1. Reasonable fertilization. The main application of organic fertilizer at the end, supplemented by chemical fertilizers. Each mus af 5000 kg of manure, 50 kg of superphosphate, 15 kg of potassium sulphate and a small amount of urea, in order to improve the structure of the soil and promote robust growth of plants.
2. Strengthen field management. In the seedling stage, timely cultivating, promoting the development of the root system, no longer seedlings suitable for late sowing, should be flooded with fertilizer and water, a push to the end. The field is always kept moist to prevent drought and prevent pests and diseases in time. At the beginning of the rosette and in the early stage of the package, spray 0.7% calcium chloride or 1% superphosphate solution, spray once every 7-10 days, alternately spray 2 or 3 times.
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