Different application of base fertilizer before cotton sowing in cotton area

In the two-pick cotton area, the cotton front crops are mainly wheat and rapeseed, and there are barley, broad beans, vegetables and other mouthwashes, but most of the two-brewed cotton areas, wheat and rape recommended 80-90%. In order to obtain a bumper harvest of cotton for the former wheat and rapeseed, the base fertilizer must be applied according to the changes in wheat, oil and cotton planting patterns and cultivation levels in recent years. On the eve of the harvest of wheat and rapeseed planted in the cotton region this year, both crops are growing better. Farmers are expected to have a bumper harvest. After a few days of rainy rain in the first half of May, wheat and rapeseed generally fall, resulting in large-scale reduction of production. Received. In addition to the ability of some varieties to resist lodging and disease resistance, it is closely related to the improper use of base fertilizer.
From the point of view of the application of the base fertilizer, first, some farmers are biased with nitrogen fertilizer, ignoring phosphorus and potassium, causing wheat, rapeseed to grow, field shade, and lodging resistance to be greatly weakened. Second, the area of ​​cotton fertilizer is increasing. The number of peach fertilizers is increasing. The peach fertilizer that has not been used up by cotton can play the role of wheat and rapeseed base fertilizer. Some inexperienced farmers will fertilize again, which will inevitably lead to over-growth of wheat and rapeseed. The aging of the facilities, the function of regulating water and fertilizer is reduced, and the ability to supply fertilizer is weakened. Fourth, the amount of wheat planted is too large, the area of ​​rapeseed is increased, the density is doubled, and the fertilizer is not evenly grown. It is difficult to strengthen the seedlings;
At present, in the autumn, the wheat and rapeseed fertilizer should be scientifically applied according to the changes in cotton planting patterns and cultivation techniques.
First, high-fertility cotton fields can not apply base fertilizer. For the soil quality is excellent, cotton fertilization level is higher, especially in the field of applying more peach fertilizer, when sowing wheat or planting rapeseed, it should be clearly stated that there is no need to apply base fertilizer for the time being, and then according to the long-term topdressing of wheat and rape.
Second, the right fertilizer in low-fertility cotton fields. First, the field with poor soil quality and low fertilization level of cotton should emphasize the appropriate amount of base fertilizer; the second is to apply the base fertilizer to the rice field to change the cotton field; the third is to apply the base fertilizer for the transplanting of rapeseed. Generally, about 3,000 kg of decomposed farmyard manure is used per mu, or about 40 kg of domestic compound fertilizer, or about 25 kg of imported compound fertilizer.
Third, create conditions and enhance the ability to resist. First, the use of wheat, rapeseed, fertilizer resistance, lodging resistance, disease-resistant varieties; the second is to improve the farmland facilities, enhance the regulation of fertilizer and water; the third is to reduce nitrogen fertilizer, increase phosphorus and potassium, rapeseed per acre to support boron 0.5 kg; The fourth is to strengthen the monitoring of the seedlings, and timely and appropriate chemical control of wheat and rapeseed.

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