In the greenhouse, special attention should be paid to the use of sufficiently mature organic fertilizers such as chicken manure, pig manure, and cake manure. And deep basal fertilizer deep-applied, completed 7 days to 10 days before planting, and the amount of fertilizer should be moderate, mixed with the application of phosphate fertilizer to increase the absorption of ammonia in the soil. In winter greenhouses, ammonium nitrate is tightly sealed, less urea is used, and ammonium bicarbonate, which is easily mixed with ammonia gas, is not used.
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