How to apply base fertilizer, seed fertilizer and top dressing to soybean

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First, base fertilizer. Increasing the use of farmyard manure as base fertilizer is an important condition for ensuring high yield and stable production of soybeans. Fertilizer is a complete fertilizer, minerals, high nutrient content, but also contains more organic matter, the nature of relaxation, long-term fertilizer, very beneficial to the cultivation of land. Organic fertilizer can also improve the physical and chemical properties of the soil, increase the degree of looseness, make the soil water, fertilizer and enhance the insulation capacity, forming a good environment for soybean growth. In farm manure, pig manure had the best effect on soybean yield, followed by horse dung and compost with more organic matter, and the effect of soil manure was poor. The amount of basal fertilizer applied depends on the specific conditions such as the quality of manure, soil fertility, and the amount of fertilization in the previous crop. General high-quality manure, apply 1000--1500kg per mu, poor quality, 2000--3000kg per mu. For soils with low soil fertility and small amount of fertilization, pay attention to applying organic fertilizer.

Second, fertilizer. In most cases, superphosphate is used as a soybean seed fertilizer to achieve significant yield increase. Use 10-15kg per acre. Thin application of fertilizers often need to add a small amount of nitrogen fertilizer, applied per acre urea 10kg or ammonium nitrate 10-15kg mixed application, nitrogen, phosphorus ratio of 1:3 or 1:2 as well. When applying fertilizers, special attention should be paid to the isolation of fertilizers and seeds to avoid contact with seed fertilizers so as to avoid burning seedlings. Deep application of fertilizer can significantly increase production.

Third, top dressing. A top dressing during the branching period to the beginning of flowering has a good yield increase effect. Soil fertility is low or the growth of soybean seedlings is thin. The more difficult ridged land should be topdressed. When the soil is relatively fertile, the basal and seed fertilizers are sufficient, and the soybeans grow robustly. When the plants are flourishing, it is not necessary to top-dress, so as to avoid causing lodging. When soybean topdressing, it is necessary to consider the adaptation of nitrogen and phosphorus. The amount of topdressing fertilizer is 10kg of urea, 20- to 30kg of ammonium bicarbonate, 10 to 15kg of ammonium nitrate per mu, and 15 to 20kg of superphosphate. During the formation of soybean seeds, foliar fertilizers may be sprayed by spraying 1% urea + 0.5% potassium dihydrogen phosphate + tianfengsu (Suofeng 481) 1 bag of 15 kg water solution per acre. When the pods are touched, they are sprayed once every 10-14 days and there is a significant increase in production.

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