First, the cause of fat damage Blind application of manure. In production, people always think that crops have a large demand for manure, so once the crops are poorly grown, they will not ask for defects and apply them all. Therefore, the more the fertilizer is applied, the more the excess is caused and the fat damage occurs. In particular, the application of volatile nitrogen fertilizers, such as ammonium bicarbonate and ammonia water, is easy to produce and cause crop damage; excessive application of nitrogen fertilizer can also cause plant nitrous acid accumulation and yellowing of leaves. Excessive application of nitrate nitrogen fertilizer can easily cause chlorosis and deficiency of molybdenum in crops.
2. The amount of chasing is too large. Excessive application of chemical fertilizer or human and animal excrement will cause the soil fertilizer concentration to be too high, so that the roots of the crop will absorb nutrients and moisture and cause damage.
3. Apply unfertilized organic fertilizer. Undecomposed organic fertilizer will produce a large amount of organic acid and heat during the decomposition process, which may cause rooting.
4. The topdressing is too close to the root of the crop. Because the chemical decomposition fertilizer is fast and high, the fertilizer is too close to the root system to cause fertilizer damage.
Second, preventive measures No organic fertilizer is applied. Organic fertilizers must be fermented and then applied. In particular, poultry manure should be fermented with organic fertilizer and fertilizer.
2. Rational use of fertilizers. The use must be measured first and applied at concentration and concentration, especially if the nitrogen fertilizer is not too much at a time. The concentration of foliar spray should not be too high. Urea as a toe fertilizer, the concentration should not exceed 0.3%, spray can be wet.
3. Add organic fertilizer. The organic fertilizer applied to the soil has a strong adsorption capacity for the cation, so that the concentration is not too high, and the buffering ability of the soil nutrient is improved, which can greatly reduce the occurrence of fertilizer damage.
4. Fertilization should be about 10 cm from the root of the crop, and it should be applied deep. Immediately after top dressing, cover the soil to prevent seedling stage burning and loss of fertilizer efficiency. The soil should be fertilized in the dry season and the water should be poured in time to reduce the concentration and avoid the phenomenon of burning.
2. The amount of chasing is too large. Excessive application of chemical fertilizer or human and animal excrement will cause the soil fertilizer concentration to be too high, so that the roots of the crop will absorb nutrients and moisture and cause damage.
3. Apply unfertilized organic fertilizer. Undecomposed organic fertilizer will produce a large amount of organic acid and heat during the decomposition process, which may cause rooting.
4. The topdressing is too close to the root of the crop. Because the chemical decomposition fertilizer is fast and high, the fertilizer is too close to the root system to cause fertilizer damage.
Second, preventive measures No organic fertilizer is applied. Organic fertilizers must be fermented and then applied. In particular, poultry manure should be fermented with organic fertilizer and fertilizer.
2. Rational use of fertilizers. The use must be measured first and applied at concentration and concentration, especially if the nitrogen fertilizer is not too much at a time. The concentration of foliar spray should not be too high. Urea as a toe fertilizer, the concentration should not exceed 0.3%, spray can be wet.
3. Add organic fertilizer. The organic fertilizer applied to the soil has a strong adsorption capacity for the cation, so that the concentration is not too high, and the buffering ability of the soil nutrient is improved, which can greatly reduce the occurrence of fertilizer damage.
4. Fertilization should be about 10 cm from the root of the crop, and it should be applied deep. Immediately after top dressing, cover the soil to prevent seedling stage burning and loss of fertilizer efficiency. The soil should be fertilized in the dry season and the water should be poured in time to reduce the concentration and avoid the phenomenon of burning.
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