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经过三年来的试验证明,在黑龙江省含钾较高的土壤条件下种植大豆,在磷的基础上施用少量氮肥,表现出一定的增产作用,但氮肥过多不利根瘤生长和固氮活性。在氮磷基础上施用钾肥,协调植株生长,提高含糖量.有利根、茎、叶的木质部和韧皮部分化,加强体内养分水分运输和固氮能力,促进早熟提高产量。
After three years of experiments, it was proved that soybean was planted in the soil with high potassium content in Heilongjiang Province, and a small amount of nitrogen fertilizer was applied on the basis of phosphorus, which showed a certain increase in yield. However, excessive nitrogen fertilizer adversely affected the growth of nodules and the activity of nitrogen fixation. Potassium fertilizer is applied on the basis of nitrogen and phosphorus to coordinate plant growth and increase sugar content, which is beneficial to partial xylem and phloem in roots, stems and leaves, enhance nutrient and water transport and nitrogen fixation capacity in the body, and promote early maturity and increase yield.