GRAIN YIELD OF SPRING BARLEY DEPENDING ON THEEFFECT OF MINERAL FERTILIZATION

Abstract

The purpose of research is to establish the effectiveness of foliar fertilization effect of spring barley plants with microfertilizers «Wuxal» for different variants of mineral fertilization on grain yield. The experiment included variants: factor A – rates of mineral fertilizers: N0P0K0 (control), N30P45K45, N60P90K90; factor B – rates of microfertilizers provided their application three times during the onset of tillering phenophases in plants (Wuxal Р Max), stem elongation (Wuxal Grain) and flowering (Wuxal Grain): 0 (control); 3.0 l/ha (1,0 +1.0 + 1.0); 4.5 l/ha (1.5 + 1.5 + 1.5); 6.0 l/ha (2.0 + 2.0 + 2.0); 7.5 l/ha (2.5 + 2.5 + 2.5); 9.0 l/ha (3.0 + 3.0 + 3.0). Results. The influence of foliar fertilization of plants with microfertilizers «Wuxal» and mineral fertilizers on the level of grain yield of spring barley was established. Conclusions. The effectiveness of mineral fertilizers and the application of foliar fertilization of spring barley plants with microfertilizers «Wuxal Р Max» and «Wuxal Grain» is proved. The level of grain yield for experimental variants N0P0K0 – 4.41 t/ha, N30P45K45 – 6.19 t/ha and N60P90K90 – 7.18 t/ha. The efficiency of microfertilizers as a result of foliar fertalization of spring barley plants on the influence on the level of grain yield depended on the background of mineral nutrition. The optimal rate of microfertilizers use on the background of N30P45K45 is 4.5 l/ha with a single application of 1.5 l/ha during the phases: tillering – «Wuxal Р Max», stem elongation and flowering – «Wuxal Grain», on the background of N60P90K90 – 6.0 l/ha with a single application of 2.0 l/ha during the above phases of development.