The effect of nitrogen nutrition and sowing density on the proportion of class 1 grains in malting barley
2009
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)
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.
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