Formation of highly productive crops of summer barley depending on dozes of nitric fertilizers and regulators of growth in conditions of Forest-steppe Right-bank

Abstract

The purpose. To determine influence of complex application of dozes of nitric fertilizers and substances regulating growth, on features of growth and development of summer barley and formation of basic elements of productivity in conditions of Forest-steppe Right-bank. Methods. General scientific (dialectics, experiment, analysis and synthesis, hypotheses); special: field — for studying interaction of subject of researches with weather conditions and receptions of technology of cultivation, visual, measuring and weight, quantitative, physiological, method of trial sheaf — for determination of individual efficiency of plants of summer barley, laboratory — for determining qualitative characteristics of soil of a plot, dispersive, correlation and regression — for determination of reliability of distinctions between factors, pair and plural dependences. Results. Results of researches on formation of individual and grain efficiency of summer barley depending on the level of mineral feed (N45 – 90P45K45) and regulators of growth Binom and Terpal are brought. It is noted that high parameters of individual productivity (quantity of productive stalks, bushing factor, quantity of grains in an ear and weight of grain from an ear) and productivity of grain of varieties of summer barley Vinnytsia 28 and Nabat were generated at entering nitric fertilizers in doze of N90 on phosphorus-potash background P45K45 and treatment of crops with regulator of growth Terpal. High dependence of productivity of grain of barley on technological receptions of its cultivation and individual efficiency of plants is fixed. Between productivity of grain and elements of individual productivity there is a strong positive dependence. The factor of plural correlation is equal R2=0,991. Conclusions. Direct dependence and positive influence of various dozes of mineral fertilizers and regulators of growth on efficiency of summer barley is determined. So, maximum level of productivity of grain (6,39 t/hectare),quantity of productive stalks (618 pieces/m2) and grains in an ear (24,9 pieces) and its weight (1,01 g) were received in a variant of experiment where they sowed a variety of summer barley Nabar, used regulator of growth Terpal and entered nitric fertilizers in doze of N90 on phosphorus-potash background P45K45.