{"id":873,"date":"2026-03-25T14:42:14","date_gmt":"2026-03-25T14:42:14","guid":{"rendered":"https:\/\/rastosvet.rs\/?p=873"},"modified":"2026-03-26T19:35:08","modified_gmt":"2026-03-26T19:35:08","slug":"vestacko-svetlo-za-biljke-sta-treba-da-znate","status":"publish","type":"post","link":"https:\/\/rastosvet.rs\/sr-latin\/2026\/03\/25\/vestacko-svetlo-za-biljke-sta-treba-da-znate\/","title":{"rendered":"Ve\u0161ta\u010dko svetlo za biljke: \u0161ta treba da znate"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Koji su izvori ve\u0161ta\u010dkog svetla za biljke? Koliko svetlosti treba? Kako izmeriti koli\u010dinu svetlosti?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ve\u0161ta\u010dko svetlo je odli\u010dan na\u010din za uzgoj biljaka u zatvorenom prostoru, posebno tokom zimskih meseci kada je prirodno svetlo ograni\u010deno. Ali kakvu ve\u0161ta\u010dku svetlost treba da koristite? A koliko svetlosti treba va\u0161im biljkama?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Osnove ve\u0161ta\u010dkog svetla za biljke<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Postoji mnogo razli\u010ditih izvora ve\u0161ta\u010dke svetlosti za biljke:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fluorescentna svetla<\/strong>: Nekada su bile najpopularniji izbor za ba\u0161tovanstvo u zatvorenom prostoru. One nude dobar balans crvene i plave svetlosti, a proizvode manje toplote od sijalica sa \u017earnom niti.<\/li>\n\n\n\n<li><strong>LED svetla za biljke<\/strong>: postala su sve popularnija zbog svoje energetske efikasnosti i dugog veka trajanja. Mogu se prilagoditi da emituju odre\u0111ene talasne du\u017eine svetlosti za razli\u010dite faze biljke.<\/li>\n\n\n\n<li><strong>Natrijumova svetla visokog pritiska<\/strong> (engl: High-Pressure Sodium &#8211; HPS): Obi\u010dno se koriste u komercijalnim staklenicima, ova svetla su visokog intenziteta i proizvode mnogo toplote. \u010cesto se koriste za cvetne i plodonosne biljke .<\/li>\n\n\n\n<li><strong>Metal-halidna<\/strong> (MH) svetla (engl: Metal Halide &#8211; MH): Sli\u010dna natrijumovim, ali sa ve\u0107im udelom plave svetlosti, \u0161to ih \u010dini pogodnim za vegetativni rast.<\/li>\n\n\n\n<li><strong>Sijalice sa \u017earnom niti<\/strong> (engl: Incandescent Lights): Iako nisu idealne za rast biljaka zbog niske izlazne svetlosti i velike proizvodnje toplote, mogu se koristiti kao privremeno re\u0161enje za biljke pri slabom osvetljenju.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"680\" height=\"500\" src=\"https:\/\/rastosvet.rs\/wp-content\/uploads\/2024\/08\/svetlo-potrosnja.png?v=1723149127\" alt=\"\" class=\"wp-image-874\" srcset=\"https:\/\/rastosvet.rs\/wp-content\/uploads\/2024\/08\/svetlo-potrosnja.png?v=1723149127 680w, https:\/\/rastosvet.rs\/wp-content\/uploads\/2024\/08\/svetlo-potrosnja-300x221.png?v=1723149127 300w, https:\/\/rastosvet.rs\/wp-content\/uploads\/2024\/08\/svetlo-potrosnja-600x441.png?v=1723149127 600w\" sizes=\"(max-width: 680px) 100vw, 680px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Koliko svetlosti treba va\u0161im biljkama?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Koli\u010dina svetlosti koja je potrebna va\u0161im biljkama zavisi\u0107e od vrste biljke. Neke biljke, kao \u0161to su zelena salata i spana\u0107, mogu da uspevaju sa niskim nivoom svetlosti. Drugim biljkama, kao \u0161to su paradajz i paprika, treba vi\u0161e svetlosti da bi rasle i dale plodove.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kako postaviti svetlo za biljke?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Najbolji na\u010din da odredite koliko svetlosti treba va\u0161im biljkama je da konsultujete vodi\u010d za negu biljaka (npr. <a href=\"https:\/\/rastosvet.rs\/2024\/08\/08\/katalog-potreba-biljaka\/\">Katalog potreba biljaka<\/a>) ili da to utvrdite eksperimetalno:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Postavite svoje biljke relativno blizu izvoru svetlosti.<\/li>\n\n\n\n<li>Uklju\u010dite svetlo na 12-16 sati dnevno.<\/li>\n\n\n\n<li>Redovno rotirajte svoje biljke, ili samo svetlo, tako da svi listovi dobijaju jednaku koli\u010dinu svetlosti.<\/li>\n\n\n\n<li>Posmatrajte pona\u0161anje va\u0161e biljke:\n<ul class=\"wp-block-list\">\n<li>ako listovi \u017eute, fali joj svetla,<\/li>\n\n\n\n<li>ako se listovi su\u0161e, ima vi\u0161ka svetlosti.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Poku\u0161ajte da udaljite ili pribli\u017eite izvor svetlosti, zavisno od pona\u0161anja biljke.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tako\u0111e, intenzitet svetlosti se mo\u017ee odrediti i merenjem\u2026<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Koliko izmeriti koli\u010dinu svetlosti svetlosti za biljke?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Koristi se nekoliko termina da bi se do\u0161lo do odgovora na ovo pitanje. Prvo da defini\u0161emo <strong>mol<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>mol (mol) je jedinica mere za veoma malu koli\u010dinu fotona,<\/li>\n\n\n\n<li>1\u00b5mol je pribli\u017eno jednak 6&#215;10^17 fotona, pri tome<\/li>\n\n\n\n<li>fotoni su osnovne \u010destice svetlosti i svih drugih oblika elektromagnetnog zra\u010denja.<\/li>\n\n\n\n<li>to su \u010destice bez mase koje putuju brzinom svetlosti.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">PAR &#8211; korisni opseg svetlosti<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Opseg svetlosnih talasnih du\u017eina (400-700 nanometara) koje biljke koriste za fotosintezu.<\/li>\n\n\n\n<li>To je spektar, a ne specifi\u010dno merenje.<\/li>\n\n\n\n<li>engl: <em>Photosynthetically Active Radiation &#8211; PAR<\/em><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">PPF &#8211; emitovana koli\u010dina svetlosti<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ukupan broj fotona koje emituje izvor svetlosti u sekundi.<\/li>\n\n\n\n<li>Jedinica mere: mikromoli u sekundi (\u00b5mol\/s)<\/li>\n\n\n\n<li>Predstavlja ukupnu koli\u010dinu svetlosti koju proizvodi izvor svetlosti.<\/li>\n\n\n\n<li>engl: <em>Photosynthetic Photon Flux &#8211; PPF<\/em><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">PPFD &#8211; primljena koli\u010dina svetlosti<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gustina fotona koja pada na odre\u0111enu povr\u0161inu u sekundi.<\/li>\n\n\n\n<li>Jedinica mere: mikromoli po kvadratnom metru u sekundi (\u00b5mol\/m\u00b2\/s).<\/li>\n\n\n\n<li>Predstavlja koli\u010dinu svetlosti koja dospeva na biljku u sekundi.<\/li>\n\n\n\n<li>engl: <em>Photosynthetic Photon Flux Density &#8211; PPFD<\/em><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">DLI &#8211; primljena koli\u010dina svetlosti tokom dana<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ukupna koli\u010dina svetlosti isporu\u010dena biljci tokom perioda od 24 sata.<\/li>\n\n\n\n<li>Jedinica mere: mikromoli po kvadratnom metru u danu (\u00b5mol\/m\u00b2\/day).<\/li>\n\n\n\n<li>Predstavlja koli\u010dinu svetlosti koja dospeva na biljku tokom jednog dana.<\/li>\n\n\n\n<li>Skoro isto \u0161to i PPFD, ali sumarno, na nivou dana.<\/li>\n\n\n\n<li>engl: <em>Daily Light Integral &#8211; DLI<\/em><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Klju\u010dne razlike izme\u0111u PAR, PPF, PPFD i DLI:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PAR je kao vrsta hrane (svetla) za biljke, opeseg svetlosti koji biljka mo\u017ee da konzumira.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PPF je kao koli\u010dina hrane (svetla) na raspolaganju &#8211; ono \u0161to izvor emituje.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PPFD je kao koli\u010dina hrane (svetla) koja sti\u017ee do tanjira (do lista biljki) &#8211; ono \u0161to sti\u017ee do biljke svake sekunde.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DLI je kao koli\u010dina hrane (svetla) koja sti\u017ee do usta (do lista biljki) &#8211; ono \u0161to sti\u017ee do biljke tokom dana.<\/p>\n\n\n\n<p class=\"has-background wp-block-paragraph\" style=\"background:linear-gradient(170deg,rgb(141,184,221) 0%,rgb(185,146,221) 100%)\"><strong>PPFD i DLI<\/strong> su najva\u017eniji za uzgajiva\u010de jer direktno uti\u010du na rast biljaka. Omogu\u0107ava merenje rasporeda svetlosti i optimizaciju postavke svetlosnih izvora.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PAR metar<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PAR metar je ure\u0111aj koji se koristi za merenje intenziteta svetlosti unutar spektra koji je bitan za biljke. Ovaj spektar, u rasponu od 400 do 700 nanometara, je svetlost koju biljke koriste za fotosintezu (<a href=\"https:\/\/rastosvet.rs\/2024\/08\/08\/svetlostni-spektri-svetlost-za-biljke\/\">Svetlostni spektri: svetlost za biljke<\/a>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Klju\u010dne funkcije PAR metra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Merenje intenziteta svetlosti<\/strong> &#8211; PPDF (\u00b5mol\/m\u00b2\/s).<\/li>\n\n\n\n<li><strong>Odre\u0111ivanje udaljenosti svetla<\/strong> &#8211; gde postaviti svetlostni izvor.<\/li>\n\n\n\n<li><strong>Pra\u0107enje nivoa svetlosti<\/strong> &#8211; ukoliko je potrebno menjati intenzitet tokom dana.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Koriste\u0107i PAR metar mogu\u0107e je precizno pozicinirati svetlostni izvor na potrebnoj udaljenosi od biljke. Ve\u0107ina PAR metara meri samo PPFD, jer je momentalno &#8211; na nivou sekunde. Struge strane, DLI merenje zahtera kontinualno merenje tokom vi\u0161e dana.<\/p>\n\n\n\n<p class=\"has-background wp-block-paragraph\" style=\"background:linear-gradient(135deg,rgb(141,184,221) 0%,rgb(185,146,221) 100%)\">\u0160to je svetlostni izvor dalji od biljke, manja koli\u010dina svetlosti sti\u017ee do biljke.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Napomena: Najbolji izvor svetlosti za va\u0161e biljke zavisi\u0107e od vrste biljke, faze njenog rasta i raspolo\u017eivog prostora. Tako\u0111e je va\u017eno uzeti u obzir faktore kao \u0161to su energetska efikasnost, izlaz toplote i cena kada birate izvor svetlosti.<\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">Izvori:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/journals.ashs.org\/hortsci\/view\/journals\/hortsci\/58\/2\/article-p180.xml\">LED Lighting: A Grower\u2019s Guide to Light Spectra<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/lightsciencetech.com\/what-are-par-ppf-and-ppfd-and-why-should-you-care\/\">What are PAR, PPF and PPFD, and why should you care?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.energy.gov\/science\/doe-explainsphotons#:~:text=Photons%20are%20the%20smallest%20possible,smallest%20possible%20particles%20of%20light.\">DOE Explains\u2026Photons<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Koji su izvori ve\u0161ta\u010dkog svetla za biljke? Koliko svetlosti treba? Kako izmeriti koli\u010dinu svetlosti?<\/p>\n","protected":false},"author":1,"featured_media":2211,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[47],"tags":[58,59],"class_list":["post-873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biljke","tag-plava","tag-crvena"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ve\u0161ta\u010dko svetlo za biljke: \u0161ta treba da znate<\/title>\n<meta name=\"description\" content=\"\u0421\u0430\u0437\u043d\u0430\u0458\u0442\u0435 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