Effect of nitrogen rate and cutting time on grain and forage yield in dual purpose barley (Hordeum vulgare L.) cultivation in Gorgan
Subject Areas : Journal of Plant Ecophysiologyعلیرضا الازمنی 1 , Abbasali Nourinia 2
1 - محقق غلات- مرکز تحقیقات کشاورزی
2 - Abbasali Nourinia. Assistant Professor. Agricultural and Natural Resources Research and Education Center of Golestan.
Keywords: Protein, Urea, Biological yield, Harvesting stage, Zadox scale,
Abstract :
In order to evaluate the dual purpose barley cultivation, an experiment was conducted as split plot based on randomized complete blocks design (RCBD) at Agricultural Research Station of Gorgan, Iran. Three levels of nitrogen N; N1=35, N2=70 and N3=105 kg.ha-1 as main-plots and three cutting times C; C0=no-cutting, C1=first and C2=second harvest as sub-plots were studied with four replications. When forage harvested in 31 Zadox stage, generally less grain were produced than forage harvesting in 31 Zadox stage, were considerably reduced grain yield, as using more nitrogen could not recover postponement in harvesting for forage. According to the results generally, highest amount of forage and grain yield were obtained when 105 kg.ha-1 nitrogen applied in the 31 zadox stage. It could be suggested that, harvesting in the first node stage and application of 105 kg.ha-1 nitrogen should be considered for obtaining highest yield of forage and grain of barely in Gorgan region.