20.500.12556/DKUM-98651 Pridelek koruze (zea mays l.) po predhodno sejanem prezimnem dosevku magistrsko delo Maize (zea mays l.) yield after a sown winter cover crop V raziskavi je bil obravnavan vpliv prezimnih dosevkov mnogocvetne ljuljke (Lolium multiflorum Lam.) in inkarnatke (Trifolium incarnatum L.) na pridelek koruze (Zea mays L.) ter možnost zmanjšanja uporabe dušika iz mineralnih gnojil ob njenem gnojenju. Poljski poskusi so bili izvedeni v letih 2023 in 2024 na šestih kmetijskih gospodarstvih v Sloveniji. Prezimna dosevka sta bila posejana v dveh rokih setve. Koruza je bila gnojena z različnimi odmerki dušika iz mineralnih gnojil. Ugotovljeno je bilo, da je inkarnatka v primerjavi z mnogocvetno ljuljko akumulirala več dušika in prispevala več simbiotsko vezanega dušika. Najugodnejši učinek na pridelek silažne koruze in zrnja je bil dosežen pri koruzi sejani po inkarnatki ob uporabi polovičnega odmerka dušika iz mineralnih gnojil (107 kg N/ha). Pridelki silažne koruze in zrnja so bili primerljivi oziroma v letu 2024 višji kot pri kontroli, kjer je ob gnojenju bil uporabljen polni odmerek dušika (215 kg N/ha). Pri obravnavanjih brez dodatnega dušika iz mineralnih gnojil so bili pridelki praviloma nižji. Mnogocvetna ljuljka je učinkovito izkoriščala preostali mineralni dušik v tleh, vendar njen vpliv na povečanje pridelka ni bil izrazit. Rezultati potrjujejo, da se z vključevanjem inkarnatke v kolobar uporaba dušika iz mineralnih gnojil zmanjša brez negativnega vpliva na pridelek koruze. The study investigated the effect of winter cover crops, namely Italian ryegrass (Lolium multiflorum Lam.) and crimson clover (Trifolium incarnatum L.), on maize (Zea mays L.) yield, as well as the possibility of reducing the application of nitrogen from mineral fertilisers in maize fertilisation. Field trials were conducted in 2023 and 2024 on six agricultural holdings in Slovenia. The two winter cover crops were sown at two different sowing dates, while maize was fertilised with different rates of nitrogen from mineral fertilisers. The results indicate that crimson clover accumulated more nitrogen than Italian ryegrass and contributed towards a greater amount of symbiotically fixed nitrogen. The most favourable effect on silage maize and grain yield was achieved when maize was sown after crimson clover and fertilised with half the rate of mineral nitrogen fertiliser (107 kg N/ha). Silage maize and grain yields were comparable to, and in 2024 higher than, those of the control treatment in which the full rate of nitrogen fertiliser was applied (215 kg N/ha). In treatments without additional nitrogen from mineral fertilisers, yields were generally lower. Italian ryegrass effectively utilised the residual mineral nitrogen in the soil; however, its effect on increasing maize yield was not significant. The results of this study concurred that the inclusion of crimson clover in the crop rotation can reduce the use of nitrogen from mineral fertilisers without negatively affecting maize yield. inkarnatka mnogocvetna ljuljka dušik koruza prezimni dosevek crimson clover Italian ryegrass nitrogen maize winter cover crop true true false M. Bračko Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-06-29 08:17:07 2026-07-29 13:45:26 2026-07-30 03:09:41 0000-00-00 00:00:00 2026 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (VIII, 35, [2] str.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 633.15:631.524.84:633.2:546.17(043)=163.6 286359555 MAG_Bracko_Matic_2026.pdf MAG_Bracko_Matic_2026.pdf 1 74E5BF2CC9A5D22092E05101B5CDDA5F cbb574ca3997e51389ccc465b7b8449f59f0d5b3dc20c72ab20f124a231802c4 7afadc29-7389-11f1-a1c0-00155d580e34 https://dk.um.si/Dokument.php?lang=slv&id=207666 Fakulteta za kmetijstvo in biosistemske vede 0 0 0