Optimization of technologies of grain crops in the steppe of ukraine in the conditions of climate change

Abstract

It is determined that the efficiency of realization of high natural-climatic potential of the Steppe zone of Ukraine is limited by the increase of climate aridity. Therefore, the strategic objectives of the agricultural sector of the economy should be aimed at increasing crop productivity, saving energy resources, improving soil fertility, reducing anthropogenic pressure on the environment in order to ensure sustainable use of nature. According to the results of generalization of long-term data it is inserted that the maximum grain yield of maize hybrids of different maturity groups is formed in wet years, and the lowest - in dry, and plants best use the heat potential of southern Ukraine in wet and medium wet years, due to the highest intensity of production processes. Using the obtained regression equations, it is possible to select the most optimal hybrid composition for regional and local agroclimatic conditions of the Southern Steppe of Ukraine. According to the results of research, different degrees of variability of meteorological and agronomic indicators have been established. The use of statistical methods allowed to estimate the years of research on the index of favourable agrometeorological conditions and to establish regression equations of plant productivity