The following scientific fertilization methods are adopted for the outstanding problems of low organic fertilizer application, high nitrogen fertilizer application, excessive early nitrogen fertilizer application, general lack of fertilizer at late stage, and lack of attention to zinc fertilizer application in zinc-deficient boron soils. Combining organic fertilizer and inorganic fertilizer; controlling the total amount of nitrogen fertilizer, adjusting the proportion of base and topdressing fertilizer, reducing the amount of nitrogen fertilizer in the early stage, and shifting the amount of nitrogen fertilizer; and monitoring the long-term constant amount of phosphorus and potassium fertilizers, and the shortage of trace elements in the plant. According to the sowing method, the basal deep application shall be implemented by means of strips and holes, and the layer shall be covered with soil immediately after planting. The depth of cover soil shall be 6.7 cm or more; the top dressing shall be applied to the soil or the soil shall be applied to cover the depth of the soil. More than 6.7 cm; apply boron fertilizer to the boron-deficient soil.
First, the amount of organic fertilizer: 4000 kg per mu.
2. Application amount of nitrogen, phosphorus and potassium: the yield per hectare of lint is below 100kg, 16kg of nitrogen fertilizer, 7kg of phosphate fertilizer, and 12kg of potassium fertilizer; the yield per hectare is 100-150kg, and 15kg of nitrogen is applied per mu. , Phosphorus 6 kg, potassium 11 kg; per acre lint yield levels in more than 150 kg, Mushi nitrogen fertilizer 14 kg, phosphorus 5.5 kg, potassium 10 kg.
Third, the amount of boron fertilizer: For boron-deficient soil, apply 1 kg of boron fertilizer per mu.
In terms of fertilization ratio, basic fertilizer: 2000 kg of organic fertilizer applied to Mushi, 30% of the total amount of nitrogen and potassium fertilizer, and 60% of the total amount of phosphate fertilizer; Flower and bell fertilizer: 1,000 kg of organic fertilizer applied to Mushi, and 20 kg of total N, P, and K fertilizer. %; cap top fertilizer: 1000 kg of organic fertilizer in Mushi, 50% of total N and K fertilizer, and 20% of total P fertilizer.
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