Matys V. Formation of productivity and quality of spring rape seeds depending on agrotecnical cultivation techniques in the conditions of Precarpathian

Object of research is processes of plants growth and development, forming and functioning of the photosynthetic apparatus and realization of potential of seed productivity of spring rape sorts depending on fertilizing and preemergence processing of sowings by herbicides. The purpose of researches was to ascertain the formation of productivity of spring rape sorts depending on influence of fertilizing and preemergence processing of sowings by herbicides in the conditions of Precarpathian. Methods of researches are visual and gravimetric methods for an establishment of phenological changes of culture's growth, development and productivity; biochemical method for definition of chemical composition of spring rape seeds; statistical methods: dispersive, correlation and regression analyses for an establishment of data's reliability and correlation dependences; comparative calculation method for calculation of economic and bioenergetics efficiency of cultivation of spring rape. Dependences between sorts, fertilizer, preemergence processing of sowings by herbicides and processes of plants growth and development, forming by them of harvest value and quality of spring rape grain are set; optimum mineral nitrogen sowing rate and type of herbicide for preemergence processing of sowings were substantiated; connection between structural indexes and crop capacity and indexes of spring rape seed quality was found. Production test and implementation of the improved technique was conducted at "Lendkom UA" Ltd. (Lviv region) on the area of 60 hectares. Industry is agriculture.