{"id":5032,"date":"2022-08-02T10:15:46","date_gmt":"2022-08-02T08:15:46","guid":{"rendered":"https:\/\/legrowshop.com\/blog\/?p=5032"},"modified":"2022-12-02T16:11:35","modified_gmt":"2022-12-02T15:11:35","slug":"le-spectre-lumineux","status":"publish","type":"post","link":"https:\/\/legrowshop.com\/blog\/le-spectre-lumineux\/","title":{"rendered":"Le spectre lumineux en culture en int\u00e9rieur"},"content":{"rendered":"Temps de lecture\u00a0: <\/span> 4<\/span> minutes<\/span><\/span>

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Si vous cultivez depuis quelques temps, vous connaissez le r\u00f4le primordial de la lumi\u00e8re dans le processus photosynth\u00e9tique<\/a> de la plante. Indispensable \u00e0 son d\u00e9veloppement, conna\u00eetre sur le bout des doigts le spectre lumineux et ses sp\u00e9cificit\u00e9s permet \u00e9galement de moduler \u00e0 votre convenance le cycle de culture. Dans l\u2019optique de toujours obtenir plus de rendement et un produit final d\u2019une qualit\u00e9 sup\u00e9rieure, l\u2019usage des UV et plus sp\u00e9cifiquement les UVB est une piste int\u00e9ressante \u00e0 explorer pour am\u00e9liorer sa plantation.<\/span><\/p>\n

Le spectre lumineux, keskec\u00e9 ?<\/span><\/h2>\n

Commen\u00e7ons par r\u00e9viser les bases, le spectre lumineux, qu\u2019est-ce-que c\u2019est exactement ? Parmi les radiations solaires, on retrouve les rayons gamma, les rayons X, les ondes radio, les ultraviolets (UV-A, UV-B et UV-C) et enfin la lumi\u00e8re visible<\/strong>. Cette derni\u00e8re est, comme son nom l\u2019indique, visible \u00e0 l’\u0153il nu. Il s\u2019agit en fait de la lumi\u00e8re qui perce la couche d\u2019ozone et permet ainsi d\u2019offrir des conditions propices, notamment aux v\u00e9g\u00e9taux. Ce spectre lumineux (ou spectre visible) est cat\u00e9goris\u00e9 en ce qu\u2019on appelle des longueurs d\u2019ondes<\/strong>. Mesur\u00e9 en nanom\u00e8tres (nm) et compris entre 380 et 750 nm<\/strong>, le spectre lumineux se divise en couleur (celle de l\u2019arc-en-ciel, allez on est certain que vous l\u2019avez d\u00e9j\u00e0 vu en cours de SVT). Quand vous souhaitez vous procurer une lampe horticole pour votre installation, le spectre lumineux est donc indiqu\u00e9 par sa mesure nanom\u00e9trique et l\u2019intensit\u00e9 lumineuse, elle, est traduite en Kelvin<\/a>. Voil\u00e0 un petit r\u00e9capitulatif des couleurs et de leur traduction en nanom\u00e8tre.<\/span><\/p>\n

Rouge :<\/span><\/strong> 620 – 750<\/span><\/p>\n

Orange :<\/span><\/strong> 590 – 620 nm<\/span><\/p>\n

Jaune :<\/span> <\/strong>565 – 590 nm<\/span><\/p>\n

Vert : <\/span><\/strong>520 – 564 nm<\/span><\/p>\n

Cyan :<\/span> <\/strong>500 – 520 nm<\/span><\/p>\n

Bleu :<\/span><\/strong> 430 – 500 nm<\/span><\/p>\n

Violet :<\/span><\/strong> 380 – 430 nm<\/span><\/p>\n

Le spectre lumineux adapt\u00e9 \u00e0 votre culture<\/span><\/h2>\n

Passons maintenant \u00e0 ce qui nous int\u00e9resse le plus, c’est-\u00e0-dire comment adapter au mieux le spectre lumineux<\/strong> en culture en int\u00e9rieur. Aussi puissantes que soient les lampes horticoles<\/a>, il est \u00e9vident qu\u2019elles ne peuvent pas rivaliser avec le soleil<\/strong> lui-m\u00eame. Cependant, si vous adaptez correctement le spectre lumineux \u00e0 chaque phase de croissance de vos plantes, vous maximisez vos chances d\u2019obtenir une r\u00e9colte abondante et de qualit\u00e9.\u00a0<\/span><\/p>\n

Pour les plantules<\/span><\/h3>\n

Le d\u00e9marrage de ses plants n\u2019est pas une \u00e9tape \u00e0 prendre \u00e0 la l\u00e9g\u00e8re. Plus les plantules seront robustes, plus vos plantes auront de chances de r\u00e9sister aux pathog\u00e8nes et aux nuisibles<\/strong>. Respecter les besoins en lumi\u00e8re des petits plants est donc tr\u00e8s important pour pouvoir poursuivre votre culture sereinement. Pour bien se d\u00e9velopper, les plantules ont besoin d\u2019un spectre lumineux pas trop chaud. Une ampoule CFL<\/a> est donc id\u00e9ale pour cette phase.<\/span><\/p>\n

Pour la phase v\u00e9g\u00e9tative<\/span><\/h3>\n

Cruciale pour obtenir des fleurs en abondance, la phase v\u00e9g\u00e9tative occupe \u00e9galement une place importante dans le cycle de culture. Une plante qui n\u2019a pas v\u00e9g\u00e9t\u00e9 assez longtemps ou dans de mauvaises conditions, n’atteindra pas son plein potentiel. Cela se r\u00e9percute donc sur la r\u00e9colte qui sera, sans surprise, plus maigre qu\u2019esp\u00e9r\u00e9e. On \u00e9claire couramment la plante sous une lumi\u00e8re bleue<\/strong> durant la phase de v\u00e9g\u00e9tation (entre 400 et 500 nm, 460 \u00e9tant consid\u00e9r\u00e9 comme le spectre id\u00e9al).<\/span><\/p>\n

Tips :<\/b> le spectre lumineux reproduit la lumi\u00e8re naturelle du soleil<\/strong>, il est donc logique de commencer par un spectre plus froid et de progressivement tendre vers une lumi\u00e8re plus chaude. En effet, au printemps, la lumi\u00e8re du soleil est plus froide qu\u2019elle ne l\u2019est en \u00e9t\u00e9.<\/span><\/p>\n

Vous pouvez \u00e9galement choisir de priver vos plantes de lumi\u00e8re bleue pendant la phase v\u00e9g\u00e9tative. Cela obligera vos plants \u00e0 se mettre en concurrence pour chercher la lumi\u00e8re et les encouragera donc \u00e0 s\u2019\u00e9tirer. Chaque cultivateur poss\u00e8de sa propre mani\u00e8re de faire. Si vous d\u00e9butez dans la culture en int\u00e9rieur, il est pertinent de suivre la m\u00e9thode traditionnelle. Cela vous permettra de vous familiariser avec l\u2019\u00e9clairage horticole.\u00a0<\/span><\/p>\n

Pour la phase de floraison<\/span><\/h3>\n

On ne peut qu’imaginer votre joie et votre fiert\u00e9 quand vous arrivez enfin \u00e0 la tant attendue phase de floraison ! Le Graal pour plus d\u2019un cultivateur, la floraison, ultime \u00e9tape avant la r\u00e9colte, demande \u00e9galement une attention particuli\u00e8re en mati\u00e8re d\u2019\u00e9clairage. C\u2019est au cours de cette phase que vos prot\u00e9g\u00e9s vont d\u00e9velopper leurs ar\u00f4mes et la puissance<\/strong> de leurs fleurs. Si on avait affaire \u00e0 un bon vin, on parlerait d\u2019affinage. Comme nous vous l\u2019avons r\u00e9v\u00e9l\u00e9 un peu plus haut, le spectre lumineux suit le m\u00eame cycle que les saisons. Dans la nature, les plantes entrent en phase de floraison \u00e0 la fin du printemps et au d\u00e9but de l\u2019\u00e9t\u00e9. Les journ\u00e9es s’allongent, les plantes b\u00e9n\u00e9ficient donc de plus de temps expos\u00e9es au soleil et d\u2019un spectre lumineux plus chaud<\/strong>. La lumi\u00e8re rouge est donc id\u00e9ale pour mener \u00e0 bien la phase de floraison. Une lampe comprise en 620 et 780 mn vous donnera d\u2019excellents r\u00e9sultats.<\/span><\/p>\n

L\u2019impact des UV sur les plantes<\/span><\/h2>\n

Certes, les UV sont invisibles \u00e0 l’\u0153il nu, mais ils ne sont pas moins n\u00e9cessaires au d\u00e9veloppement des plantes. S\u2019il n’est pas obligatoire de les int\u00e9grer dans la gestion de son \u00e9clairage, ils peuvent quand m\u00eame repr\u00e9senter une opportunit\u00e9 pour obtenir une r\u00e9colte abondante.<\/span><\/p>\n

Fr\u00e9quemment utilis\u00e9s chez les cultivateurs aguerris, les UV (plus souvent les UV-B), influent positivement sur la production de sucre des fleurs. Ainsi, exposer ses plantes aux rayons ultraviolets gr\u00e2ce aux barres LED,<\/strong> ne pourra qu\u2019\u00eatre b\u00e9n\u00e9fique pour le go\u00fbt et la production de sucre de votre culture. G\u00e9n\u00e9ralement, l\u2019usage d\u2019UV s\u2019introduit pendant la phase de floraison (les deux ou trois premi\u00e8res semaines). N\u00e9anmoins, il n\u2019est pas exclu d\u2019en user \u00e9galement pendant la phase v\u00e9g\u00e9tative. Attention tout de m\u00eame, l’usage des UV ne doit pas excessif, cela risquerait de stresser vos plantes.<\/span><\/p>\n

La s\u00e9lection du Growshop<\/h2>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/6″][vc_single_image image=\u00a0\u00bb5039″ img_size=\u00a0\u00bb200×200″ add_caption=\u00a0\u00bbyes\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb onclick=\u00a0\u00bbcustom_link\u00a0\u00bb img_link_target=\u00a0\u00bb_blank\u00a0\u00bb link=\u00a0\u00bbhttps:\/\/legrowshop.com\/led\/868-panneau-led-horticole-attis-200w-2-3-mmolj-lumatek-5060560030843.html\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/6″][vc_single_image image=\u00a0\u00bb5038″ img_size=\u00a0\u00bb200×200″ add_caption=\u00a0\u00bbyes\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb onclick=\u00a0\u00bbcustom_link\u00a0\u00bb img_link_target=\u00a0\u00bb_blank\u00a0\u00bb link=\u00a0\u00bbhttps:\/\/legrowshop.com\/led\/1085-barre-led-28w-ultraviolet-85cm-supernova-lighting-3701503502479.html?fast_search=fs\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/6″][vc_single_image image=\u00a0\u00bb5041″ img_size=\u00a0\u00bb200×200″ add_caption=\u00a0\u00bbyes\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb onclick=\u00a0\u00bbcustom_link\u00a0\u00bb img_link_target=\u00a0\u00bb_blank\u00a0\u00bb link=\u00a0\u00bbhttps:\/\/legrowshop.com\/led\/2958-panneau-led-horticole-q150w-pure-led-3870000362258.html\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/6″][vc_single_image image=\u00a0\u00bb5040″ img_size=\u00a0\u00bb200×200″ add_caption=\u00a0\u00bbyes\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb onclick=\u00a0\u00bbcustom_link\u00a0\u00bb img_link_target=\u00a0\u00bb_blank\u00a0\u00bb link=\u00a0\u00bbhttps:\/\/legrowshop.com\/eclairage\/380-led-cob-f2-v2-600w-supernova-lighting-3701503502448.html\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/6″][\/vc_column][vc_column width=\u00a0\u00bb1\/6″][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"

Temps de lecture\u00a0: <\/span> 4<\/span> minutes<\/span><\/span> Base essentielle de la r\u00e9ussite d\u2019une culture, le substrat est presque aussi important que l\u2019eau. Si vous trouverez facilement de tr\u00e8s bons mix dans le commerce, il est \u00e9galement int\u00e9ressant de fabriquer son propre m\u00e9lange. Cela vous en apprendra \u00a0beaucoup sur les besoins des plantes. C’est \u00e9galement la meilleure mani\u00e8re de r\u00e9pondre au mieux \u00e0 leurs besoins.\u00a0<\/p>\n","protected":false},"author":3,"featured_media":5033,"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":[1,5],"tags":[],"class_list":["post-5032","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conseils","category-tout-savoir-sur-leclairage-horticole"],"featured_image_src":"https:\/\/legrowshop.com\/blog\/wp-content\/uploads\/2022\/08\/Banniere-spectre-lumineux.png","author_info":{"display_name":"Jeanne","author_link":"https:\/\/legrowshop.com\/blog\/author\/growshop\/"},"yoast_head":"\nLe spectre lumineux en culture en int\u00e9rieur — Blog GrowShop<\/title>\n<meta name=\"description\" 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de lecture\u00a0: 4 minutes Base essentielle de la r\u00e9ussite d\u2019une culture, le substrat est presque aussi important que l\u2019eau. Si vous trouverez facilement de tr\u00e8s bons mix dans le commerce, il est \u00e9galement int\u00e9ressant de fabriquer son propre m\u00e9lange. Cela vous en apprendra \u00a0beaucoup sur les besoins des plantes. 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