SOYBEAN PRODUCTIVITY DEPENDING ON APPLICATION OF BIOLOGICAL PRЕPARATIONS UNDER CONDITIONS OF PRIMORYE

Abstract

Under conditions of Primorye Territory was established a positive effect of presowing treatment of soybean seeds with biological agents on soybean productivity and resistance to diseases. According to research findings, the cultivar Primorskaya 69 turned out to be most responsive to biopreparation application. Seed treatment jointly with preparations Mizorin and Rizotorfin contributed to the minimal development of Septoria disease, mildew and cercosporosis. Affection rates of the crop decreased by 5.3; 7.1 and 2.5 percent, respectively, as compared with the control. Seed treatment with biopreparations had a positive effect on all yield structure elements and productivity of soybean. The maximum increase in yield was obtained, when seeds were treated with Mizorin and Rizotorfin jointly: 1 tonne per ha in Primorskaya 13 cultivar of soybean and 0.7 tonne per ha in Primorskaya 69. Joint application of preparations Mizorin and Rizotorfin for seed treatment was found to be an effective technique having a stimulating effect on soybean plants and productivity. Low consumption rates and relatively low costs of the preparations make their application highly profitable.