To solve the problem of low organic fertilizer application, non-inoculation of rhizobia, and neglect of trace element nutrients such as calcium, magnesium, sulfur, boron and molybdenum in the current soybean fertilizer application, the following scientific fertilization methods are recommended: Reapply organic fertilizer, inoculate soybean rhizobia For the lack of trace elements in the soil targeted application of trace element fertilizer; 100% of organic fertilizer and phosphate fertilizer and 50% of nitrogen and potassium fertilizer in combination with soil preparation before transplanting basal fertilizer, applied fertilizer into the soil, The soil is fused; 30% of nitrogen and potassium fertilizers are used as top-dressing; 20% of nitrogen and potassium fertilizers are used as top-dressing fertilizers. When top-dressing, digging fertilization ditch with depth of 15–20 cm is first used between two rows of soybeans. Then fertilize the soil.
The specific operation is as follows: The application amount of organic fertilizer is about 2000 kg per mu. The application amount of N, P and K is below the level of 150 kg per mu, and the amount of N fertilizer is 8 kg, the 4 kg of phosphate fertilizer and 5 kg of K fertilizer; the yield level per mu is 150-200 kg, and 7 kg of N fertilizer and 3.5 kg of phosphate fertilizer are applied per mu. Potash fertilizer 4.5 kg; per acre yield levels above 200 kg, Mushi nitrogen 6 kg, phosphate 3 kg, potassium 4 kg. Soybean rhizobial dressing was used before seeding. Application of calcium fertilizer per acre 50 to 100 kg. Soils with boron and molybdenum were sprayed with 0.1% borax and ammonium molybdate at the seedling stage and initial flowering stage, respectively.
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