Role of bioproducts in the improvement of soybean productivity

The paper studies the influence of bioproducts on soybean plants under the conditions of Primorsky kray. The research was conducted on released soybean variety Primorskaya 86. The research evaluates the efficacy of bioproducts Biocomposite correct, Rhizoform + Static, and plant biostimulator Biosteam Start. The variant with inoculant Rhizoform + Static (seed treatment) had 20% efficacy against Septoria blight. The highest biological efficacy (50.8%) against downy mildew was observed in the variant with Biocomposite-correct and biostimulator Biosteam Start + foliar treatment with Biocomposite-correct. The studied products had a positive effect on the morphometric characteristics of soybean plants. The maximum gain in plant height was noted in the variant with Rhizoform + Static (48.3 cm) at the flowering stage compared to the control (33.2 cm). Using the products increased the number of nodules relative to the control (56.9 pcs.). The highest number of nodules was observed after seed treatment with Rhizoform + Static (77.6 pcs.). The largest grains formed after seed treatment with Rhizoform + Static (203.3 g) (the TKW was 159.4 g in the control variant). Biological yield varied from 3.3 t/ha (seed treatment with Biocomposite-correct + seed treatment with Biosteam Start + foliar treatment with Biocomposite-correct) to 3.8 t/ha (seed treatment with Rhizoform + Static) among variants compared to 2.5 t/ha in the control. The research results allowed us to conclude that the studied bioproducts and biostimulator were effective in increasing the productivity of soybean plants.