How to fertilize cotton scientifically? Remember these seven key points

1. Base the fertilization mainly on organic fertilizer and apply sufficient base fertilizer. When preparing the soil, promptly spray a disinfectant plus 800-fold Xingaozhimo solution to disinfect the soil, and apply sufficient base fertilizer, applying 2000-3000 kg of farmyard manure per mu, to improve the root system's ability to absorb nutrients, activate the soil, prevent compaction, and maintain the ecological balance in the rhizosphere.

2. Reduce the application of diammonium phosphate. Nitrogen, phosphorus, and potassium ternary compound fertilizer should be used, or 40 kg of a 15-15-15 nitrogen, phosphorus, and potassium compound fertilizer can be used as base fertilizer. When using compound fertilizer, combine it with spraying 800-fold Xingaozhimo solution to improve the utilization rate of the effective nutrient components of the fertilizer, and at the same time enhance the disease resistance of cotton.

3. Use 100 kg of cake fertilizer and 40-50 kg of biological bacterial fertilizer per mu as base fertilizer. When applying as base fertilizer, turn organic fertilizers such as cake fertilizer and bacterial fertilizer and two-thirds of the compound fertilizer into the ground, and apply one-third of the compound fertilizer to the soil surface during harrowing, which is beneficial to the utilization of nutrients during the cotton seedling stage. At the same time, spraying 800-fold Xingaozhimo solution during the cotton seedling stage can prevent pathogen infection, improve resistance to natural disasters, and protect the healthy growth of seedlings.

4. Apply bud fertilizer steadily. A small amount of compound fertilizer can be applied as bud fertilizer, generally 8-10 kg per mu, to achieve the purpose of steady growth, and during the cotton growing period, spray Cuhuawang No. 3 to inhibit excessive growth of the main stem, promote flower bud differentiation, and improve the plant's disease resistance.

5. Apply flower and boll fertilizer heavily. More than 80% of the nutrients needed by cotton are required during the flowering and boll stage, so fertilizer must be applied heavily. Apply 20 kg of urea per mu with irrigation, and during the flowering and boll stage spray Mianhua Zhuangdiling to promote the transformation of the cotton plant's growth function toward reproductive function, thicken the nutrient transport ducts of the cotton bolls, improve the boll expansion vitality, improve resistance, protect buds, protect bolls, and protect bolls, accelerate the cotton plant's cyclic budding and cyclic boll opening, and improve fiber quality.

6. Apply supplementary top-covering fertilizer. If premature senescence is found in cotton before the autumn bolls cover the top, apply a supplementary 8-10 kg of urea with irrigation to prevent premature senescence.

7. Apply foliar fertilizer skillfully. To meet cotton's needs for medium and trace elements, especially for elements such as boron and zinc, and to reduce deficiency symptoms, foliar fertilizer should be applied in the middle and late stages of cotton growth. Cotton-specific foliar fertilizer plus 800-fold Xingaozhimo solution can be selected and sprayed once every 7 days for 3-4 consecutive sprays, which can increase boll weight, promote growth, reduce flower and boll shedding, and have a significant yield-increasing effect.