Bondarchuk I. Optimization of winter rape cultivation technology under the conditions of the Left Bank Forest Steppe of Ukraine

The thesis presents a theoretical generalization and a new solution to the scientific issue of optimization of winter rape cultivation technology under the conditions of the Left Bank Forest Steppe of Ukraine. The technology is based on the study of such factors as plasticity and stability of modern hybrids grown in different soil and climatic zones, the effect of growth-regulating fungicides and growth regulators with anti-stress effect on the winter rape performance. Having analyzed winter rape varieties in terms of the yield capacity formation and their suitability for the cultivation in different agro-climatic zones in Ukraine. According to the results of the regression modeling of the sowing structure indices, we found that the highest calculated resistance to environmental factors is provided by the crop treatment by the Karamba Turbo fungicide, and the least stability is provided by the use of the Setar chemical. We established that the number of lateral shoots is the main indicator of productivity structure formation.