In order to prevent the occurrence of fertilizer damage in greenhouses, we must pay attention to the following points: Fertilization in scientific fertilization sheds should be dominated by base fertilizers, supplemented by topdressing. If you need topdressing, you should adhere to the principle of “eat less and more mealsâ€, that is, more times and less dosage, topdressing urea or ammonium sulfate 5 to 10 kilograms per acre, covering the soil about 10 centimeters thick after application, and immediately pouring water. water. Do not use ammonium bicarbonate when fertilizing. Ventilation Ventilation Open the vent at a high temperature during noondays to allow the air in the shed to circulate and reduce the amount of harmful gases in the shed. Strengthen the management of plastic greenhouses or greenhouses that are directly heated by fire and the combustion materials should be fully burned. At the same time, attention should be paid to the ventilation of greenhouses.
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