Winter greenhouse vegetable fertilization should pay attention

After the organic fertilizer is decomposed, fresh pig calves, human excreta, green manures, and crop stalks are applied. After the rots are applied, large amounts of organic acids, ammonia, hydrogen sulfide, nitrogen oxides and the like will be generated, which will not only harm Vegetable roots, and ammonia, nitrogen oxides, etc., that escape from the soil, accumulate in greenhouses and cause poisoning to vegetables.

The potassium chloride, potassium sulfate, ammonium chloride, and ammonium sulfate commonly used for soil fertigation are applied to the soil and dissociate out of sulfate ions, chloride ions, etc. are absorbed and seldom used, and when applied in general vegetable fields and fields, Lost with water, reduce the harm. However, in greenhouses, they often accumulate in the soil and increase the acidification of acidic soils. Therefore, acidic soils should not be applied, and they can be applied to alkaline soils. Calcium, magnesium phosphate fertilizers, lime nitrogen, etc. are alkaline fertilizers, and are not suitable for alkaline soils. Applied topically, it can be applied to acidic soils.

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