Attentive factors of fertilization in greenhouse

First, farm manure must be mature. Unrotten farm manure contains germs and eggs, which can spread diseases. In addition, if the farm manure is ripened in the shed, ammonia will burn the vegetable seedlings.

Second, fertilization methods should be scientific and reasonable, and should not be applied blindly. It is necessary to cover soil and water in time after topdressing, and do not sprinkle fertilizer directly on the ground or plants, so as to avoid volatilization of fertilizer or burn vegetable seedlings. Appropriate amount of chemical fertilizer and excessive application of chemical fertilizer will easily lead to an increase in salt concentration in the soil and affect the normal growth of vegetables.

Third, micro-fertilizer should be applied in an appropriate amount. Although the demand of trace element fertilizer on vegetables is small, it plays an important role in vegetable metabolism. Micro-fertilizer should be used as base fertilizer, and the dosage must be accurate to avoid fertilizer damage.

Fourth, vegetables in greenhouse under dry conditions should be fertilized cautiously. Fertilization in the case of insufficient water, not only the fertilizer effect can not be brought into full play, but also the concentration of soil solution will suddenly increase, which is easy to make vegetables burn roots.