Why do you need to apply more phosphate fertilizer in autumn sowing crops?

Legume crops include broad beans, peas, etc., and rapeseed, radish and other autumn-sown crops in the cruciferous family, which are sensitive to Phosphate fertilizer and require a large amount. The addition of phosphate fertilizer during autumn sowing can meet the demand for phosphorus in the critical period of phosphorus demand, which is very important for promoting its early maturity, high quality and high yield, especially in the soil with phosphorus deficiency, the yield can be greatly improved. The roots of the phosphorus-producing crops are developed, and the ability to absorb phosphorus is strong. The utilization rate of phosphate fertilizer applied to the season is about 10% higher than that of other crops.

Most of the autumn crops are dry crops, and phosphorus is less effective under dry farming conditions. After entering the winter, the microbial activity in the soil is weak, the phosphorus capacity is small, the rate is slow, and the strength is low. Moreover, under drought conditions, the displacement of phosphorus is small, and its effectiveness is 2 to 3 times lower than that of phosphorus under water conditions. From the perspective of improving the resistance of autumn-sown crops, after the sowing of autumn-sown crops, the crops are susceptible to drought and freezing under the harsh conditions of harsh winter rain and low temperature, and the application of phosphate fertilizer can improve autumn. The hydration and adhesion of the cell protoplasts during the wintering period of the crops reduce the freezing point, thereby improving the cold tolerance and drought tolerance of the crops, and is beneficial to the safe wintering of autumn crops.

Therefore, in the different rotation system, it is necessary to consider the key application to the cornice that can maximize the effect of phosphate fertilizer, and the autumn sowing crop is the best mouthwash for the priority application of phosphate fertilizer throughout the year. The following points should be noted in the application method. Phosphate fertilizer should be mixed with various organic fertilizers or ammonium bicarbonate. In the autumn sowing, the application of acupoints and strips should be used as the base fertilizer. The general dosage is 20-25 kg per mu, and the application depth is 6-10 cm. At the same time, it can be supplemented with 3 to 5 kg of phosphate fertilizer and 1 times of dry fine soil for seed application. The combination of base fertilizer and seed fertilizer, shallow application and deep application can achieve good fertilization effect.

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