What should you pay attention to when fertilizing cotton? Keep these points in mind
What should you pay attention to when fertilizing cotton? Please provide guidance. When fertilizing cotton, pay attention to the following points for reference: 1. Use organic fertilizer as the main fertilizer and apply sufficient base fertilizer. When preparing the land, apply 2000-3000 kg of farmyard manure per mu, which can comprehensively balance cotton nutrition, improve the root system's ability to absorb nutrients, activate the soil, prevent compaction, and maintain root...
What should you pay attention to when fertilizing cotton? Please provide guidance
When fertilizing cotton, pay attention to the following points for reference:
1. Use organic fertilizer as the main fertilizer and apply sufficient base fertilizer. When preparing the land, apply 2000-3000 kg of farmyard manure per mu, which can comprehensively balance cotton nutrition, improve the root system's ability to absorb nutrients, activate the soil, prevent compaction, and maintain rhizosphere ecological balance.
2. Reduce the application of diammonium phosphate. Nitrogen, phosphorus, and potassium ternary compound fertilizer should be used, or a locally formulated fertilizer specifically for cotton can be selected. Alternatively, 40 kg of a 15-15-15 nitrogen, phosphorus, and potassium compound fertilizer can be used as base fertilizer. When applying other compound fertilizers, add 2 kg of Luhong No. 1 powder, which can improve cotton's resistance to Fusarium wilt, Verticillium wilt, and damping-off, and effectively solve the problem of seedling death.
3. Use 100 kg of cake fertilizer and 40-50 kg of biological bacterial fertilizer per mu as base fertilizer. When applying base fertilizer, plow organic fertilizers such as cake fertilizer, bacterial fertilizer, and two-thirds of the compound fertilizer into the ground, and apply one-third of the compound fertilizer to the surface during harrowing. This is beneficial for nutrient utilization during the cotton seedling stage.
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 steady growth.
5. Apply flower and boll fertilizer heavily. More than 80% of the nutrients cotton needs are required during the flowering and boll stage, so fertilizer should be applied heavily. Apply 20 kg of urea per mu with watering to meet the cotton's nutrient needs.
6. Apply topping fertilizer as a supplement. If premature aging is found before the autumn bolls cover the top, apply 8-10 kg of urea as a supplement with watering to prevent premature aging.
7. Apply foliar fertilizer skillfully. To meet cotton's needs for medium and trace elements, especially boron, zinc, and other elements, and to reduce deficiency symptoms, foliar fertilizer should be applied in the middle and later stages of cotton growth. Luhong Huishenglu foliar fertilizer can be selected for spraying. After the bud stage, use Luhong Jinkela cotton-specific foliar fertilizer and spray once every 7 days for 3-4 consecutive sprays. This can increase boll weight, promote growth, reduce flower and boll shedding, and has a significant yield-increasing effect.
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