Cotton fertilization old routines to change
Insect-resistant cotton has effectively controlled the damage of bollworm, the number of shedding of bolls has been greatly reduced, her reproductive growth has been vigorous, her bells have been early and many, and the peak of fertility is required to be fast and fierce. If traditional methods of fertilization are used, they often cannot meet their needs, resulting in poor vegetative growth and premature aging. Potash fertilizer has the function of strengthening the resistance of cotton and its disease-preventing effect. Therefore, insect-resistant cotton needs to increase potassium fertilizer. Increase organic fertilizer and potash fertilizer to reduce nitrogen and phosphate fertilizers: about 3,000 kg of organic fertilizer in Mushi and 10-15 kg of potassium fertilizer. Urea 25-30 kg of urea from the traditional mu, reduced to 12 kg per mu urea.
The change of flower and boll fertilizer was applied twice in a concentrated manner. The flowering and boll season was the period when the growth and development of cotton was the most vigorous and the fertilizer was the most needed. Generally need to apply 25-30 kilograms of urea, potassium fertilizer 10 kilograms. For the characteristics of fast and concentrated flowering and belling of insect-resistant cotton, 2/3 of flower and bell-fertilizer can be applied in the early flowering period, and the remaining 1/3 can be applied again after 15 days or so. This can meet the need for continuous flowering and ringing of cotton. .
The top-dressing soil is topped with foliar topdressing: At the later stage of cotton growth, the absorption capacity of the root system is reduced. If the nutrient is insufficient, premature aging can be easily caused and the top dressing needs to be applied.
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