The effect of nitrogen nutrition and sowing density on the proportion of class 1 grains in malting barley

• Published in: Acta Agriculturae Serbica (Serbia) Vol. 14; no. 27
• Main Authors: Paunovic, A., Faculty of Agronomy, Cacak (Serbia), Knezevic, D., Faculty of Agriculture, Zubin Potok (Serbia), Jelic, M., Faculty of Agriculture, Zubin Potok (Serbia), Madic, M., Faculty of Agronomy, Cacak (Serbia), Cvijanovic, G., Faculty of Biofarming, Sombor (Serbia), Djalovic, I., Faculty of Agriculture, Novi Sad (Serbia)
• Format: Journal Article
• Language: English
• Published: 2009
• Subjects: ABONOS NITROGENADOS; APPLICATION RATES; DOSE D'APPLICATION; DOSIS DE APLICACION; ENGRAIS AZOTE; EPAISSEUR; ESPACEMENT; ESPACIAMIENTO; ESPESOR; GRAIN; GRANOS; HORDEUM VULGARE; http://www.fao.org/aos/agrovoc#c_16113; http://www.fao.org/aos/agrovoc#c_3346; http://www.fao.org/aos/agrovoc#c_3662; http://www.fao.org/aos/agrovoc#c_5195; http://www.fao.org/aos/agrovoc#c_7272; http://www.fao.org/aos/agrovoc#c_7726; NITROGEN FERTILIZERS; SPACING; THICKNESS
• ISSN: 0354-9542

Grain classification is the most important barley quality criterion. According to EBC regulations, barley is classified into three classes, depending on grain thickness (class 1: greater than 2.5 mm, class 2: from 2.2 to 2.5 mm and class 3: less than 2.2 mm). High-quality malting barley should have at least 90% of class 1 grains. The objective of this study was to examine the proportion of class 1 grains in five spring barley cultivars grown at three different sowing densities (300, 400 and 500 germinating seed/square meter) and three N fertilization rates (50, 80 and 100 kg/ha) during three growing seasons. The highest proportion of class 1 grains was obtained at a density of 300 seed/square meter in all years of study. Increasing N rates induced a reduction in the proportion of class 1 grains. A highly significant difference was observed between the highest N rate and the control without topdressing (50 kg N/ha) and the treatment with 80 kg N/ha.