1, organic fertilizer dried. Human feces and chicken manure have become the main basal fertilizers for producing vegetables in greenhouses. However, for the convenience of application, vegetable farmers frequently dry human feces and chicken manure in the fields and dry them up. This practice will cause fly maggots to reproduce, nitrogen will volatilize, and fertilizer will lose nitrogen nutrients. 2. Calcium, magnesium, and phosphorus are used as basic fertilizers on alkaline soils. Calcium, magnesium, and phosphorus are weakly acidic fertilizers that are insoluble in water and can only be gradually converted into water-soluble phosphates in the roots of crops under weak acid conditions, but can be applied to alkaline soils; the urgent need for phosphorus in crop seedlings cannot be solved, resulting in physiological deficiencies. phosphorus. 3, superphosphate surface withdrawal for top dressing. Phosphorus is less mobile in the soil, generally 0.5 centimeters at the point of application, and the range of motion is between 1 and 3 centimeters. Therefore, it is difficult to reach the rhizosphere of crops and therefore does not provide the effect of phosphorus in supplementary crops. 4, water immediately after urea application. Urea is amido ammonia nitrogen fertilizer, soluble in water, applied to the soil after decomposition can be converted to ammonium bicarbonate, was absorbed by the crop, water immediately after the form of application, easy to make urea with water loss, reduce fertilizer efficiency. 5. Ammonium bicarbonate is applied with water. This method often results in more fertilizer in the intake, different crop growth, and difficulty in management. In the afternoon, the greenhouse temperature rises, ammonia gas escapes from the soil, and the lower leaves of the crop are smoked, resulting in fertilizer damage.
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