The soil salt damage in greenhouses is increasingly serious and it is necessary to adopt fertilizer measures to adjust them.
Increase organic and biological fertilizers. When fertilizing vegetables in greenhouses, the application amount of organic fertilizer should be increased, and a certain amount of biological fertilizer should be applied. In combination with deep-turning land, the soil structure should be improved to cut off the soil capillary and prevent the accumulation of salt in the surface soil. Deeply plowing the land also helps to improve soil permeability, activate soil, increase ground temperature, accelerate the conversion and absorption of organic manure, increase the activity of biological fertilizers, facilitate the lateral root elongation of vegetable crops, and increase the ability of roots to absorb nutrients and moisture. Its own resistance to salt. Organic manure must be stacked in 3-4 months and thoroughly cooked before it can be used in the greenhouse.
Use chemical fertilizers rationally. Avoid using the same chemical fertilizer in the greenhouse. Single fertilization is one of the main reasons for the increase of soil salinity. Sulfides and chlorides should be used as little or as little as possible, and urea, ammonium nitrate, ammonium phosphate, high-efficiency compound fertilizers, and granular fertilizers can be used. Special attention should be paid so that one application amount cannot be excessive. The basal fertilizers are fully applied with organic fertilizers. Fertilizers are applied during the planting process, and they are applied at the time of planting to avoid surface preparations. They should be applied below the depth of 12-15 cm. Fertilizers can be used alternately with chemical fertilizers and organic fertilizers. Fertilizer depends on the day, seeing the field, watching seedlings, topdressing or flushing, many vegetable farmers after the application of base fertilizer, fertilizer or fertilizer in the growth phase, the lack of scientific attitude, such as heavy rain or continuous cloudy days, should be topdressing, Loosen the soil and promote the roots to squat. If it is sunny and dry, it will enter the result period, and it will be quickly absorbed and applied, and the nutrients will be fully absorbed. It is suitable for the application of humic acid or amino acid fertilizer for rooting and strong seedlings. In the main, as little or no fertilization should be applied as possible to reduce surface salinity.
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