Effects of nitrogen fertilization on yield and grain quality in malting barley

摘要

The aim of this study was to investigate the effect?of different nitrogen rates on?the?yield and?physicochemical?properties of?four?malting barley?genotypes?(Kristal,?Premijum,Novi Sad?519?and?Novi Sad?525).?Three-year?trials?(2008 to 2010)?were carried out onthe non-calcareous smonitza?soil?type. The following nitrogen rates were applied: 50, 70, 90 and 110 kg ha-1.?Obtained results?show that nitrogen significantly?increased the?grainyield (2219 to 2987 kg?ha-1).?Grain quality was decreased by increasing nitrogen rates (1.24 to 2.13%). Apart from?nitrogen rates, the genotype also affected?the?yield. Premijum variety gave the highest grain yield and the lowest protein content. The optimal plant nutrition was achieved by applying 50 kg?N?ha-1. By further increasing nitrogen amounts, the grain yield increased from 380 to 769?kg ha-1, but the differences were not significant. Different nitrogen rates showed a significant effect on the absolute grain weight (3.00 to 5.76 g) and volume grain weight (2.22 to 5.28 kg hL-1).