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Soybean fertilization techniques are as follows:
1. Seed dressing. Soybean commonly used seed dressing methods are two, one is the rhizobium powder seed dressing, that is, every 5 kg of seeds with rhizobium powder 20 ~ 30 grams, 250 grams of water, the seeds and bacteria in the pot are fully mixed, dried Seeding; the second is micro-fertilizer seed dressing, before planting, according to 5 kg of seeds, weigh 5 to 10 grams of ammonium molybdate, fully dissolve ammonium molybdate with 250 grams of warm water, then spray the fertilizer on the seeds, try to make the fertilizer Covered with seeds, can be sown after drying. In the boron-deficient or zinc-deficient plots, seed dressing can be carried out with 0.05% borax solution or 0.1% zinc sulfate solution.
2. Reapply the base fertilizer. Soybean base fertilizer is better with organic fertilizer. Generally, 2000-3000 kg of high-quality farmyard manure is used per mu, and a small amount of fertilizer can be used. However, due to the tight summer time, the application of base fertilizer in soybeans is mainly based on chemical fertilizers. In plots with low soil fertility, nitrogen should be applied 6~7 kg, phosphorus and potassium should be 10~12 kg each; for fertile land, nitrogen should be 4~5 kg, and phosphorus and potassium should be 8~10 kg each. After tilling, plowing.
3. Skillfully apply top dressing. There are two cases of topdressing. First, for the plots where no base fertilizer is applied, topdressing must be carried out. Generally, 3 to 4 kg of urea or 10 to 15 kg of ammonium carbonate, 20 kg of superphosphate and 10 kg of potassium fertilizer are used. Nitrogen fertilizer can be chased half in the seedling stage and the initial flowering stage. Phosphorus and potassium fertilizers should be chased one by one, and the method of chasing should be applied as a ditch. The second is to apply the base fertilizer to the plot, according to the seedlings, if the seedlings are weak and yellow, the amount of nitrogen fertilizer can be supplemented to prevent defatting. Flowering and pod-forming period is the period when soybean needs most fertilizer. Therefore, it is necessary to re-apply a topdressing fertilizer. It can recover 2~5 kg of urea per acre, 7~8 kg of potash fertilizer, and apply it about 5 days before flowering.
Source: Science and Technology Information
How do soybeans balance fertilization?
According to the characteristics of soybean fertilizer, rational fertilization is one of the main cultivation measures for high quality and high yield of soybean.
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