MySheen

Fertilization Technology of Cotton in Huang-Huai-Hai region

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, 1. The main problems in Huang-Huai-Hai cotton area are generally high amount of nitrogen and phosphorus chemical fertilizer, insufficient application of organic fertilizer, large amount of base fertilizer, insufficient topdressing fertilizer, and lack of trace elements boron and zinc. two。 The principle of fertilization (1) increase the application of organic fertilizer and advocate organic-inorganic cooperation. (2) according to the conditions of soil fertility, properly adjust and reduce the amount of nitrogen and phosphorus fertilizer, apply potassium fertilizer reasonably, and pay attention to the combined application of boron and zinc. (3) nitrogen fertilizer should be applied in stages and appropriately increase the proportion of nitrogen fertilizer in the middle stage of growth. (4) Fertilizer application should be related to high yield and high quality.

1. The main problems

In Huang-Huai-Hai cotton area, the amount of nitrogen and phosphorus fertilizer is generally high, the application of organic fertilizer is insufficient, the amount of base fertilizer is too large, the amount of topdressing fertilizer is insufficient, and the lack of trace elements boron and zinc is more common.

two。 Principles of fertilization

(1) increase the application of organic fertilizer and advocate organic-inorganic coordination.

(2) according to the conditions of soil fertility, properly adjust and reduce the amount of nitrogen and phosphorus fertilizer, apply potassium fertilizer reasonably, and pay attention to the combined application of boron and zinc.

(3) nitrogen fertilizer should be applied in stages and appropriately increase the proportion of nitrogen fertilizer in the middle stage of growth.

(4) Fertilizer application should be combined with high-yield and high-quality cultivation techniques. 3. Amount and proportion of fertilizer application

Under the condition of 70 kg lint per mu, the total amount of fertilization is 2000 kg of high quality organic fertilizer, 11 kg of nitrogen fertilizer, 5 kg of phosphate fertilizer (P2O5) and 5 kg of potassium fertilizer (K2O) per mu. For the cotton fields with deficiency of boron and zinc, pay attention to the supplementary application of boron and zinc fertilizer, the amount of boron and zinc fertilizer is 1kg / mu, and the concentration of leaf spraying is 2g / L, which is carried out from budding to flowering stage.

35%-40% nitrogen fertilizer is used as base fertilizer, 30%-35% is used at early flowering stage, 25%-30% is used at full flowering stage, phosphate fertilizer is all used as base fertilizer, and potash fertilizer is used as base fertilizer or base dressing (early flowering stage). Starting from the full flowering stage, the cotton fields with weak growth were sprayed with 0.5%-1.0% urea and 0.3%-0.5% potassium dihydrogen phosphate solution 50% 75 kg / mu, once every 7-10 days, for 2 times in a row.

 
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