First, the principle of cotton fertilization is: apply enough base fertilizer, early application, light application of seedling fertilizer, stable application of bud fertilizer, re-applying flower bell fertilizer, supplementing top cover fertilizer. Fertilization is carried out according to the method of “suitable nitrogen, stable phosphorus, potassium increase, and micro-distributionâ€. Emphasize the "three look" (see the sky, see the ground, see the seedlings) fertilization, the center is to see the growth of cotton.
Second, the method of cotton fertilization is:
1. Apply enough base fertilizer. Apply organic fertilizer to the wheat before sowing, and plow in time (27 cm or more) to level the land. When the wheat is grown, leave enough reserved rows; deep-till or deep-planing the reserved rows before the large-scale freezing, and apply 60,000 to 75,000 kilograms of organic fertilizer per hectare with the whole land; about half a month before the transplanting of cotton seedlings, per hectare Apply ammonium carbonate 600 ~ 750 kg (or urea 220 ~ 280 kg), phosphate fertilizer 700 ~ 900 kg, potassium fertilizer 225 ~ 300 kg, borax 7.5 kg.
2, early application of seedlings fertilizer. Fertilize early in the seedling stage, the amount of fertilizer should be less, and strive to be stable and early. For plots with less base fertilizer, after slow seedling, apply urea 37-45 kg per hectare.
3, steady application of smart fertilizer. It is a combination of organic fertilizer and inorganic fertilizer. Strive for a steady and multi-peach. 375 kg of cake fertilizer per hectare, 75 kg of urea or 225-375 kg of ammonium bicarbonate, 105-120 kg of potassium sulfate or potassium chloride, 300 kg of superphosphate, and 13 cm of deep application.
4, re-apply flower bell fertilizer. Reapply quick-acting nitrogen fertilizer during flowering and bolling. Apply urea to 300-375 kilograms per hectare. After the application, it should be timely watered and chemically controlled according to weather conditions and cotton growth.
5, the application of top cover fertilizer. According to the growth of cotton, supplement the autumn peach fertilizer, mainly based on foliar spray, adding a stamina to the single bell. Apply 75 to 135 kg of urea per hectare. In the middle and late August, foliar application was carried out with a mixture of 0.3% potassium dihydrogen phosphate and 1% urea. Spray even 3 to 4 times. Each interval is 7 to 10 days to prevent premature aging.
Second, the method of cotton fertilization is:
1. Apply enough base fertilizer. Apply organic fertilizer to the wheat before sowing, and plow in time (27 cm or more) to level the land. When the wheat is grown, leave enough reserved rows; deep-till or deep-planing the reserved rows before the large-scale freezing, and apply 60,000 to 75,000 kilograms of organic fertilizer per hectare with the whole land; about half a month before the transplanting of cotton seedlings, per hectare Apply ammonium carbonate 600 ~ 750 kg (or urea 220 ~ 280 kg), phosphate fertilizer 700 ~ 900 kg, potassium fertilizer 225 ~ 300 kg, borax 7.5 kg.
2, early application of seedlings fertilizer. Fertilize early in the seedling stage, the amount of fertilizer should be less, and strive to be stable and early. For plots with less base fertilizer, after slow seedling, apply urea 37-45 kg per hectare.
3, steady application of smart fertilizer. It is a combination of organic fertilizer and inorganic fertilizer. Strive for a steady and multi-peach. 375 kg of cake fertilizer per hectare, 75 kg of urea or 225-375 kg of ammonium bicarbonate, 105-120 kg of potassium sulfate or potassium chloride, 300 kg of superphosphate, and 13 cm of deep application.
4, re-apply flower bell fertilizer. Reapply quick-acting nitrogen fertilizer during flowering and bolling. Apply urea to 300-375 kilograms per hectare. After the application, it should be timely watered and chemically controlled according to weather conditions and cotton growth.
5, the application of top cover fertilizer. According to the growth of cotton, supplement the autumn peach fertilizer, mainly based on foliar spray, adding a stamina to the single bell. Apply 75 to 135 kg of urea per hectare. In the middle and late August, foliar application was carried out with a mixture of 0.3% potassium dihydrogen phosphate and 1% urea. Spray even 3 to 4 times. Each interval is 7 to 10 days to prevent premature aging.
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