Melnychuk S. The technological and ecological peculiarities of Winter Rapeseed productivity in right-bank Forest-Steppe of Ukraine.

Dissertation is devoted to improving productivity and winterhardiness of Winter Rapeseed plants depending on the growing elements of crop management, in particular system of fertilization and genetics. It is observed the effect of the studied factors (fertilizer, hybrid) on winterhardiness rates, yields, food quality seeds of winter oilseed rape (oil content, erucic acid and glucosinolates). It presented three-year results of investigation of effect of different microelements' combination on yielding in Forest-Steppe agro-climatic region. It is showed evidence of positive effect of microelements' applications on yield increasing. Defined combinations of microelements for yield level improving. Include three years results of experiments to evaluate seven varieties of Winter Rapeseed for yield stability. Parameter has been determined the general and specific rate of adaptation for studied varieties. There are included results of relative stability, and breeding value of genotypes. It is determined Winter Rapeseed varieties with high and low level of adaptation ability and relative stability. An economical evaluation is done for such Winter Rapeseed varieties cultivation as Toccata, Nelson and Synthetic depending on fertilizers. There are presented results of evaluation of cost-effectiveness for different micro-and macro elements combination application. For the economic efficiency of crop management elements have been analyzed such parameters as net profit, cost of cultivation 1 Hz output and profitability