How to apply fertilizer to cotton fertilization techniques to avoid premature aging of cotton

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Zhengdao Fertilizer Network Comprehensive News: How to apply fertilizer to cotton to prevent premature aging of cotton? The demand for fertilizer in different growth stages of cotton is different. In the key points of fertilization, we must do the best (base) fertilizer foot, seedling speed, bud fertilizer stability, flower bell fat, and general application of peach fertilizer. This fertilization will enable cotton to achieve early growth and long-term decline. The application rate of the base fertilizer generally accounts for about 60% of the cotton fertilizer requirement. The application of fertilizer should be based on organic fertilizer and high-content multi-component fertilizer.

Cotton Fertilization Skills How to apply fertilizer to avoid premature aging of cotton

The seedling stage should be based on the application of nitrogen fertilizer. This is because: the nitrogen content in cotton seedlings accounts for 3.3%, which is higher than other growth stages; the development rate of underground main roots in seedling stage is 4-5 times higher than that of aboveground young stems. Hair cross"; when the three leaves of cotton seedlings are true, the flower buds begin to differentiate, and early application of nitrogen fertilizer can promote the development and transformation of flower buds.

The bud period to the initial flowering stage is the fastest growing period of the main stem, and it is very prone to prosperous. Therefore, fertilization should also be based on organic fertilizer and multi-component fertilizer during this period to promote its stability. The flowering and bolling period and the belling period are generally based on the application of multiple compound fertilizers and urea, especially in the period of Shengling, it is necessary to apply peach fertilizer to prevent premature aging.

Potassium fertilizer can not be less, generally 30 kg of potassium fertilizer should be applied per mu of cotton field. Nowadays, farmers use inorganic compound fertilizers. The formulas of nitrogen, phosphorus and potassium are generally equal. For example, in 45% compound fertilizer, nitrogen, phosphorus and potassium are 15% each; 51% compound fertilizer Among them, nitrogen, phosphorus and potassium each contain 17%.

The demand for phosphorus in cotton is relatively small, and the use of high-phosphorus compound fertilizer is a great waste. The use of high-content multi-component fertilizers has been used to reduce the amount of single potash as appropriate.

For example, in every 4 kg of 45% NPK compound fertilizer, the potassium oxide contained is equivalent to 12.5 kg of potassium chloride; in 50% of the 50% NPK compound fertilizer, the potassium oxide contained is equivalent to 14.15 kg of chlorine. Potassium. Can not completely replace the elemental potash fertilizer because of the application of compound fertilizer.

Cotton with increased application of organic fertilizer has high yield and long-term decline. The nutrient content of organic fertilizer is relatively abundant, but its fertilizer efficiency is relatively slower than that of chemical fertilizer.

How to apply fertilizer to cotton fertilization techniques to avoid premature aging of cotton? Farmers' friends should pay attention to the following points when purchasing and applying:

  1. First, the purchased bio-organic fertilizers should not be stored together with chemical pesticides to prevent damage to functional microorganisms while avoiding direct sunlight;
  2. Second, the bio-organic fertilizer should be applied in combination with chemical fertilizers, so that quick-acting and late-acting nutrients can be released in batches for cotton. At the same time, it should be understood that organic fertilizers cannot replace potash, and potassium-deficient cotton fields must be supplemented with potash;
  3. The third is to apply in the case of appropriate sensation, in case of continuous drought, timely irrigation;
  4. The fourth is to ditch or squat deep, or to spread it and then plow it. According to the test of the agricultural scientific research department, whether it is organic fertilizer or inorganic fertilizer or organic-inorganic compound fertilizer, the deep application of 20 cm is about 3 to 5 percentage points higher than that of shallow application and spreading.

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