous utilisez un engrais contenant du\u00a0<b>phosphore<\/b>, il est pr\u00e9f\u00e9rable de le r\u00e9pandre avant les\u00a0<b>semis<\/b>\u00a0afin que votre plante puisse profiter de tous ses effets b\u00e9n\u00e9fiques durant la culture. Un engrais \u00e0 base d\u2019azote vous sera tr\u00e8s utile lors des tallages et de la p\u00e9riode de montaison.<\/p>\n<h2>Quelques exemples<\/h2>\n<p class=\"p1\">Tous ces calculs vous angoissent ? N\u2019ayez crainte ! Voici un tableau des principaux engrais\u00a0<b>NPK<\/b>\u00a0\u00e0 utiliser selon les esp\u00e8ces v\u00e9g\u00e9tales choisies.<\/p>\n<table class=\"t1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p3\"><b>Type de plantes<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p3\"><b>Engrais NPK conseill\u00e9<\/b><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\"><b>Pieds de tomates<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\">NPK 10-11-18<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\"><b>Plantes vertes<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\">NPK 4-3-2<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\"><b>Orchid\u00e9es<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\">NPK 5-5-5<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\"><b>Agrumes et plantes de balcon<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\">NPK 5-4-7 \/ NPK 17-7-27<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\"><b>Arbres fruitiers<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\">NPK 10-8-17<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\"><b>Cactus<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\">NPK 4-5-6<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\"><b>Jardini\u00e8res<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\">NPK 4-6-7 \/ NPK 9-14-28<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\"><b>Foug\u00e8res et gramin\u00e9es<\/b><\/p>\n<\/td>\n<td class=\"td1\" valign=\"top\">\n<p class=\"p1\">NPK 10-5-5<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"p1\">Retrouvez tous<a href=\"https:\/\/legrowshop.com\/79-engrais\"><span class=\"s1\">\u00a0<span style=\"text-decoration: underline;\">nos engrais<\/span><\/span><\/a>\u00a0sur le site ! Sur chaque fiche produit d&rsquo;engrais, vous pouvez retrouver le\u00a0<b>NPK<\/b> dans la description en bas de la fiche. Ainsi, vous pourrez <b>savoir ce dont vos plantes vont b\u00e9n\u00e9ficier.<\/b>\u00a0Pour toutes informations compl\u00e9mentaires, n&rsquo;h\u00e9sitez pas \u00e0 nous contacter via le formulaire de contact ou par email sur contact@legrowshop.com<\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Temps de lecture\u00a0: <\/span> <span class=\"rt-time\">3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span> NPK, ces trois lettres pr\u00e9sentes sur vos engrais restent un total myst\u00e8re? L&rsquo;\u00e9quipe Growshop vous explique ce qu&rsquo;est le NPK, comment comprendre les informations disponibles sur les \u00e9tiquettes des produits, que repr\u00e9sentent les valeurs et quels sont les diff\u00e9rents types d&rsquo;engrais.<\/p>\n","protected":false},"author":3,"featured_media":73,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ub_ctt_via":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1,7],"tags":[],"class_list":["post-72","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conseils","category-tout-savoir-sur-les-engrais"],"featured_image_src":"https:\/\/legrowshop.com\/blog\/wp-content\/uploads\/2021\/09\/comprendre-npk.jpeg","author_info":{"display_name":"Jeanne","author_link":"https:\/\/legrowshop.com\/blog\/author\/growshop\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fertilisant NPK engrais : NPK d\u00e9finition et utilisation | Le GrowShop Urban Jungle<\/title>\n<meta name=\"description\" content=\"Vous avez s\u00fbrement eu l\u2019occasion de voir ces trois lettres sur l\u2019emballage des produits de pour vos plantes. 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