Soybean fertilizer fertilizer can not be less

In order to obtain high yields of soybeans, in addition to 3 to 5 kg of urea and 7 to 15 kg of superphosphate in the seedling stage (when the first compound leaf is unfolded), fertilization should be applied during the growth period to increase yield. 1. Qiao applied fertilizer. The flowering and sowing period of soybean is the peak period of fertilizer needed in a lifetime. During the flowering period, an appropriate amount of nitrogen fertilizer can be applied. Generally, urea is 5-8 kg/mu. Open the hole 5 to 7 cm away from the soybean root, cover the soil immediately after application. If the soil fertility is higher, the basal or seed fertilizer is sufficient, and the plants grow vigorously and luxuriantly, little or no topdressing should be applied, so as to avoid causing leggy, lodging, or flower bud fallout. In addition, when phosphate deficiency is insufficient, it is advisable to chase over 7-19 kg/mu of calcium phosphate. 2. Apply fertilizer. After the soybean enters the blast stage, the root activity gradually declines and the ability to suck up fertilizers decreases. At this time, the measures of leaf surface fertilizer supplementation can make up for the lack of nutrition during the grain-filling period, reduce the falling of flowers, improve the yield, and enhance the quality; 30% of superphosphate 50 ~ 70 kg, if there is a phenomenon of dislocation, it should also spray 0.5 kg of urea to prevent premature aging. 3. Spray fertilizer. When magnesium is deficient in magnesium, older leaves appear gray-green and yellow spots occur between veins. At this time, 0.5% magnesium sulfate solution is sprayed; in the absence of manganese, the rest of the leaves on the new leaf are yellow, and this can be sprayed in time. % of manganese sulfate solution; soybean lack of molybdenum, young leaves yellow-green, chlorotic chlorosis between the veins and swollen, curled down, this leaf was sprayed with 0.5% ammonium molybdate solution. (Yinzhuang Township, Qianxi County, 064301)

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