Key points of Cotton cultivation at Bud stage

The climate of cotton bud stage in 2008 is extremely disadvantageous to the growth of cotton, with low temperature and high humidity, resulting in cotton growth lagging behind 3-5 days compared with previous years, cotton disease is serious, the overall growth is weak. How to strengthen the management of bud stage and set up a high yield shelf, we should pay attention to the following points in management:

Stable application of bud fertilizer: scientific fertilization according to soil conditions, application of base fertilizer and cotton growth. Based on phosphorus and potassium fertilizer, cotton fields with high soil fertility, sufficient bottom fertilizer and prosperous growth should not be topdressing nitrogen fertilizer, but 25,40kg cake fertilizer per mu can be properly applied. In general, 15-20 kg compound fertilizer is applied per mu with normal soil fertility and normal growth, especially in cotton fields with poor cotton growth and insufficient soil fertility this year, nitrogen fertilizer can be properly applied to facilitate strong and early growth, and fertilizer should be deeply applied and suppressed.

Implement scientific chemical control: cotton fields in more places of Rain Water should pay attention to chemical control, and in principle, look at the sky and the earth and look at cotton. Based on the daily growth of the main stem, when the daily growth of the main stem is more than 1 cm in the early bud stage and more than 2 cm in the bud stage, master a small number of methods to control waterlogging but not drought, prosperity does not control strong. Generally, 25% Zhuangzhuangsu is used per mu at the early bud stage, 2ml / mu, 4ml / mu at the bud stage, and 15kg / mu is sprayed at the top of the water.

Timely repair cotton and skillfully leave leaf branches: after cotton bud fruit branches protrude obviously, the leaf branches below the first fruit branch should be removed in time, only the branches should be removed without leaves, so as to reduce the unnecessary loss of cotton nutrition. This year, leaf branches should be skillfully left in the ridges of seedling deficiency caused by seriously diseased plots in cotton fields, and 1 or 2 strong leaf branches can be left on both sides of the seedling deficiency to make up for the deficiency with branches and make full use of the space. When selecting leaf branches, we should pay attention to keeping the upper leaf branches as far as possible.

Focus on disease control: the bud stage is the period of great occurrence of Fusarium wilt, timely ploughing and loosening soil moisture, and the quality of intertillage is the most important. Deep ploughing promotes root rooting, increases temperature and moisture, improves cotton growth, and destroys the conditions for the reproduction and spread of germs. Do a good job of chemical control, give priority to prevention, the combination of prevention and control. Spray fungicide and foliar fertilizer in time before or after rain to achieve the purpose of preventing and treating diseases and promoting the growth of cotton.

Do a good job of uncovering the film to cultivate the soil: after opening the film, it is beneficial to disperse soil moisture, improve the root system, and enhance the ability to absorb water and nutrients. The time is mainly in late June, and the operation is strictly prohibited when it is in full bloom. At the same time, it can be watered on rainy days or after opening the film, and soil cultivation can effectively prevent cotton from lodging.

The above management measures are very critical to the high yield of cotton. I hope that the vast number of cotton farmers will do a good job in combination with their own conditions, so as to lay a solid foundation for the high yield of cotton this year.