The characteristics of soybean absorption in life

Characteristics of Soybean Absorption Fertilizer Soybean is divided into three periods. The seed is germinated to the early stage before the flowering. In this period, the nitrogen fertilizer is less absorbed, but the seedling stage is very sensitive to phosphorus. 2. The beginning of flowering is the middle stage. In this period, there is a need for nitrogen fertilizer, and the peak of nitrogen absorption is at the flowering stage. There is less demand for phosphate fertilizer.
3. Final flowering to maturity. In this period, there is a large demand for phosphorus and potassium, and the peak of absorbing phosphorus is in the flowering to pod-forming stage, and the peak of absorbing potassium is in the pod-forming stage. From this point of view, it is better to use phosphate fertilizer as base fertilizer and seed fertilizer. The flowering period must pay attention to nitrogen supply. Soybean fertilization requires 2 to 5 kg of pure nitrogen, 5 to 7.5 kg of phosphorus, and 7.5 to 10 kg of potassium. It is equivalent to 20 to 30 tons of farmyard manure, 8 kg of urea, 20 to 25 kg of superphosphate, and 10 kg of potassium chloride or potassium sulfate. Soybean nitrogen fertilizer can be used as base fertilizer, seed fertilizer or top dressing. Phosphate fertilizer is applied as base fertilizer or seed fertilizer once, and potassium fertilizer is used as base fertilizer or late foliar spray fertilizer.
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