(1) Soy has its own nitrogen fixation effect. Fertilizers required for soybean growth and development are supplied by and absorbed from Rhizobium. The nitrogen in the fixed air of Rhizobium is used for soybean, and the peak of nitrogen fixation is concentrated in the flowering to the granule stage, and the nitrogen fixation ability is weak before flowering and late in the drum.
(2) Soybeans are crops that require more fertilizer. For every 100 kg of soybean seeds produced, it is necessary to absorb 6.5 kg of pure nitrogen, 1.5 kg of phosphorus (P2O5), and 3.2 kg of potassium (K2O). The ratio of the three is roughly 4:1:2. Rhizobium can only fix nitrogen, and the nitrogen supplied to soybeans only accounts for 50% to 60% of the total nitrogen requirement of soybeans. Therefore, a certain amount of nitrogen, phosphorus and potassium fertilizer must also be applied to meet the needs of its normal growth and development.
(3) There is a difference in the amount of fertilizer required for different growth stages of soybean. Flowering to the granule stage is the period in which soybeans absorb the most nutrients, and the nutrients are absorbed less before flowering and after bulging.
The production level is below 150 kg/mu, nitrogen fertilizer (N) 3-5 kg/mu; production level is above 150 kg/mu, nitrogen fertilizer (N) 4-6 kg/mu, phosphate fertilizer (P2O5) 2-4 kg/mu, potash (K2O) 2-4 kg / mu. Nitrogen, phosphorus and potassium fertilizers were applied to the ditch after the seedlings were fixed. The soils deficient in boron and molybdenum were sprayed with 0.1% borax and ammonium molybdate leaves at the seedling stage and the initial flowering stage, respectively.
Source: Agricultural Technology Station, Xinxian City, Henan Province
(2) Soybeans are crops that require more fertilizer. For every 100 kg of soybean seeds produced, it is necessary to absorb 6.5 kg of pure nitrogen, 1.5 kg of phosphorus (P2O5), and 3.2 kg of potassium (K2O). The ratio of the three is roughly 4:1:2. Rhizobium can only fix nitrogen, and the nitrogen supplied to soybeans only accounts for 50% to 60% of the total nitrogen requirement of soybeans. Therefore, a certain amount of nitrogen, phosphorus and potassium fertilizer must also be applied to meet the needs of its normal growth and development.
(3) There is a difference in the amount of fertilizer required for different growth stages of soybean. Flowering to the granule stage is the period in which soybeans absorb the most nutrients, and the nutrients are absorbed less before flowering and after bulging.
The production level is below 150 kg/mu, nitrogen fertilizer (N) 3-5 kg/mu; production level is above 150 kg/mu, nitrogen fertilizer (N) 4-6 kg/mu, phosphate fertilizer (P2O5) 2-4 kg/mu, potash (K2O) 2-4 kg / mu. Nitrogen, phosphorus and potassium fertilizers were applied to the ditch after the seedlings were fixed. The soils deficient in boron and molybdenum were sprayed with 0.1% borax and ammonium molybdate leaves at the seedling stage and the initial flowering stage, respectively.
Source: Agricultural Technology Station, Xinxian City, Henan Province
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