1. Topdressing flower fertilizer. Flower manure should be applied in the early flowering period, with nitrogen and phosphorus as well. Urea use 3 kg - 5 kg of urea, superphosphate 7.5 kg - 10 kg, in the soybean root side 5 cm - 7 cm at the point of application, after the application of soil cover fertilizer. 2. Spray foliar fertilizer. In the period from flowering to grain-drilling, multi-component complex nutrient solution is sprayed; Add 50 grams of urea, 100 grams of potassium dihydrogen phosphate, and 100 grams of borax per 50 kilograms of water (dissolve it with a small amount of warm water first). Mix 25 grams of ammonium molybdate thoroughly and apply evenly to the opposite side of soybean leaves. - 3 times, 75 kg of fertilizer solution per acre. 3. Take heart. Indulge in an indeterminate clam variety. At the end of the flowering period and the end of the flowering period, sunny days were selected to pick up the top growth point. 4. Spray paclobutrazol. Indica-type indica rice varieties sprayed more paclobutrazol than limited-sorghum varieties. Spraying method: from 7 days before flowering to about 7 days after flowering, 15% paclobutrazol wettable powder per acre 50g - 100g, add water 50kg - 75kg, evenly sprayed on the leaves after dilution. On the front and back, no heavy spray or no spray. Indefinitely crusted varieties and good growing soybeans should be applied early and reused. 5. Spray diiodobenzoic acid. In the first flowering period and full flowering period, the first flowering period is 100ppm and the flowering period is 200ppm. Before the spraying, the pure product is dissolved in ethanol at the ratio of 1:100, and then diluted with water and evenly sprayed. Each time 50 kg of liquid spray per acre. Early maturing varieties or poorly growing soybeans should not be used. 6. Spray Chestnut. When soybeans grow four compound leaves, they are sprayed with 0.1% chlormekasol solution 50 kg per acre for 1 time, and then sprayed with 0.5% chlormethaone solution for 1 time. Liquid 50 kg. 7. Spraying sodium bisulfite. In the initial flowering period and full flowering period of soybeans, spray 1 time, each time, 10 grams of sodium bisulfite per acre, add 75 kg of diluted water and spray. The spraying time is better when the afternoon sunlight is not very strong. China Agricultural Network Editor
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