In the late growth stage of cotton, the ability of the root to absorb nutrients is significantly reduced. However, if nitrogen, phosphorus, potassium, zinc, boron and other fertilizers are applied to cotton leaves, they can prevent premature aging, promote early maturation, prevent diseases, prevent falling bells and knots. The effect of large peaches has a significant increase in production. 1, nitrogen fertilizer to prevent premature aging each time with 1% urea solution 75-100 kg, sprayed every 5-7 days 1, even spray 2-3 times, can enhance the photosynthesis of the leaves, to prevent premature aging, Improve the effect of production. 2. Phosphate Fertilizer promotes the application of phosphate fertilizer on the leaves of early maturing cotton, which can promote the fullness of seeds, increase the boll weight, and advance the boll opening. The method is to use 1000 grams of superphosphate plus 50 kilograms of water, soak after spraying for 12 hours, and use 75 kilograms of mu. 3. Potassium fertilizer is used to prevent disease. The lack of potassium in the late stage of cotton will cause blight during the period of boll-lining, which will lead to a serious reduction of cotton production. The method of spraying potassium fertilizer on the cotton leaf surface is to use a 0.3% potassium dihydrogen phosphate solution with a concentration of 75-100 kg per mu. Spray the whole plant and spray it 2-3 times. 4, Zinc fertilizer anti-fallen bell cotton late susceptible to zinc deficiency, will cause partial loss of green leaves, young leaves wilting, new young bell off, it is difficult to cover top peach. The method of spraying zinc on the surface of cotton leaves is to spray 0.1-0.2% of zinc sulfate or zinc chloride solution of 75 kg per mu, spray once every 5-7 days, and continuously spray 2-3 times. 5. Boron-fertilizer-bound peaches are susceptible to lack of boron in the late growth stage, which leads to increased fruit node nodes and increased lateral branches, resulting in fewer flowers and fewer bells, and lower yield. The timely application of boron fertilizer is beneficial to multi-plumbing and fruiting. Generally spraying 100 kg of boric acid solution 0.2% at full flowering period and spraying 2-3 times.
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