Genotype specificity in nitrogen nutrition of malting barley

Abstract

A three-year trial (2003-2005) was conducted under agro ecological conditions of Timočka Krajina (the experiment farm of Technological Research Center in Zaječar). Research object were six malting barley genotypes, which were top-dressed with the following amounts of nitrogen in the course of growing season: 40, 60, 80 and 100 kg ha-1. A non-fertilized variant served as a control. The obtained results indicated that the tested genotypes reacted to increased amounts of nitrogen by changing their morphological and biological characteristics as well as the technological values of grain. The effectiveness of the applied nitrogen depended significantly on the distribution of rainfall in periods of highest water uptake by malting barley.

Trogodišnji ogledi (2003-2005) su izvedeni u Centru za poljoprivredna i tehnološka istraživanja u Zaječaru. Materijal istraživanja bilo je šest genotipova pivarskog ječma koji su tokom vegetacionog perioda prihranjivani sledećim količinama azota 40, 60, 80 i 100 kg ha-1. Kao kontrola poslužila je varijanta bez prihranjivanja. Dobijeni rezultati pokazali su da genotipovi reaguju na povećane količine azota promenom morfoloških i bioloških osobina, kao i promenama tehnološke vrednosti semena. Efekti upotrebljenog azota značajno zavise od rasporeda padavina u periodima najveće potrošnje vode.