To solve the problem of low organic fertilizer application, no 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 P 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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