After the cotton is topping, the growth advantage of the plant's top no longer exists, and the young bells become the strongest contenders for nutrients. If they cannot meet their needs, they will be discarded by the plants and fall off, and the lack of nutrients will cause the buds to fall off. This requires supplementing fertilizer to solve it.
After the cotton topping
Fertilizers can be supplemented with rhizosphere fertilization and foliar spray. Nitrogen and potash fertilizers are mainly used, and phosphorus-deficient soils are supplemented with phosphate fertilizers. According to the requirements of high cotton yield, the general cotton field is suitable for applying 7.5 kg urea and 7.5 kg of potash fertilizer; fertile oyster fields and cotton fields with many organic fertilizers and signs of prolonged growth are required to control the amount of nitrogen fertilizer; Application of nitrogen fertilizer can increase potassium fertilizer and phosphate fertilizer to consume excess nitrogen. After the topping of cotton, supplementing the fertilizer is not an optional job. It is an important measure that affects the output of cotton.
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