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Fertilizing chemical fertilizers are aimed at supplying cotton nutrients. In addition to applying microbial fertilizers to provide nutrients to cotton, it is important to increase the beneficial microbial flora of the root layer soil, improve the soil microbial flora, increase the water stability pellets, and adjust the three proportions. Such as soil physical properties and biological and chemical properties to achieve the purpose of improving soil fertility. Therefore, the combination of organic and inorganic can not only achieve high yield of cotton, but also improve soil and improve fertility.
Cotton fertilization is divided into seedlings, base fertilizer and top dressing.
Nursery: Generally, the method of transplanting seedlings is adopted in North China. Microbial inoculants can be added to the nursery nutrient soil, which is good for disease prevention and strong seedlings. For example, every 500 g of the fungicide can be mixed with the organic fertilizer nutrient soil, and put into 300 nutrient bowls. Other management is the same as conventional seedlings.
The base fertilizer is in a cotton field with a certain ability to maintain fertilizer. The compound microbial fertilizer (containing N:P:K is 5:5:5) is applied 50 kg per acre. Use before planting, topdressing in cotton for flowering and bolling period of 40-50kg per mu. In the soil fertility is poor, the cotton field with the texture of the sand should increase the amount of fertilizer. In addition, the effective zinc content in cotton field 0.2mg/kg should be supplemented with zinc and boron fertilizer, zinc sulfate 1~2kg/mu. Borax 0.5--1kg per mu. It can also be applied in the bud stage, early flowering stage and flower. The bell period is carried out.
Reasonable fertilization of cotton is based on climatic conditions, cotton field fertility, cotton fertilizer requirements and cotton fertilizer requirements and cotton growth trend, rational management of fertilizers, play a role in fertility, promote cotton individual development and population development, vegetative organ development and reproductive organs Coordinated development, to achieve the high quality of cotton production, high yield and high efficiency.
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