Soybean fertilization should adhere to the agrochemical micro-combination

Soybeans are crops that require more fertilizer and are more nutritious. It is estimated that for every 100kg of soybean grain produced, nitrogen (pure N) 7.2kg, phosphorus (P2O5) 1.8kg, and potassium (k20) 4.0kg are required, which is significantly higher than other grass crops. To this end, soybean fertilization should do the following three things:

1. Apply enough fertilizer. Organic fertilizers contain various nutrients and can continuously meet the demand for nutrients in soybean growth. Therefore, we must pay attention to the application of agricultural fertilizers. We must never think that applying fertilizer is a dispensable thing. Generally, about 30,000 to 45,000 kg per hectare is applied, and the sloping farmland is applied more, and the flat fertilizer is relatively less applied.

2. Apply proper amount of fertilizer. Biological nitrogen fixation is an important nutritional feature of soybeans that distinguish them from other grass crops. Its nitrogen fixation is 1/2 to 2/3 of the nitrogen requirement of soybean. Application of nitrogen fertilizer can hinder the growth of rhizobia and the activity of rhizobium, leading to a decrease in nitrogen fixation. However, after 40 days of sowing, the root nodules began to supply nitrogen to the crop, and the previous nodule could not supply nitrogen. Therefore, it is necessary to apply a certain amount of nitrogen fertilizer on the production, but the amount of nitrogen applied should be cautious. On the basis of the application of agricultural fertilizers, the application of chemical fertilizers is added to achieve a combination of agrochemical application. Generally, the plain hectare is applied with 75-100 kg of diammonium phosphate and 30-40 kg of potassium sulfate as the base fertilizer. The hillside is thinly applied with 100-150 kg of diammonium phosphate, 30 kg of urea and 40-50 kg of potassium sulfate as the base fertilizer. Biopotassium can be applied in conditions where 7.5 kg is applied per hectare.

3, with the application of micro-fertilizer. In addition to maintaining normal nutrients in the normal growth of soybeans, micronutrients are also needed. Field trial results show that soybean fertilization can promote soybean growth, enhance soybean stress resistance, and increase soybean yield. The micro-fertilizer commonly used in soybeans has ammonium molybdate.

Application of ammonium molybdate: used as base fertilizer, the amount of hectare is 150-1500g, which can be mixed with fertilizer to be applied into the soil; for seed dressing, use 2-6g ammonium molybdate per kg of seeds, and ammonium molybdate before seed dressing Dissolve with a little hot water (40 ° C), and then seed dressing; the concentration of soaking seeds is generally 0.05% -0.1% ammonium molybdate solution, soak for about 12 hours.

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