The main advantages and disadvantages of the fertilization technology
(1) Main advantages
1 Fertilization is uniform and safe After the fertilization, the distribution of fertilizer in the field is relatively uniform. After the soil is concentrated and fertilized, the concentration of local soil solution is too high, and the rooting problem occurs, which is safe.
2 Fertilization is convenient, does not hurt the roots. There is no need to ditch the fertilization, no damage to the roots, no damage to the soil structure, convenient and trouble-saving, and it is more suitable for the cultivation of vegetable mulching film in the protected area.
3 fast absorption, good fertilizer absorption and utilization, good fertilizer effect.
(2) Main disadvantages
1 The quality and effect of fertilization are affected by the amount of watering. When the watering is insufficient, the concentration of fertilizer is too high, and it is easy to cause fertilizer damage. It is also easy to cause excessive salt concentration on the surface, causing salt damage in the soil. In addition, when the watering is insufficient, the fertilization depth is shallow, which is not conducive to absorption and utilization. When the amount of watering is too large, the nutrients in the fertilizer are lost more and the waste is serious.
2 When fertilizing with volatile fertilizers, it is easy to increase the concentration of harmful gases in the protected area after fertilization, and harmful gas poisoning problems occur.
3 The uniformity of fertilization is relatively poor. Usually, due to the influence of water flow, the amount of residual fertilizer is small. The middle and lower parts of the sputum are relatively concentrated due to the accumulation of fertilizer.
4 The types of fertilizers are stricter. Organic fertilizers and some compound fertilizers are fertilized by the fertilization technique. The residuals on the ground are relatively high and the effect is poor. Therefore, the fertilization technology is generally only applicable to chemical fertilizers with relatively high water solubility.
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