Tymofiychuk O. Productivity of maizegra in during the use of growth regulators in the conditions of western forest-steppe

In the dissertation there are presented results of researches in the study of processes of plants growth and development, formation of photosynthetic, individual productivity of the examined maize hybrids and their influence on crop yield and quality of maize grain depending on a method and norms of the use of growth regulators of a new generation. Use of growth regulators "Vermystym", "Vermibiomah", "Vermiyodis" for preplanting seed treatment, one-time and double-time spraying of plants during vegetation assisted in increasing of energy of germination and similarity of seeds, development of strong rootage, stimulated growth and development of plants, assisted in increasing of the content of easily accessible substances in soil, under their influence the processes of breathingand nutrition were intensified, which consequently provided considerable increase of crop yield of grain of hybrid maize PR39R58 and Kadr 267 MB on all variants. Received and summarized results of the researches allow us recommend to agrarian enterprises the most economic methods and norms of the use of growth regulators of a new generation in maize growing technologies in the conditions of western forest-steppe which provide the receipt of crop yield of maize grain on the level 6,92-8,36 t/ha.