20.500.12556/DKUM-81395 Vpliv biostimulatorjev na rast in razvoj čebule (Alium cepa l.) ter na stopnjo napada bolezni in škodljivcev Effect of Biostimulants on the Growth, Development, Disease and Pests Attack Rate in Onions (Alium cepa L.) Leta 2020 smo izvedli poljski poskus uporabe biostimulatorjev na kultivarjih čebule 'Talon F1' in 'Ptujska rdeča'. V rastni sezoni smo dvakrat nanesli biostimulatorja Bombardier® (v BBCH 14 in 18) in Batallon® (v BBCH 40 in 45). Po EPPO-standardu smo ocenjevali delež poškodovane listne površine zaradi gliv in število resarjev na površini lista. Analizirali smo število razvitih listov in merili višino rastlin. Višino pridelka smo analizirali z ločevanjem okuženih čebul od zdravih, tehtanjem in merjenjem premera naključno izbranih čebul. Izračunali smo število čebul na kvadratni meter in povprečno maso čebule. V laboratoriju smo izvedli meritev količine suhe snovi (°Brix). Narejen je bil tudi preprost ekonomski izračun smiselnosti uporabe biostimulatorjev. Rezultati so pokazali, da se je pri hibridu 'Talon F1' zdrav pridelek 1. razreda pri uporabi biostimulatorjev povečal s 46.870 kg/ha na 52.583 kg/ha. Pri sorti 'Ptujska rdeča' se je zdrav pridelek 1. razreda povečal s 14.438 kg/ha na 21.265 kg/ha. Uporaba biostimulatorjev je proti koncu sezone značilno zmanjšala stopnjo okužbe s čebulno plesnijo pri hibridu 'Talon F1', stopnja okužbe z rjavo pegavostjo listov pa se je značilno zmanjšala pri obeh kultivarjih. Sezono 2020 je zaznamovalo vlažno poletje, zato bi bilo za bolj natančne rezultate potrebno raziskavo narediti v več sezonah. Ob upoštevanju prodajnih cen čebule je povečanje prihodka ob uporabi biostimulatorja veliko višje od stroškov z biostimulatorjem in nanosom. Sklepamo, da se uporaba biostimulatorja obrestuje in pokaže pozitivne učinke. V našem primeru smo z njimi uspeli rešiti skoraj dve tretjini pridelka v posevku čebule, močno poškodovanem zaradi herbicidov. In 2020, a field experiment was conducted using biostimulants on the two onion cultivars ‘Talon F1’ and ‘Ptujska rdeča’. During the growing season the biostimulants Bombardier® (in BBCH 14 and 18) and Batallon® (in BBCH 40 and 45) were applied twice. According to the EPPO standard, damaged leaf surface due to fungal disease was estimated and the number of thrips. The number of developed leaves was analysed and the plant height was measured. The yield was analysed by separating infected onions from healthy ones, then weighing and measuring the diameter on randomly selected onions. We calculated the number of onions per square meter and the average weight of onions. The amount of dry matter (°Brix) was measured in the laboratory. A simple economic calculation of the feasibility of using biostimulants was also made. The results showed that in the ‘Talon F1’ hybrid, the healthy yield of 1st class increased from 46.870 kg/ha to 52.583 kg/ha when using biostimulants. In the ‘Ptujska rdeča’ variety, the healthy yield of the 1st class increased from 14.438 kg/ha to 21.265 kg/ha. At the end of the growing season, the use of biostimulants significantly reduced the rate of downy mildew infection in the ‘Talon F1’ hybrid and the rate of brown leaf blight infection significantly decreased in both cultivars. The 2020 growing season had a humid summer, so the research would need to be done in several seasons for more accurate results. Considering the selling prices of onions, the increase in revenue when using biostimulants is much higher than the cost of biostimulants and their application. The results indicate that the use of biostimulants pays off and shows positive effects. In this case, we managed to save almost two thirds of the yield in the onion crop severely damaged by the herbicides. čebula biostimulatorji herbicid škodljivi organizmi pridelek onion biostimulants herbicide pathogens yield true true false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2022-03-15 14:09:36 2022-04-04 15:12:01 2022-08-10 00:25:05 0000-00-00 00:00:00 2022 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 102501123 MAG_Lednik_Matija_2022.pdf MAG_Lednik_Matija_2022.pdf 1 225781115D1A47D315E138743C497802 3eb27ee1a79d04d046ccf3984ad5eca6d08cee73373891f9974e2ec93d8b7216 40f3ac1a-a467-11ec-9781-00155d000105 20.500.12556/dkum/813f0dfe-f104-4755-9f7a-7bcee0b3e73f https://dk.um.si/Dokument.php?lang=slv&id=156857 Fakulteta za kmetijstvo in biosistemske vede 0 0 0