Kovalenko P. 3. Biological and technological peculiarities of winter wheat productivity formation on the typical black soil in Foreststeppe of Ukrain

3. The thesis is devoted to peculiarities identification of formation and realization of genetic potential of winter wheat varieties of different regional selection in terms of wheat fertilization system optimization and implication of soybean and summer rape as a preceding crop under conditions of Foreststeррe of Ukraine. Practicability of morpho-physiological method usage as a diagnostic method regarding differentiation and reduction of generative organs in dynamics, determination of factors influence and carrying out of correcting technological measures during ontogeny which ensures maximum realization of plants biological potential are shown in the thesis. Identification of varieties in terms of winter hardiness and heat resistance is carried out in the thesis, morphological and physiological peculiarities of crops varieties which precondition different level of resistance are determined and also technological measures regarding improvement of crops lifespan, activation of physiological-biochemical processes aimed at improvement of crops resistance are elaborated. Economic and energetic efficiency of winter wheat growth technologies is grounded in the thesis .