Prevention of fertilizer damage and its remediation technology

Fertilizer is the grain of crops. Rational fertilization can not only maintain and improve soil fertility, but also increase crop yield and improve quality. However, due to the improper use of fertilizer varieties and application methods in agricultural production, the occurrence of fertilizers has occurred. Recently, I have stood. According to the survey of many farmers, according to our investigation, most of the fields affected by the fertilizer are heavy in soil, shallow in soil, high-concentration compound fertilizer or urea, and the application rate is 20-30 kg/mu. Or acupoint application, the length of the strip is 40-50 cm, the depth is 5-10 cm, the application time is in the middle and late December of last year, and the leaves appear one month after the application. Now, the fertilization point is dug, and more fertilizer is visible. The root layer ", the roots have rotted and peeled. The main reason is that the fertilizer application is concentrated and located in the most active layer of the root system. After application, the local soil solution osmotic pressure is too high, causing salt damage to the plant, causing root damage to the root system, so that the root injury absorbs water and absorbs fertilizer. Drought, dry soil, digging a hole, and applying a light rain after the application, increased the occurrence of fat damage.

Remedial measures should be taken for the occurrence of fat damage, the soil in the fertilization site should be excavated, the soil in the hole should be poured with clean water, the concentration of soil fertilizer solution should be diluted, and the coarse roots that have been rotted should be cut off, and the new soil will be covered. The branches are trimmed.

To prevent the occurrence of fertilizer damage, it is necessary to achieve reasonable fertilization:

1. Reasonable selection of fertilizer varieties. Perennial economic crops should be mainly composed of soil and organic fertilizers. Fertilizers and organic fertilizers should be mixed and applied. Soil and fertilizers and organic fertilizers can provide various nutrients, improve soil and improve soil. Buffering capacity to reduce the occurrence of fat damage. The same is chemical fertilizer, containing chlorinated fertilizer is the most prone to fat damage, there are many varieties of fertilizer on the market, the quality is not abandon, the majority of farmers should pay special attention when choosing.

2, improve the fertilization method, winter and spring base fertilizer should be applied in the outer ring of the canopy, the depth and width of the ditch are 20-30 cm, after the application of soil, when the fertilizer is applied as a top dressing, it should be poured with water, or when the soil is wet after rain. Apply.

3. Control the amount of fertilizer, especially nitrogen fertilizer. For the average plant producing 50 kilograms of orange and pear trees, the urea should not exceed 100 grams per plant, and the other nitrogen fertilizers should not exceed 250-300 grams. More than 25 kg, a small number of multiple applications should be promoted for young and sick fruit trees.

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