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The application of the flowering bell fertilizer once concentrated is applied twice: the flowering and bolling period is the period in which the growth and development of cotton is the most vigorous and the most fertilizer is needed. Generally, 25-30 kg of urea and 10 kg of potassium fertilizer are required. In view of the fast and concentrated characteristics of the flowering and ringing of the insect-resistant cotton, 2/3 of the flowering bell fertilizer can be applied to the initial flowering stage, and the remaining 1/3 is applied after about 15 days, which can meet the needs of the continuous flowering and ringing of the cotton. .
The topdressing soil is applied as a foliar application: in the late stage of cotton growth, the absorption capacity of the root system is reduced. If the nutrient is insufficient, it is easy to cause premature aging, and it is necessary to apply top fertilizer.
The old routine of cotton fertilization should be changed
Insect-resistant cotton effectively controlled the hazard of cotton bollworm, the number of bud-bells dropped greatly, the reproductive growth was strong, the bells were early and many, and the peak of fertilizer needed to be fast and fierce. If the traditional fertilization method is used, it is often unable to meet its needs, resulting in premature aging due to poor nutritional growth. Potassium fertilizer has the function of enhancing the resistance of cotton and the effect of disease prevention. Therefore, insect-resistant cotton needs to be added with potassium fertilizer. Add organic fertilizer, potassium fertilizer, reduce nitrogen and phosphorus fertilizer: about 3,000 kg of organic fertilizer and 10-15 kg of potash. From the traditional acre of urea 25-30 kg, reduced to 12 kg of urea.
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