20.500.12556/DKUM-94123 Vpliv uporabe različnih dušikovih gnojil na pridelek soje diplomsko delo The effect of different nitrogen fertilizers on soybean yield V diplomskem delu je bil raziskan vpliv različnih oblik dušikovih gnojil na pridelek soje (Glycine max L.). Kljub sposobnosti soje, da s pomočjo simbiotskih bakterij Rhizobium veže atmosferski dušik, se v praksi pogosto izpostavljajo dileme glede smiselnosti dodatnega dognojevanja z dušikom. Poseben poudarek je bil namenjen primerjavi tradicionalnih gnojil (KAN, urea) in alternativnih metod prehrane rastlin, kot jih omogočajo nanognojila (nanourea 4 % in 20 %) ob različnih načinih aplikacije. Poljski poskus je bil izveden v Spodnjih Verjanah v letu 2024 po sistemu naključnih blokov s petimi obravnavanji in štirimi ponovitvami. Spremljan je bil vpliv gnojil na pridelek zrnja, vsebnost vlage ob žetvi, število koreninskih nodulov, maso rastlin, žetveni indeks ter ostanek mineralnega dušika v tleh. Statistično značilne razlike v pridelku zrnja med posameznimi načini dognojevanja niso bile ugotovljene, kar nakazuje, da dodatek dušika pri ustrezni nodulaciji ni nujno potreben. Nadalje ugotavljamo, da dognojevanje z ureo in nanognojili pridelka ni zmanjšalo v primerjavi s KAN-om, pri čemer je bil učinek delovanja nanouree ocenjen kot enakovreden klasični urei. Značilno največji žetveni indeks je bil dosežen pri uporabi foliarne aplikacije uree. Najvišje število nodulov je bilo zabeleženo pri kontrolnem obravnavanju brez dodanega dušika, kar potrjuje zaviralni učinek dodatnega dušika na simbiotsko vezavo. Raziskava potrjuje, da v optimalnih pogojih dodajanje dušika soji ni upravičeno, v razmerah, ki omejujejo vezavo zračnega dušika, pa je uporaba dušika v nanoobliki enakovredna ali celo bolj učinkovita v primerjavi z drugimi načini in oblikami dušikovih gnojil. In this thesis, the impact of different forms of nitrogen fertilizers on soybean (Glycine max L.) yield was investigated. Despite the soybean’s ability to fix atmospheric nitrogen through symbiotic Rhizobium bacteria, practical concerns often arise regarding the necessity of additional nitrogen fertilization. Special emphasis was placed on the comparison between traditional fertilizers (CAN, urea) and alternative plant nutrition strategies enabled by nanofertilizers (nano urea 4-% and 20-%) in different application methods. The field experiment was conducted in Spodnje Verjane in 2024 using a randomized block design with five treatments and four replications. The influence of fertilizers on grain yield, harvest moisture content, number of nodules, plant biomass, harvest index, and residual mineral nitrogen in the soil was monitored. No statistically significant differences in grain yield were observed among the fertilization treatments, indicating that nitrogen supplementation may not be necessary when nodulation is adequate. Furthermore, it was found that fertilization with urea and nanofertilizers did not reduce the yield compared to CAN, and the effect of nano urea was assessed as equivalent to conventional urea. The highest harvest index was achieved via a foliar application of urea. The highest number of nodules was recorded in the control treatment without added nitrogen, confirming the inhibitory effect of additional nitrogen on biological nitrogen fixation. The research confirms that under optimal conditions, nitrogen addition in soybean production is not justified. However, under conditions that limit nitrogen fixation, the use of nitrogen in nano form is equally or even more effective compared to other types and forms of nitrogen fertilizers. soja dušik nanognojila pridelek soybean nitrogen nano fertilizers yield true true false B. Družovec Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-08-04 17:48:19 2025-09-04 08:41:16 2025-09-05 03:27:06 0000-00-00 00:00:00 2025 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (VII, 38 str.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 633.34.067:631.84(043.2)=163.6 247613955 VS_Druzovec_Bine_2025.pdf VS_Druzovec_Bine_2025.pdf 1 FEA1D8AF1AA59BFC8FF590CC1B24699D 207529993c0efcdc57b5580074d7ec7a6207a7695ea6cef9648bdc81698c7445 5bb95b68-84d0-11f0-b363-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=197020 Fakulteta za kmetijstvo in biosistemske vede 0 0 0