20.500.12556/DKUM-19170 Bilanca dušika različno gnojenega štirikosnega travnika The nitrogen balance of differently fertilized grassland cut four times per year Na kmetiji Vrecl v Zgornjih Hočah (325 m n.v., 46° 29' 31'' s.g.š., 15° 37' 13'' v.g.d.) smo v letu 2008 ugotavljali bilanco dušika različno gnojenega štirikosnega travnika. V travniškem poskusu (naključni bloki v štirih ponovitvah) smo štirikosni travnik gnojili z gnojevko količine od dveh in pol glav velike živine (2,5 GVŽ) ha-1, dodali pa smo tudi 48 kg P2O5 ha-1 (gnojilo hiperkorn). V obravnavanju 2 smo uporabili gnojevko manjše količine od (1,9 GVŽ) ha-1 in 41 kg P2O5 ha-1 ter v obravnavanju 3 smo uporabili mineralna gnojila NPK in KAN (170 kg N, 120 kg P2O5, 240 kg K2O). Pridobljeni rezultati kažejo, da smo v bilanci dušika z vsemi tremi obravnavanji gnojenja s pridelkom odnesli iz tal več dušika, kot smo ga dodali z gnojenjem. Analize skupnih zalog in mineralnega dušika v tleh kažejo, da nekaj dušika v odvzemu s pridelkom izvira iz zalog dušika v tleh, nekaj dušika v pridelku izvedenega poskusa pa lahko pripišemo tudi drugim virom (simbiotska vezava dušika iz zraka, vnos dušika v tla s padavinami). On the Vrecl farm in Zgornje Hoče (325 m a.s.l., 46° 29' 31'' N, 15° 37' 13" L) we studied the nitrogen balance of differently fertilized grassland cut four times per year (3 treatments) in 2008. In treatment 1 of the experiment (randomized block design with four replications) grassland was fertilized with slurry obtained from 2,5 annimal unit (AU) ha-1 and 48 kg P2O5 ha-1 (hypercornfertilizer). In treatmment 2 the amount of the slurry used was lower, obtained from 1,9 AU ha-1 and 41 kg P2O5 ha-1. And in treatment 3 we added mineral fertilizers NPK and KAN (170 kg N, 120 kg P2O5, 240 kg K2O). The results indicate that in all three treatments more nitrogen was taken from the ground with yield than added with fertilization. The analyses of common supplies and mineral nitrogen in the soil indicate that some nitrogen in the yield can be attributed to some other sources of nitrogen (symbiotic fixation of nitrogen from the ground, the intake of nitrogen to the soil with precipitation). bilanca dušik gnojenje štirikosni travnik balance nitrogen fertilization four-cut grassland true true false Slovenski jezik Angleški jezik Diplomsko delo 2011-06-24 09:44:22 2011-06-27 08:34:49 2022-04-13 15:09:06 2023-12-23 03:25:12 2011 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 URN:SI:UM:DK:HHKWLQJ2 UNI_Pusnik_Medved_Spela_2011.pdf UNI_Pusnik_Medved_Spela_2011.pdf 1 73C1A9BA039ECC85C5EE910FB97FD892 415b45ec423cfef67c944ca0ae83979b26de7c74da8abe5135e6fc4ecc4b2361 48478217-7c05-11eb-bb7a-00155d0001ca 20.500.12556/dkum/89bef501-4f08-404f-9ef7-499d89caee44 https://dk.um.si/Dokument.php?lang=slv&id=23074 Fakulteta za kmetijstvo in biosistemske vede 0 0 0