Agriculture and forestry

Polishchuk Mihaylo Ivanovych – сandidate of Agricultural Sciences, Associate Professor, the chief of Agriculture, Soil Science and Agrochemistry chair of Vinnytsia National Agrarian University (21, 008, Vinnytsya, 3, Solnychna St., e-mail: polishchuk.mikhaylo@ukr.net).

Tynko Valentyna Vasylivna − graduate student of the Department of Agriculture, Soil Science and Agrochemistry of Vinnytsia National Agrarian University (21008, Vinnytsia, 3 Sonyachna Street) e-mail: 22valya.tinko@ukr.net).

Ukraine is a powerful participant in the world grain market, and grain stocks of domestic farmers are an integral part of global food security. Among cereals in the agro-industrial production of barley is a leading place in the structure of sown areas, it is second only to wheat. However, when conducting a comparative analysis of the yield of barley in Ukraine and other world producers, it should be noted that the average yield of its grain in our country is 2.5 t / ha, while in France it reaches 6.09 t / ha, Great Britain - 5 , 67, Germany - 5.69 t / ha [2]. Therefore, there is a need to find ways to increase the productivity of spring barley in specific conditions of its cultivation. One of the main ways to increase crop productivity is the stable growth and development of spring barley. Development is the formation of specialized organs and parts of aplant to perform its main biological function: the preservation of its species. Of particular importance in the cultivation of cereals are the processes of growth and development that underlie the formation of grains. One of the most important problems of plant growth and development in the technology of growing crops, in particular spring barley, is its growth processes. A characteristic indicator of growth processes, which affects the formation of crop yields, is its height. During our research, a lot of attention was paid to the development of culture in the right-bank forest-steppe of Ukraine.As a result, it was found that the height of plants increased from the germination phase to full maturity, due to increased plant biomass and depended on varietal characteristics and technological methods of cultivation and hydrothermal regime of years of research. Higher plant height in the phase of full maturity was observed in the variety Aizhan - 55 cm, and in the variety Aristei - 50 cm. It was found that depending on the factors studied, the height of spring barley plants in the tillering phase did not change significantly, but starting from the exit phase into the tube, the difference in height was significant. The application of mineral fertilizers provided an increase in the height of spring barley plants.

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