In the autumn, the growth of cotton is transferred to the late growth stage, which is mainly composed of bolls and autumn peach development. In this period, we will focus on roots and leaves, and use scientific management methods to promote the healthy growth of cotton plants, prevent premature aging and greedy late-maturing and rotten peaches, and strive for a bumper harvest of cotton.

First, re-apply flower bell fertilizer

The flowering and bolling period is the period in which cotton needs most fertilizer. Re-applying flower and bell fertilizer has a significant effect on fighting for “three peaches”. Generally, 45% of compound fertilizer is applied to 20 to 30 kg. For cotton fields with poor soil fertility, less base fertilizer and weak growth, it can be applied early, when the cotton plants bloom more than 80%, and when one or two young peaches are sitting, the topdressing method is appropriate.

Second, the application of topping fertilizer

Replenishing the topping fertilizer mainly prevents cotton deficiency and premature aging in the late stage, promotes the stable growth of the plant, enhances the ability of disease resistance, insect resistance and anti-premature aging, and strives to multiply the autumn peach and increase the boll weight. Generally, the top dressing is carried out before and after topping. For the nitrogen-deficient or prematurely-deficient cotton field, spray 1% urea solution per acre for 50-75 kg, once every 5-7 days, and spray 2~3 times. For the phosphorus-deficient, potassium-producing or late-growing green cotton field, spray 0.2% potassium dihydrogen phosphate solution every 7 to 10 days, and spray 2 or 3 times to reach the later stage without yellow leaves, no leaves, no premature aging, high yield. High quality purpose.

Third, scientific pruning

When the cotton enters the bud stage, 4 to 5 early buds on the first and second fruit branches should be properly removed, and the cotton should be put up early to form a high-yield frame, and the peaches should be concentrated. The topping of the heart before the fall can effectively inhibit the inefficient growth of the upper part of the cotton and improve the ventilation in the field. Light transmission conditions, promote the upper part of the young buds to peach, increase the number of autumn peaches. Wipe the axillary buds in time after topping. It should be pruned in time to promote the conversion of nutrients to reproductive growth, and achieve the purpose of increasing the weight of the bells. Remove the inactive old leaves at the bottom of the cotton, take the waste branches and leaves that are covered with pests out of the cotton field, and dig deep into the pit to reduce the number of pests in the cotton field.

Fourth, reasonable regulation

The cotton field with good growth is generally controlled once at the initial flowering stage. The current temperature is high. The initial flowering control should be based on light control, and chemical capping should be carried out to control the excessive growth of the upper fruit branches, improve the light-receiving conditions in the middle and lower parts, and reduce the bad bells. Improve quality. (Yuan Green)