Yield of grass-leguminous mixtures depending on the botanical composition and fertilization with nitrogen

Abstract

Grasslands of different floristic composition have different yields Including of leguminous plants to grasslands leads to more profitable production, the use of mineral fertilizers is reduced and grassland forage of better quality is obtained. Two-factorial field trial was set up on experimental field of the Institute for Animal Husbandry, Belgrade-Zemun over period of 2003-2004 according to method of random block system in four repetitions. The effect of four H rates (0, 70, 140 and 210 kg N ha-1) on DM yield of pure alfalfa crop and its mixtures with cocksfoot, tall fescue and sainfoin. Presence of significant differences was determined in archived yields of mixtures under the influence of M fertilization and depending on the type of mixture for both levels of significance. The highest yields of DM in both years in both years was realized by alfalfa in pure crop -6,81 and 15,91 t ha-1, where as variants without N in the first year realized the highest yields 5,74 t ha-1, and with 210 N kgha-1 the highest yield was recorded in the second year 16,31 t ha-1.

Travnjaci različitog florističkog sastava daju različite prinose Uključivanjem leguminoza u travnjake postiže se rentabilnija proizvodnja smanjuje upotreba mineralnih đubriva, dobija bolji kvalitet krme travnjaka. Poljski dvofaktorijalni ogled postavljen je na oglednom polju Instituta za stočarstvo Zemun-Beograd u periodu 2003-2004 godine po metodi slučajnog blok sistema u četiri ponavljanja. Ispitivan je uticaj četiri doze N (0, 70, 140 i 210 kg N ha-1) na prinos SM čistog useva lucerke i njenih smeša sa ježe vicom, visokim vijukom i esparzetom. Utvrđeno je postojanje značajnih razlika u ostvarenim prinosima smeša pod uticajem đubrenja N i u zavisnosti od vrste smeše za oba nivoa značajnosti. Najveće prinose SM u obe godine istraživanja postigla je lucerka u čistoj setvi od 6,81 i 15,91 t ha-1, dok su varijante bez N u prvoj dale najveće prinose 5,74 t ha-1, a sa 210 kgN ha-1 najveće 16,31 t ha-1 u drugoj godini.