The growth characteristics of cotton are unlimited growth, strong regeneration ability, strong controllability of the plant shape, and large amount of fertilizer. Generally speaking, sufficient farmyard manure is the basis for high yield and quality of cotton. Sufficient phosphate fertilizer can promote the robust growth of cotton plants, increase boll weight, and early maturation. Potassium fertilizer is a catalyst for various enzymes in plants and promotes photosynthesis and cellulose synthesis. The balanced fertilization technique for cotton should implement the eight-character formula fertilizer method of “adjusting nitrogen, increasing potassium, supplementing phosphorus, and spraying boronâ€. Balanced fertilization of cotton should focus on the following five technologies. First, pay attention to the application of farmyard manure Fertilizer can improve the soil, fertility, for a variety of nutrients in the crop, and with a certain amount of fertilizer, is a supplement to the farmyard fertilizer and increase efficiency. On this basis, the application of trace fertilizer has a significant synergistic effect. If farmyard manure or nitrogen, phosphorus, and potassium fertilizers are not satisfied, the effect of trace fertilizers is not significant. Second, to adjust the nitrogen ratio Farmers long-term partial application of nitrogen fertilizer, the results not only cause nitrogen nutrient loss and waste, but also make the proportion of nitrogen, phosphorus, potassium seriously imbalanced. According to different soil fertility, the application of nitrogen fertilizer per acre to 10-15 kg (including organic fertilizer nitrogen). 3. Increased Potassium Fertilizer Application The absorption of potassium by cotton from emergence to budding accounts for about 24% of the whole growing period, and budding to blossom accounts for about 42%, and flowering to maturity accounts for about 34%. Therefore, potassium fertilizer should be applied or applied before budding, so as to facilitate the early growth of cotton and focus on the needs of the growth and development of buds, flowers and bells. The amount of potassium fertilizer increased to 10-15 kg per mu. 4. Phosphorus-supplementary phosphorus is not easy to move in the soil, and it is slowly released and dissolved, and it is not easily absorbed by the root system. Therefore, the phosphate fertilizer should be used as a base fertilizer to make it work in the early period of fertility. During the growth process, phosphorus fertilizers are often used in combination with nitrogenous fertilizers, and their fertilizer efficiency is much greater than that of the individual application of phosphate fertilizers. Phosphate should be added to 20-30 kg. 5. Spraying boron with enough boron can not only promote flower development, but also facilitate pollination and increase seed setting rate. It can also accelerate the transport of carbohydrates in plants and increase the weight and weight of single peach. Therefore, a 0.2% borax solution should be sprayed at bud stage, early flowering stage and flowering stage.
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