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Fertilization in cotton growing season is not the result of more fertilization and higher yield. Sometimes improper fertilization can lead to the opposite result. On the basis of the application of the base fertilizer, it is generally not necessary to apply the quick-acting nitrogen fertilizer before the flowering of the cotton to avoid excessive vegetative or excessive vegetative growth; the top dressing should be based on the ground force and the growth of the plant when the fourth fruit branch is flowering. Urea; if the base fertilizer is not applied with potassium fertilizer or the amount of potassium fertilizer is too small, it should be applied as soon as possible.
After the cotton is topped, the nutrient is given priority to the young bell, and the upper fruit branch is in the most easily de-fertilized state. At this time, the foliar spray fertilizer should be used to ensure the required nutrition of the cotton plant. Urea and potassium sulphate are the best choices for foliar fertilizers. They are not only high in nutrient content, low in cost, but also safe to use. In the case of spraying fertilizer, it can be combined with photosynthetic nutrient film fertilizer to help plants absorb a large amount of light fertilizer, light energy, light, compatible with conventional fertilizers and nutrients to supply plant growth and development to the limit.
There are two situations in which control is carried out during the growth period. One is to control on time, also called “active controlâ€. If it is controlled after prosperous, it is called “passive controlâ€. Therefore, according to previous planting experience, the growth of cotton and the current cotton growth can be controlled 2-3 times, the first time in the initial flowering stage; the second time in the flowering period; the third time after the topping. The drug can be used to control the flower king 3 to control the madness, forcing the top nutrient reflux, and the inertia advantage of the tip is rapidly weakened to the capping situation.
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