Greening winter wheat seed crops

Purpose. To study the influence of biological preparations on yield and seed quality of bread winter wheat. Methods. Laboratory (evaluating 1000 seed weight, activity of seed sprouting, seed vigor, laboratory germination, number of embryonic roots and coleoptile length); measuring and weight (yielding capacity); mathematical statistics (to assess the validity of research results). Results. It was established that when treating winter wheat crops with biofertilizers during spring and summer vegetation,, the yields of the cultivar Kolos Myronivshchyny, Myronivska storichna, Natalka, Yuviliar Myronivsky increased by 0.28-0.37 t/ha, the 1,000 seed weight increased by 1.3-1.5 g. The best result was obtained with the use of biofertilizer “Biokompleks BTU” in the VIII stage of organogenesis at the rate of 500 ml/ha. Spraying winter wheat crop with “Microbiological component of culture” (1 l/ha) resulted in increase of the yield (by 0.22-0.45 t/ha), output of conditioned seeds (by 3.0-8.0 %) and 1,000 seed weight (by 1.3-2.0 g). The highest yield for varieties Horlytsia myronivska (5.50 t/ha) and Hospodynia myronivska (6.05 t/ha) was obtained by application of the fertilizer “Microbiological component of culture” on the III, IV and VIII stages of organogenesis. In the case of application of the biofertilizers, a tendency has been found to increase indices of seed sprouting activity, seed vigor, laboratory germination, coleoptile length and number of embryonic roots in comparison with the control. Conclusions. Based on the results obtained, increase in the yields, sowing qualities and biological indices of winter wheat seeds produced on crops treated with the biofertilizers was revealed. To be adopted into production it is recommended to carry out spraying seed crops in spring-summer period of vegetation with the biofertilizers "Biokompleks BTU" and "Microbiological component of culture".