20.500.12556/RUL-187619 Vpliv biostimulantov na rast in kakovost sadik izbranih zelenjadnic The effect of biostimulants on the growth and quality of seedlings of selected vegatables Biostimulanti so raznolike snovi, ki predstavljajo okolju prijaznejšo alternativo fitofarmacevtskim sredstvom ter izboljšujejo toleranco rastlin na stres in kakovost pridelka. Namen raziskave je bil ugotoviti vpliv biostimulantov na rast in razvoj sadik solate 'Joliac', cvetače 'Faston F1', paradižnika 'Valido' in bučk 'Tempra F1'. Poskus je potekal leta 2025 v ogrevanem rastlinjaku na laboratorijskem polju Oddelka za agronomijo Biotehniške fakultete v Ljubljani, med 17. marcem in 20. majem 2025. V poskusu so bili uporabljeni štirje biostimulanti: Amalgerol, Protifert, Biimore in Tonivit. Biostimulanti so bili naneseni dvakrat, v skladu z navodili proizvajalca, medtem ko je bila kontrola tretirana z destilirano vodo. Ob doseženi prodajni velikosti sadik smo merili njihovo višino, svežo in suho maso, SPAD vrednosti, listno površino ter premer stebla. Na podlagi teh meritev smo izračunali dodatne parametre, kot so Dicksonov indeks kakovosti (DQI), razmerje med nadzemnim in podzemnim delom (T/R), specifične listne površine (SLA), razmerje mase listov (LWR), razmerje mase korenin (RWR) in razmerje mase stebel (SWR). Rezultati so pokazali, da je odziv rastlin na biostimulante odvisen od rastlinske vrste ter uporabljenega biostimulanta. Biostimulanti so v določenih primerih statistično značilno izboljšali rastne parametre, zlasti kakovost sadik, izraženo z višjimi vrednostmi DQI in izboljšano porazdelitvijo biomase v nadzemnem in podzemnem delu sadik. Najizrazitejši pozitivni učinek je bil zaznan pri cvetači, medtem ko je bil odziv pri drugih vrstah manj izrazit ali odsoten. Na splošno rezultati potrjujejo, da biostimulanti lahko izboljšajo rast in kakovost sadik, vendar njihov učinek ni univerzalen in je odvisen od rastlinske vrste, sestave biostimulanta in načina uporabe. Biostimulants are a diverse group of substances that offer an environmentally friendly alternative to plant protection products and improve plant tolerance to stress, as well as crop quality. The aim of this study was to determine the effects of biostimulants on the growth and development of seedlings of lettuce 'Joliac', cauliflower 'Faston F1', tomato 'Valido', and courgette 'Tempra F1'. The experiment was conducted in 2025 in a heated greenhouse at the experimental field of the Department of Agronomy, Biotechnical Faculty, University of Ljubljana, from 17 March to 20 May 2025. Four biostimulants were used: Amalgerol, Protifert, Biimore, and Tonivit. The biostimulants were applied twice in accordance with the manufacturer’s instructions, while the control treatment received distilled water. When the seedlings reached marketable size, the following parameters were measured: plant height, fresh and dry weight, SPAD values, leaf area, and stem diameter. Based on these measurements, additional parameters were calculated, including the Dickson Quality Index (DQI), shoot-to-root ratio (T/R), specific leaf area (SLA), leaf weight ratio (LWR), root weight ratio (RWR), and stem weight ratio (SWR). The results showed that plant responses to biostimulants depend on both the plant species and the type of biostimulant applied. In some cases, biostimulants significantly improved growth parameters, particularly seedling quality, as indicated by higher DQI values and more favorable biomass distribution. The most pronounced positive effect was observed in cauliflower, while the response in other species was less evident or absent. Overall, the results confirm that biostimulants can enhance seedling growth and quality; however, their effects are not universal and depend on plant species, biostimulant composition, and application method. biostimulanti sadike vrtnine kakovost sadik rast razvoj biostimulants seedlings vegetables growth quality development true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-09-12 07:17:35 2026-09-12 07:17:42 2026-09-14 14:24:40 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 288655 291034627 60975.pdf 60975.pdf 1 98E55C0D45209E3F97F9B29DD569C398 1f58fa46caa11fee99a9c22e48fc646e843ad6fdef47ba0c4afb95929ca57b7b 40d4c6cc-ae69-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=247311 Biotehniška fakulteta 0 0 0