In greenhouse vegetables, organic fertilizer should be added, because organic fertilizer can not only improve the soil and provide nutrients, but also, in the process of decomposition and utilization, can generate carbon dioxide, accumulate in the greenhouse, and can add “gas fertilizer†to the vegetables. It will help improve the photosynthesis of vegetables and increase the yield of vegetables. The following technical points should be grasped during fertilization:
First, the application of organic fertilizer to maturity
Because fresh pig calf, manure, green manure and crop stalks, etc., after application in the decay process, will produce a lot of organic acids, ammonia, hydrogen sulfide, nitrogen oxides, etc., not only will damage the vegetable root system, but also Soil ammonia, nitrogen oxides, etc. accumulate in the greenhouse and poison the vegetables.
Second, due to soil fertilization
Commonly used potassium chloride, potassium sulfate, ammonium chloride, ammonium sulfate, etc., applied to the soil, the dissociation of sulfate ions, chloride ions, etc. are absorbed and utilized very little, in the general vegetable field, field application, with the water Loss, reduce 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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