Fertilizer is a method of fertilizing a small amount of fertilizer near the seed when sowing. The role of seed fertilizer is to ensure that the seedlings of spring crops are strong and the amount of seed fertilizers cannot be used. The ratio of nutrients is mainly phosphorus, with a small amount of nitrogen. The commonly used seed fertilizers are phosphorus, with a small amount of nitrogen. The commonly used seed fertilizer is diammonium phosphate. Although the amount of fertilizer is not much, it can play the role of “a couple of thingsâ€.
The key to the application of fertilizer is to control the appropriate amount, but also pay attention to the fertilization position, a small amount of fertilizer should be applied in the seed obliquely 3 to 5 cm below, avoid the chemical fertilizer close to the seed, otherwise even if the number is appropriate, there may be burning problems . Under mechanical sowing conditions, seed and fertilizer are sown separately from the two reserve tanks and the two seed tubes, so that the fertilizer and the seed do not lie on the same plane to ensure safe emergence.
Not all nitrogen fertilizers are suitable for seed fertilizers. They must both strictly control the amount of nitrogen applied to the seed fertilizer and select nitrogen fertilizers. Single nitrogen fertilizer and ammonium sulfate are suitable for seed fertilizer, and ammonium bicarbonate, ammonium chloride, ammonium nitrate and urea are not suitable. In recent years, the lessons learned from the improper use of seed fertilizers in various regions have caused burns and sprouts to be bad. For example, high-tower high-nitrogen compound fertilizers are used as seed fertilizers, and where there is a large amount (greater than 10 kg/mu) and the soil is not deep enough, there are various problems in inhibiting seedling growth. Compound fertilizer with diammonium phosphate as a seed fertilizer is good, safe emergence, seedling growth and robust.
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