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1. Ditch and prevent waterlogging. In the spring, green manure is most afraid of water. It is necessary to open three ditches, namely, ring-shaped ditch, box ditch and cross drain to ensure that the rain stops the water and prevents water from accumulating in the field.
2. Change the fat to the big fat. After the temperature in the spring is warming up, Ziyunying is transferred from the winter to the spring season, applying 3-5 kg ​​of urea or 7.5-10 kg of ammonium bicarbonate per mu, or spraying 0.2% potassium dihydrogen phosphate plus 0.5% urea to promote green manure. The branches and leaves are fierce, which can increase the yield of fresh grass by more than 20%. Spraying the boron key fertilizer on the planting field can significantly increase seed yield. 0.3% borax and 0.2% key fertilizer solution, 50 kg per acre of water, sprayed at the initial flowering stage. After use, the yield per acre is 8-10 kg, and the yield increase is over 10%.
3. Prevention of pests and diseases. The main diseases of green manure include powdery mildew and sclerotinia sclerotiorum, which can be controlled by carbendazim or retort; insect pests include aphids, leaf miners, thrips, etc., which can be controlled by dimethoate, and the armyworm can be controlled by trichlorfon.
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Due to the increase in fertilizer prices, the area of ​​green manure planted by farmers in winter has expanded. After the spring, as the temperature warms up and the rain increases, it is the key to achieve green manure yield.
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