Influence of mineral nutrition and predecessors on the yield and quality of soybean seed in the crop rotation link

Studies conducted in the Ryazan region have shown that both the presence of mineral nutrition and the nature of the predecessors in the crop rotation are extremely important for the soybean yield. The experiment was carried out on six-field crop rotations with two backgrounds of fertilizers — without fertilizers and with the application of (NPK)90. The soybean of the Georgiy variety, which is the fifth link in crop rotations, was used as an object of study. Barley, winter wheat, and various perennial grasses were present in each of the crop rotations. To replenish organic matter in the soil, the organic mass of plants in the form of crop residues after harvesting the main part of the crop and perennial grasses included in the crop rotation was crushed and incorporated into the soil. In each crop rotation at the time of soybean cultivation, soil fertility, yield and quality of soybean seed were studied in order to identify the best predecessors. It was revealed that the highest yield is achieved in a crop rotation with legume-grass grasses using (NPK)90 — the largest increase in relation to unfertilized options was 14%, 11% and 22.8%. Variants with fertilizers also demonstrate the best indicators of soybean seed quality in terms of protein and oil content, where crop rotations with legumes and grasses also reach the highest values. It was revealed that all fertilized variants with were characterized by better indicators of soil fertility compared to unfertilized ones. It is concluded that the presence of perennial sideral grasses has a positive effect on soil fertility and contributes to an increase in soybean yields.

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