{"id":10206,"date":"2026-02-01T23:48:24","date_gmt":"2026-02-01T23:48:24","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=10206"},"modified":"2026-02-01T23:48:24","modified_gmt":"2026-02-01T23:48:24","slug":"tomato-ripening-troubleshooting","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/botany\/tomato-ripening-troubleshooting\/","title":{"rendered":"7 d\u016fvod\u016f, pro\u010d m\u00e1 raj\u010data z\u016fst\u00e1vaj\u00ed zelen\u00e1 \u2013 a jak je rychle do\u010dervena"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Pro\u010d moje raj\u010data ne\u010dervenaj\u00ed? 7 mo\u017en\u00fdch d\u016fvod\u016f<\/h2>\n\n<h2 class=\"wp-block-heading\">Pochopen\u00ed zr\u00e1n\u00ed raj\u010dat<\/h2>\n\n<p>Kdy\u017e raj\u010data dos\u00e1hnou pln\u00e9 zelen\u00e9 velikosti, za\u010d\u00edn\u00e1 proces zr\u00e1n\u00ed, p\u0159i kter\u00e9m se tvo\u0159\u00ed lykopen \u2013 pigment, kter\u00fd jim dod\u00e1v\u00e1 \u010dervenou barvu. Tento proces spou\u0161t\u00ed p\u0159irozen\u00fd hormon zvan\u00fd ethylen.<\/p>\n\n<h2 class=\"wp-block-heading\">Teplota<\/h2>\n\n<p>Teplota hraje kl\u00ed\u010dovou roli v dozr\u00e1v\u00e1n\u00ed raj\u010dat. Ide\u00e1ln\u00ed teplota se pohybuje mezi 20 a 25 \u00b0C. Teploty nad 29 \u00b0C brzd\u00ed tvorbu lykopenu, \u010d\u00edm\u017e zpomaluj\u00ed nebo dokonce zastavuj\u00ed zr\u00e1n\u00ed. Naopak teploty pod 15 \u00b0C mohou zr\u00e1n\u00ed tak\u00e9 odd\u00e1lit.<\/p>\n\n<h2 class=\"wp-block-heading\">Slune\u010dn\u00ed sv\u011btlo<\/h2>\n\n<p>Raj\u010data sice pot\u0159ebuj\u00ed ke sv\u00e9mu r\u016fstu slune\u010dn\u00ed sv\u011btlo, ale p\u0159\u00edli\u0161 p\u0159\u00edm\u00e9ho slunce m\u016f\u017ee zr\u00e1n\u00ed brzdit. Teplo vznikaj\u00edc\u00ed intenzivn\u00edm slune\u010dn\u00edm z\u00e1\u0159en\u00edm m\u016f\u017ee zv\u00fd\u0161it teplotu na \u00farove\u0148, kter\u00e1 inhibuje produkci lykopenu. Odstra\u0148ov\u00e1n\u00ed list\u016f kolem zral\u00fdch plod\u016f za \u00fa\u010delem v\u011bt\u0161\u00edho osvitu m\u016f\u017ee zp\u016fsobit i sp\u00e1len\u00ed a prask\u00e1n\u00ed.<\/p>\n\n<h2 class=\"wp-block-heading\">Voda<\/h2>\n\n<p>Raj\u010data vy\u017eaduj\u00ed pravidelnou z\u00e1livku, ale nadm\u011brn\u00e1 z\u00e1livka m\u016f\u017ee zpomalit zr\u00e1n\u00ed. Jakmile plody dos\u00e1hnou pln\u00e9 velikosti, omezen\u00ed nebo p\u0159eru\u0161en\u00ed z\u00e1livky m\u016f\u017ee rostlinu \u201evystresovat\u201c a p\u0159epnout ji do re\u017eimu p\u0159e\u017eit\u00ed: energii p\u0159esm\u011bruje na zr\u00e1n\u00ed, aby vytvo\u0159ila \u017eivotaschopn\u00e1 semena.<\/p>\n\n<h2 class=\"wp-block-heading\">\u017diviny<\/h2>\n\n<p>Raj\u010data pot\u0159ebuj\u00ed vyv\u00e1\u017een\u00fd p\u0159\u00edsun \u017eivn\u00fdch l\u00e1tek, v\u010detn\u011b fosforu a drasl\u00edku, kter\u00e9 jsou nezbytn\u00e9 pro tvorbu lykopenu. Nedostatek fosforu a drasl\u00edku vede k pomal\u00e9mu nebo nerovnom\u011brn\u00e9mu zr\u00e1n\u00ed. Hnojte rostliny hnojivem s vy\u0161\u0161\u00edm obsahem fosforu (nap\u0159. NPK 5-10-5) ve chv\u00edli, kdy se objev\u00ed prvn\u00ed mal\u00e9 plody.<\/p>\n\n<h2 class=\"wp-block-heading\">Dus\u00edk<\/h2>\n\n<p>I kdy\u017e je dus\u00edk d\u016fle\u017eit\u00fd pro r\u016fst raj\u010dat, jeho nadbytek m\u016f\u017ee zr\u00e1n\u00ed br\u00e1nit. Hnojen\u00ed p\u0159\u00edpravkem s p\u0159\u00edli\u0161 vysok\u00fdm obsahem dus\u00edku p\u0159esm\u011bruje energii do r\u016fstu list\u016f a zvoln\u00ed dozr\u00e1v\u00e1n\u00ed plod\u016f. Jakmile jsou na rostlin\u011b zral\u00e9 plody, p\u0159esta\u0148te p\u0159ihnojovat a nechte p\u0159irozen\u00e9 procesy zr\u00e1n\u00ed.<\/p>\n\n<h2 class=\"wp-block-heading\">\u0158ez<\/h2>\n\n<p>Odstran\u011bn\u00edm ran\u00fdch v\u00fdhonk\u016f (tzv. \u201ep\u0159ivol\u00e1v\u00e1k\u016f\u201c) sm\u011b\u0159ujete energii rostliny k tvorb\u011b a zr\u00e1n\u00ed plod\u016f. P\u0159et\u00ed\u017een\u00e9 ke\u0159e nebo ke\u0159e s neplodn\u00fdmi v\u00fdhonky se pot\u00fdkaj\u00ed s probl\u00e9my p\u0159i vytv\u00e1\u0159en\u00ed \u010derven\u00fdch raj\u010dat. V\u010dasn\u00e9 prob\u00edrky podporuj\u00ed vy\u0161\u0161\u00ed kvalitu plod\u016f, kter\u00e9 se sn\u00e1ze a rychleji vybarv\u00ed.<\/p>\n\n<h2 class=\"wp-block-heading\">Odr\u016fda<\/h2>\n\n<p>Nezapome\u0148te, \u017ee r\u016fzn\u00e9 odr\u016fdy raj\u010dat dozr\u00e1vaj\u00ed do r\u016fzn\u00fdch barev \u2013 odst\u00edny \u010derven\u00e9, oran\u017eov\u00e9, r\u016f\u017eov\u00e9, fialov\u00e9 i prou\u017ekovan\u00e9. Pokud \u010dek\u00e1te, a\u017e se raj\u010data zbarv\u00ed do \u010dervena, zkontrolujte na s\u00e1\u010dku semen, jakou barvu m\u00e1 zral\u00fd plod dan\u00e9 odr\u016fdy.<\/p>\n\n<h2 class=\"wp-block-heading\">Dodate\u010dn\u00e9 tipy<\/h2>\n\n<p>\u2013 Na obalu semen si ov\u011b\u0159te p\u0159edpokl\u00e1danou dobu sklizn\u011b pro danou odr\u016fdu; r\u016fzn\u00e9 kultivary maj\u00ed rozd\u00edlnou d\u00e9lku vegeta\u010dn\u00edho obdob\u00ed.\n\u2013 Pln\u011b velk\u00e1 zelen\u00e1 raj\u010data lze nechat dozr\u00e1t i mimo ke\u0159 \u2013 v tepl\u00e9 m\u00edstnosti v dom\u00e1cnosti.\n\u2013 Mal\u00e9, tvrd\u00e9 a nedovyvinut\u00e9 zelen\u00e9 plody pravd\u011bpodobn\u011b nez\u010dervenaj\u00ed; kompostujte je.\n\u2013 Vyhn\u011bte se p\u0159ehnojen\u00ed \u2013 nadbytek \u017eivin m\u016f\u017ee rostlin\u00e1m u\u0161kodit.\n\u2013 Pravideln\u011b kontrolujte rostliny, zda je nepostihuj\u00ed \u0161k\u016fdci \u010di choroby, kter\u00e9 mohou ovlivnit zr\u00e1n\u00ed.\n\u2013 Skl\u00edzejte raj\u010data, kdy\u017e jsou pln\u011b zral\u00e1 a p\u0159i lehk\u00e9m stisku lehce m\u011bkk\u00e1.<\/p>","protected":false},"excerpt":{"rendered":"<p>Pro\u010d moje raj\u010data ne\u010dervenaj\u00ed? 7 mo\u017en\u00fdch d\u016fvod\u016f Pochopen\u00ed zr\u00e1n\u00ed raj\u010dat Kdy\u017e raj\u010data dos\u00e1hnou pln\u00e9 zelen\u00e9 velikosti, za\u010d\u00edn\u00e1 proces zr\u00e1n\u00ed, p\u0159i kter\u00e9m se tvo\u0159\u00ed lykopen \u2013 pigment, kter\u00fd jim dod\u00e1v\u00e1 \u010dervenou&hellip;<\/p>\n","protected":false},"author":2,"featured_media":25281,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1823],"tags":[14381,14380,10729,449,9115,14379],"class_list":["post-10206","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-botany","tag-fruit-development","tag-lycopene-production","tag-tomato-varieties","tag-plant-science","tag-gardening-tips","tag-tomato-ripening"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/10206","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=10206"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/10206\/revisions"}],"predecessor-version":[{"id":25282,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/10206\/revisions\/25282"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/25281"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=10206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=10206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=10206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}