20.500.12556/DKUM-73998 Vpliv nanosa alternativnih sredstev v nasadu čebule na stopnjo razkroja ostankov fitofarmacevtskih sredstev Impact of biostimulator application on pesticide decomposition in onions Zmanjšanje količine ostankov fitofarmacevtskih sredstev (FFS) v pridelkih je trend, ki je zaradi pritiska potrošnikov vse bolj prisoten v kmetijstvu. V letih 2016 in 2017 sta bila na Ptujskem polju v nasadu čebule izvedena dva poljska poskusa z namenom proučevanja vpliva različnih alternativnih sredstev na stopnjo razkroja ostankov FFS v čebuli. V poskusu s sredstvom RezFree® (2016) je bil v nasadu čebule izveden klasični škropilni program z vmesnimi aplikacijami testiranega pripravka. V poskusu s sredstvi EM 5™ in Naturalnie Aktywny™ (2017) je bil klasični škropilni program razširjen z dodatnimi termini aplikacije več različnih FFS, vmes so bile prav tako izvedene aplikacije testiranih alternativnih sredstev. Vzorčenje za analizo ostankov FFS je bilo opravljeno v obdobju spravila čebule. Rezultati analiz so pokazali, da imajo testirana alternativna sredstva potencial za znižanje koncentracij ostankov nekaterih FFS. Največji upad koncentracij ostankov FFS je bil opažen pri kontaktnih fungicidih in insekticidih na osnovi naravnih snovi. Manjši vpliv je bil zaznan na ostanke sistemsko in pol sistemsko delujočih FFS ter sredstev, ki se močno vežejo v rastlinske kutikule. Na ostanke herbicidov proučevana sredstva niso imela vpliva. Glede na rezultate naših poskusov lahko preizkušenim alternativnim sredstvom pripišemo potencial zmanjšanja količine ostankov FFS v pridelku. Reducing amounts of pesticide residues is increasingly present trend in agriculture caused mostly by consumer pressure. In 2016 and 2017 growing seasons two field trials in onion field near Ptuj were carried out with purpose of biostimulator impact identification on pesticide residue decomposition in onions. At trial with RezFree® (2016), a classic spraying program was used with addition of intermediate applications of tested biostimulator. At trial with biostimulators EM 5™ and Naturalnie Aktywny™ (2017), a classic spraying program was extended with additional applications of multiple different classic pesticides. There were also intermediate applications of tested biostimulators. Sampling for pesticide residue analysis was done in the harvest time. Results of pesticide residue analysis showed an unexpected potential of tested biostimulators to reduce the pesticide residues. The largest decreases of residue concentrations were observed at contact acting fungicides and insecticides based on natural substances. Smaller concentration decreases were observed at systemic and semi-systemic acting pesticides and at pesticides which strongly bond into plant cuticules. No effect was observed at herbicide residues. According to the results of our trials pesticide residue reducing properties can be attributed to the tested biostimulators. alternativna sredstva sredstva za krepitev rastlin ostanki fitofarmacevtskih sredstev RezFree® Efektivni mikroorganizmi™ čebula alternative plant protection products biostimulators pesticide residues RezFree® Effective microorganisms™ onion true true false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2019-07-16 09:53:03 2019-07-26 10:08:55 2022-08-09 07:59:04 2019-07-30 12:52:34 2019 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 URN:SI:UM:DK:J1HWOOBV MAG_Irsic_Tadej_2019.pdf MAG_Irsic_Tadej_2019.pdf 1 F8AD17949DCF5DB2ACC7FDD3416BA93F 5181acee6c4f9206b584b9a036cecad5f29c9337d84c17f185c7e13d77ae6fc3 cac1ff3f-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/0cff916a-a325-4fd6-b5f4-0172b5ecf9c8 https://dk.um.si/Dokument.php?lang=slv&id=135324 Fakulteta za kmetijstvo in biosistemske vede 0 0 0