Cotton should be paid attention to fertilization

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. Therefore, the following points should be noted in the application of cotton: 1 increase the application of organic fertilizer, potassium fertilizer, reduce nitrogen and phosphorus fertilizer: about 3,000 kg of organic fertilizer, 10 to 15 kg of potassium fertilizer. From the traditional acre of urea 25 ~ 30 kg, reduced to 12 kg of urea. 2 Changing the flowering bell fertilizer once concentrated application for two applications: 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 to 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. . 3 Change the top-loading soil to apply for foliar application: In the late stage of cotton growth, if the nutrient is insufficient, it is easy to cause premature aging, but the absorption capacity of the root system is reduced, and the topdressing of the top-loading soil is better for foliar application.

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