First, to understand the fertilizer requirement of cotton, cotton is one of the crops with relatively large fertilizer demand, but the fertilizer requirement in the seedling and bud period only accounts for 20%~30% of the total fertilizer requirement, and a large amount of fertilizer needs to bloom from the flowering to the bellowing period. Therefore, the more suitable fertilization should be: bottom fat foot, seedling speed, bud fertilizer stability, flower bell fat, and general application of peach fertilizer. The fertilization ratio of nitrogen, phosphorus and potassium should be 1 : 0.3 : 1 .
The second is to apply the base fertilizer to the place where there are conditions. It is mainly based on organic fertilizer, with appropriate amount of phosphorus and potassium fertilizer. The organic fertilizer produced by the farmer applies about 4000 kg per mu , and the application of phosphate fertilizer is 25 kg. Potassium fertilizer 15 kg. Second, the application of inorganic fertilizer should be based on high-efficiency compound fertilizer. The high content of 25 kg per mu is applied , the medium content is about 50 kg per mu , and the application of potassium fertilizer is 10 kg, the holding boron is 0.4 kg, and the zinc fertilizer is 0.5. kg. The third is to use a hole to transplant seedlings. After fertilization, it should be separated by fine soil, and then planted with seedlings.
The third is to quickly apply the cotton field with sufficient base fertilizer and fertilizer. Apply one seedling fertilizer directly. The cotton field with insufficient base fertilizer should be applied twice in the seedling stage. The first application of urea is 5 kg per mu, and the second application of urea per acre is 8 ~10 kg, you can also apply about 25 kg of ammonium bicarbonate , or apply water and manure seedlings. In the seedling stage, it is necessary to highlight the seedlings with quick-acting fertilizer.
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