Seven key points of Scientific fertilization for Cotton

1. Give priority to organic fertilizer and apply sufficient base fertilizer. During soil preparation, the soil was disinfected by spraying disinfectant and 800 times solution of new high-fat film in time, and applying sufficient base fertilizer, applying 2000-3000 kg farm manure per mu to improve the ability of root system to absorb fertilizer, activate the soil, prevent consolidation and maintain the ecological balance of the rhizosphere.

two。 Reduce the application of diammonium phosphate. Nitrogen, phosphorus and potassium ternary compound fertilizer should be used, or 40 kilograms of three 15 nitrogen, phosphorus and potassium compound fertilizer can be selected as base fertilizer. When using compound fertilizer, spraying 800-fold solution of new high-fat film can improve the utilization rate of effective components of fertilizer and improve the disease resistance of cotton.

3. 100kg cake fertilizer and 40kg-50kg biological fertilizer were used as base fertilizer per mu. When using organic fertilizer as base fertilizer, organic fertilizer such as cake fertilizer, bacterial fertilizer and 2/3 compound fertilizer were turned into the ground, and 1/3 compound fertilizer was applied to the surface when raking, which was beneficial to the utilization of nutrients in cotton seedling stage. at the same time, spraying new high-fat film at the seedling stage can prevent bacterial infection, improve the ability to resist natural disasters and protect seedlings from thriving.

4. Stable application of bud fertilizer, bud fertilizer can be applied a small amount of compound fertilizer, generally 8-10 kg per mu, to achieve the purpose of stable growth, and spray Huawang No. 3 to inhibit the growth of main shoots, promote flower bud differentiation and improve plant disease resistance.

5. With the heavy application of flower and boll fertilizer, more than 80% of the nutrients needed for cotton are in the flower and boll stage, so it is necessary to apply heavy fertilization, watering 20 kg of urea per mu, and spraying cotton Zhuangtiling at the flower and boll stage to promote the transformation of cotton tree growth function to reproductive function. make cotton peach nutrition transport duct thicker, improve cotton peach swelling vitality, improve resistance, bud protection, boll protection, peach protection, accelerate cotton tree cycle budding, cycle boll opening, and improve fiber quality.

6. Make up the top fertilizer. The phenomenon of premature senescence of cotton was found before the top of autumn peach. It is necessary to apply 8-10 kg urea to prevent premature senescence.

7. Apply foliar fertilizer skillfully. In order to meet the needs of cotton for medium and trace elements, especially for boron and zinc, and to reduce element deficiency, foliar fertilizer should be applied after cotton growth. Cotton special foliar fertilizer plus 800-fold liquid of new high-fat film can be sprayed every 7 days. Spraying 3 times continuously for 4 times can increase boll weight, promote growth, reduce the phenomenon of falling flowers and bolls, and significantly increase yield.