The growth characteristics of cotton are infinite growth, strong regenerative capacity, strong controllability of plant shape, and large amount of fertilizer. Generally speaking, sufficient farmyard manure is the basis for high yield and high quality of cotton. Adequate phosphate fertilizer can promote the robust growth of cotton plants, increase the weight of bolls, and mature early. Potash fertilizer is a catalyst for various enzymes in plants, promoting photosynthesis and cellulose synthesis. The balanced fertilization technology of cotton should implement the eight-character formula method of “nitrogenation, potassium addition, phosphorus supplementation and boron sprayingâ€. The following five techniques should be applied to the balanced fertilization of cotton.
First, pay attention to the application of farmyard manure The farmer's fertilizer can improve the soil, fertilize the soil, provide various nutrients for the crops, and apply a certain amount of fertilizer, which is the supplement and synergy of the farmyard manure. On this basis, the application of micro-fertilizer has a significant synergistic effect.
If the farmyard manure or nitrogen, phosphorus, and potassium fertilizers are not met, the effect of micro-fertilizer is not significant.
Second, the regulation of nitrogen ratio Farmers long-term partial application of nitrogen fertilizer, the results not only cause the loss and waste of nitrogen nutrients, but also make the proportion of nitrogen, phosphorus, potassium seriously imbalance. According to different soil fertility, the application of nitrogen fertilizer per mu is adjusted to 10-15 kg (including organic fertilizer nitrogen).
Third, increase the amount of potassium fertilizer application Cotton from the emergence of seedlings to the buds of potassium absorption accounted for about 24% of the total growth period of potassium, bud to flowering accounted for about 42%, flowering to maturity accounted for 34%. Therefore, potassium fertilizer should be applied or applied before the bud, in order to facilitate the early growth of cotton, focusing on the needs of bud, flower and bell growth and development. The amount of potassium fertilizer increased to 10-15 kg per mu.
4. Supplementation of Phosphate Fertilizer Phosphorus is not easy to move in the soil, and the dissolution and release are slow, and it is not easily absorbed by the roots. Therefore, the phosphate fertilizer should be applied as a base fertilizer to make it play a fertilizer in the early stage of growth. During the growth, the phosphate fertilizer is often mixed with the nitrogen fertilizer, and the fertilizer efficiency is much higher than that of the phosphate fertilizer alone. The amount of phosphate fertilizer should be added to 20-30 kg.
5. Spraying boron fertilizer Sufficient boron can not only promote the development of flower organs, but also facilitate pollination and increase the seed setting rate. It can also accelerate the transportation of carbohydrates in plants, increase the weight of single peach and the rate of clothing. Therefore, 0.2% borax solution should be sprayed once in the bud stage, the initial flowering stage and the full flowering stage.
First, pay attention to the application of farmyard manure The farmer's fertilizer can improve the soil, fertilize the soil, provide various nutrients for the crops, and apply a certain amount of fertilizer, which is the supplement and synergy of the farmyard manure. On this basis, the application of micro-fertilizer has a significant synergistic effect.
If the farmyard manure or nitrogen, phosphorus, and potassium fertilizers are not met, the effect of micro-fertilizer is not significant.
Second, the regulation of nitrogen ratio Farmers long-term partial application of nitrogen fertilizer, the results not only cause the loss and waste of nitrogen nutrients, but also make the proportion of nitrogen, phosphorus, potassium seriously imbalance. According to different soil fertility, the application of nitrogen fertilizer per mu is adjusted to 10-15 kg (including organic fertilizer nitrogen).
Third, increase the amount of potassium fertilizer application Cotton from the emergence of seedlings to the buds of potassium absorption accounted for about 24% of the total growth period of potassium, bud to flowering accounted for about 42%, flowering to maturity accounted for 34%. Therefore, potassium fertilizer should be applied or applied before the bud, in order to facilitate the early growth of cotton, focusing on the needs of bud, flower and bell growth and development. The amount of potassium fertilizer increased to 10-15 kg per mu.
4. Supplementation of Phosphate Fertilizer Phosphorus is not easy to move in the soil, and the dissolution and release are slow, and it is not easily absorbed by the roots. Therefore, the phosphate fertilizer should be applied as a base fertilizer to make it play a fertilizer in the early stage of growth. During the growth, the phosphate fertilizer is often mixed with the nitrogen fertilizer, and the fertilizer efficiency is much higher than that of the phosphate fertilizer alone. The amount of phosphate fertilizer should be added to 20-30 kg.
5. Spraying boron fertilizer Sufficient boron can not only promote the development of flower organs, but also facilitate pollination and increase the seed setting rate. It can also accelerate the transportation of carbohydrates in plants, increase the weight of single peach and the rate of clothing. Therefore, 0.2% borax solution should be sprayed once in the bud stage, the initial flowering stage and the full flowering stage.
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