Characteristics of Soybean Absorbing Fertilizer Soybeans are divided into three periods. The seeds germinate until the beginning of flowering. The beginning of the flowering period is the middle period, and the final flowering period is the final flowering period. The peak of N uptake of soybean was in the flowering peak period. The peak of P uptake was from flowering to the stage of scab, but the seedling stage was very sensitive to P, and the peak of K uptake was in the scab stage. The absorption of nitrogen fertilizer during the whole growth period of soybean is “less, more, and less”, while the absorption of phosphorus is “more, less, more”. Therefore, we must pay attention to nitrogen supply during flowering, and it is better to use phosphate fertilizer as base fertilizer and seed fertilizer. Soybean fertilization requires 2 to 5 kg of nitrogen per mu, 5 to 7.5 kg of phosphorus, and 7.5 to 10 kg of potassium. The equivalent of 20 to 30 farmyard fat, 8 kg of urea, superphosphate 20 to 25 kg, potassium chloride or potassium sulfate 10 kg. Soybean nitrogen fertilizer can be used as base fertilizer, seed fertilizer or topdressing fertilizer. Phosphate fertilizer is used as base fertilizer or seed fertilizer once, and potassium fertilizer is often used as base fertilizer.

Base fertilizer and fertilizer 1, base fertilizer. Basal fertilizer is mainly farmyard manure, mixed with phosphorus and potash fertilizers. General Mushi farmyard 20 gram, urea 2.5 kilograms, superphosphate 20 to 25 kilograms, and compost stacking for about half a month, planting when adding plant ash 2 to 3 Tam, fully mix well, open ditch bar Shi or cave facilities. 2, seed fertilizer. Fertilizers are applied in the absence of a base fertilizer or a small amount of basal fertilizer. In general, 10 to 15 kg of calcium phosphate and 3 to 5 kg of ammonium nitrate, or about 5 kg of ammonium phosphate, are applied per mu. The depth of fertilization is 8 to 10 centimeters, and the distance from seeds is 6 to 8 centimeters.

Whether topdressing soybeans topdressing nitrogen fertilizer depends on the previous fertilization. If the basal fertilizer is not applied and the soil fertility level is low, a small amount of nitrogen fertilizer may be applied in the early flowering period. Generally, 4 to 5 kg of urea or 5 to 10 kg of ammonium nitrate is applied per mu, and the distance from soybean plants to top dressing should be 10 Centimeters or so. Phosphorus fertilizers should also be added to topdressing fertilizers in the absence of phosphorus in soils. Ammonium phosphate is the ideal nitrogen and phosphorus fertilizer for soybeans. Do not apply nitrogen fertilizer to plots with higher levels of soil fertility. The top-dressing fertilizer can be at the flowering or final flowering stage. Use urea and ammonium molybdate more. Urea mu 1 to 2 kg, potassium dihydrogen phosphate 75 to 100 grams, add water 40 to 50 kg.

When sowing zinc is sown, 0.5 to 1 kg of zinc sulfate per acre or 0.2 to 0.3% of zinc sulfate solution is sprayed at the seedling and early flowering stages. The available boron content in soil is lower than 0.5 mg/L, and the effect of boron application is significant. 0.1% concentration of boric acid or borax can be used for extra-root spray.

The molybdenum-molybdenum fertilizer can be used as a seed dressing or deep-rooted application. 1, seed dressing: per kilogram of seeds with 1 to 2 grams of ammonium molybdate into the porcelain basin, add water to dissolve, the amount of water to mix wet seeds without fertilizer solution, after the shade dry seeds. 2. Exogenous fertilization: Use 0.05% to 0.1% ammonium molybdate, 50 kg/mu solution to spray before seedling to flowering. 3, seed fertilizer: 10 grams per acre of ammonium molybdate dissolved in water and potassium phosphate or manure mixture for a variety of fertilizer applications or points.

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