IMPACT OF INOCULATION ON SOYBEAN SEEDPRODUCTIVITY IN THE SOUTHERN PART OF THE WESTERNFOREST-STEPPE

Abstract

The main results of research on the effect of seed inoculation on soybean
productivity in the southern part of the western forest-steppe are highlighted in the present paper. The field research was conducted during 2014-2016 at the research field of State Agrarian and Engineering University in Podillia. The soil structure of a study area is a
typical black soil, deep, heavy-adrenal low-humus on loess loam.
During the years of experimental research, there were optimal weather conditions for the formation of a nodulation apparatus on the roots of the following soybean varieties: Anzhelika, Diona and Lehenda. We noticed the maximum number of root bulbs at Diona soybean variety in terms of micro stage ВВСН 77 with HiStick application. The number of root bulbs at Diona soybean variety was 42.6 pcs/plant, it was 40.4 pcs/plant at Anzhelika soybean variety and it was 37.3 pcs/plant at Lehenda soybean variety. In the micro stage ВВСН 77, the largest mass of tubers, which were formed on the roots of soy plants, was noted at the plants which were treated with HiStick inoculant. Those indicators ranged from 1.24 – 1.42 g/plant for Anzhelika, Diona and Lehenda varieties. It has been proved that the yield of soy grain depends on hydrothermal conditions of the year, the
technology of cultivation and varietal crop characteristics. The results of the research revealed that Histick inoculant most influenced the seed productivity of Diona soy grain variety.