What should we pay attention to when fertilizing cotton?

What should we pay attention to when fertilizing cotton? Please give guidance to cotton fertilization should pay attention to the following points for reference: 1. Organic fertilizer is the main fertilizer, and the base fertilizer is applied. When preparing soil, applying 2000~3000 kg farm manure per mu can balance cotton nutrition comprehensively, improve root system absorption and nutrient ability, activate soil, prevent hardening and maintain rhizosphere ecological balance. 2. Reduce the use of diammonium phosphate. Should use nitrogen, phosphorus, potassium ternary compound fertilizer, or choose the local cotton special formula fertilizer, can also choose three 15 nitrogen, phosphorus, potassium compound fertilizer 40 kg can be used as base fertilizer. Adding 2 kg Luhong No. 1 powder to other compound fertilizers can improve the ability of cotton resistance to wilt, verticillium wilt and blight, and effectively solve the problem of dead seedlings. 3. 100 kg cake fertilizer and 40~50 kg biological bacterial fertilizer are used as base fertilizer per mu. When making base fertilizer, organic fertilizer such as cake fertilizer, bacterial fertilizer and two-thirds compound fertilizer are turned underground, and one-third compound fertilizer is applied to the surface along with harrowing, which is beneficial to the utilization of nutrients in cotton seedling stage. 4. Apply fertilizer steadily. Bud fertilizer can be applied a small amount of compound fertilizer, generally 8~10 kg per mu, to achieve the purpose of stable growth. 5. Heavy application of flower and bell fertilizer. More than 80% of the nutrients required by cotton are in the flowering and boll period, so heavy fertilization is required, and 20 kilograms of urea per mu is used for watering and application to meet the nutrient needs of cotton. 6. Supplement top fertilizer. Cotton in the autumn peach cover before the discovery of premature senescence phenomenon, to supplement 8~10 kg urea watering application, to prevent premature senescence. 7. Apply foliar fertilizer skillfully. in ord to meet that needs of cotton for medium and trace element, especially boron and zinc, and reduce element deficiency, foliar fertilizer should be applied after cotton growth, and Luhong Huisheng dew foliar fertilizer can be selected for spraying. After bud stage, Luhong Jinkela cotton foliar fertilizer was sprayed once every 7 days for 3~4 times continuously, which could increase boll weight, promote growth, reduce flower and boll dropping phenomenon and have significant yield increase effect. Click for more cotton growing technology Click for more food crop growing technology