Application of base fertilizer skillfully to cotton to maintain yield increase
The base fertilizer in cotton field is to apply all kinds of organic fertilizer or bio-organic compound fertilizer, the second is to apply formula fertilization and balanced fertilization, the ratio of nitrogen, phosphorus and potassium is 3 ∶ 1 ∶ 3, and the third is to increase the application of potash fertilizer, not less than 15 kg per mu of base fertilizer, 0.5 kg zinc fertilizer and 0.4 kg boron. Fourth, appropriate amount of fertilization, should not blindly pursue quantity, high content of ternary compound fertilizer 25kg / mu can be applied; fifth, to apply fertilizer to open ditches or holes, cotton seedling roots should keep a certain distance from fertilizer.
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A New Cultivation Technique of Cotton for Saving Labor and Increasing Yield
This technique is based on the cultivation method of cotton without pruning and branching, only topping and edge center, which is also called secondary topping cultivation method. It is a more labor-saving one-time topping cultivation method, which saves at least 70% labor and increases yield by more than 8%. The cotton quality is basically the same as that of the traditional method. The key techniques are as follows: 1. Select the varieties and sow them in the middle. It is advisable to select varieties with large plant type, strong growth in middle stage, seed cotton yield of not less than 350 kg per mu and high yield of more than 500 kg. Usually, Huakang III series, Qiufeng big boll series and disease resistance should be selected.
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Spraying fertilizer on cotton is good for increasing yield and less diseases and insect pests.
Spraying nitrogen fertilizer: urea can destroy the chitin of insects. When cotton aphids (especially aphids) occur, the mixture of urea, washing powder and water in the proportion of 4 ∶ 1 ∶ 400 is sprayed, which has obvious killing effect. Spraying phosphate fertilizer: during the occurrence period of adult cotton bollworm, 1%-2% superphosphate leaching solution as foliar fertilizer can turn oxalic acid into calcium oxalate and lose its attraction to cotton bollworm. The duration of each phosphorus spray is generally 2-3 days. Spraying potash: 10kg of plant ash, 50kg of water, soaking
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