20.500.12556/DKUM-81291 Dinamika mineralnih oblik dušika (N- min) glede na različne načine oskrbe tal v ekološkem pridelovanju zelja diplomsko delo Soil Nmin Dynsmics Influenced by Soil Management in Organic Cabbage Production Konvencionalno pridelovanje zelenjave poteka ob velikih vnosih dušika in pogosto pomeni obremenitev za okolje. V ekološki pridelavi je vnos dušika omejen, dinamika sproščanja iz tal je odvisna od vremenskih razmer, kar limitira višino pridelka. V poljskem poskusu je bila spremljana dinamika mineralnega dušika (N-min) v nitratni in amonijski obliki pred presajanjem zelja spomladi 2016, v času rastne dobe, jeseni po spravilu in naslednjo pomlad 2017 pri različnih načinih oskrbe tal: prekrivni posevki (inkarnatka in ozimni ječmen) povaljani z valjarjem rastlinske odeje, plitvo zaorani prekrivni posevki, kontrola brez prekrivnih posevkov in brez folije ter kontrola s folijo. N-min vzorci so bili odvzeti po slojih iz globin 0,3m, 0,6m, in 0,9 m. Rezultati analiz so pokazali, da je bilo pred sajenjem zelja največ dostopnega dušika na parcelah, kjer je rastla inkarnatka in je bila zaorana. Tudi v rastni sezoni so bile najvišje vrednosti N-min na parcelah z inkarnatko, vendar med zaorano in povaljano ni bilo statistično značilnih razlik. Sledile so parcele, kjer je rasel ječmen, ki je bil zaoran. V povprečju vseh obravnavanj so bile jeseni statistično značilno višje vrednosti N-min po oranju v primerjavi z valjanjem prekrivnih posevkov (43,6 oz. 29,3 kg/ha). Preko zime se je v večini primerov količina N-min zmanjšala. Spomladi naslednje leto je bila najvišja vrednost N-min na parcelah, kjer je rasel ječmen, ki je bil zaoran. Prekrivni posevki pozitivno vplivajo na količino dostopnega dušika v tleh in na manjše izgube le-tega preko zime, kjer so bile najnižje prav na povaljanih parcelah s prekrivnimi posevki. Conventional vegetable production takes place at high nitrogen intakes and often places a burden on the environment. In organic production, nitrogen input is limited, the dynamics of release from the soil depends on weather conditions, which limits the height of the crop. The field experiment monitored the dynamics of mineral nitrogen (N-min) in nitrate and ammonia form before transplanting cabbage in spring 2016, during the growing season, autumn after harvest and the following spring 2017 in different soil care methods: cover crops (incarnate and winter barley ) rolled with a plant cover roller, shallow plowed cover crops, control without cover crops and without foil, and control with foil. N-min samples were taken from three depths up to 0.9 m. The results of the analyzes showed that before planting cabbage, most of the nitrogen was available on the plots where the incarnate grew and was cultivated. Also, in the growing season, the highest values of N-min were on plots with incarnate, but there were no statistically significant differences between plowed and rolled. This was followed by plots where barley was grown, which was plowed. On average, all treatments in the autumn had statistically significantly higher N-min values after plowing compared to the rolling of cover crops (43.6 and 29.3 kg/ha, respectively). Over the winter, in most cases, the amount of N-min decreased. In the spring of the following year, the highest value of N-min was on plots where barley was grown, which was plowed. Cover crops positively affect the amount of available nitrogen in the soil and had more minor losses over the winter, where they were lowest on rolled plots with cover crops. zelje dušik N-min ekološko kmetijstvo obdelava tal cabbage nitrogen N-min organic farming soil treatment true true false [L. Fras] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-02-15 15:32:39 2022-02-28 14:49:14 2022-04-01 10:04:03 0000-00-00 00:00:00 2022 0 Maribor 0 Maribor XII, 45, [1] f. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 635.34:546.17:631.147:631.51.021(043.2)=163.6 98998531 VS_Fras_Leon_2022.pdf VS_Fras_Leon_2022.pdf 1 13419AEB42C5CA13B5A865E329B03E8B 34dcaf778ff585d83d90845be6a5961455998490cf59efa45107e7ada0e7258b 024621c8-8e6d-11ec-9efa-00155d000105 20.500.12556/dkum/6085a2c6-3111-4471-9dfb-26d57c81aa20 https://dk.um.si/Dokument.php?lang=slv&id=156542 Fakulteta za kmetijstvo in biosistemske vede 0 0 0