THE INFLUENCE OF MICROFERTILIZERS AND PLANT GROWTH REGULATORS ON THE YIELD AND GRAIN QUALITY OF SPRING BARLEY

The article analyzes the current world trends of finding ways to improve the productivity of crops, to improve the quality of agricultural products through the introduction of energy and resource-saving technologies. The usage of plant growth regulators and microfertilizers are the elements of modern crop growing technologies that allow to produce an additional crop by a minor investment. The purpose of the research was to improve the agro-technology of spring barley cultivation on dark-gray podzolic mid-loam soils to produce more stable grain yields with high brewing qualities. The researches were carried out during 2016–2017 on the lands of the sorting station of the Rivne State Center for Plant Variety Examination regarding the influence of pre-sowing seed cultivation and foliar feeding by plant growth regulators and microfertilizers on the yield and quality of spring barley grain. The analysis of the conducted research showed that the highest yield increase (1,12 t/ha) was obtained in the experiment where the treatment of seeds and spraying of barley crops of spring growth regulator Vympel-K (500 g/t) and microfertilizer Oracle seeds (1 l/t) with an etchant was applied. The higher yield of spring barley grain was formed due to the increased number of grains in the ear and a greater mass of 1000 seeds. Seed treatment by plant growth regulators and microfertilizers in all combinations, as well as their application to vegetative plants contributed to the improvement of brewing qualities of spring barley grain. The obtained experimental data have confirmed the feasibility of using microfertilizers and plant growth regulators for the cultivation of spring barley in the Western Forest Steppe and the need for further research on improving the technology of growing cereals