One is to grasp the temperature management. The temperature in the shed is controlled at 25-30 degrees, and the temperature is adjusted by uncovering the film of the greenhouse film, shed film, straw curtain, etc. The straw should be covered on the shed at night. It must be covered and covered, but neither It's sunny or sunny. Every day, we must persist in exposing the blinds and letting the film shine. On the basis of thermal management, it is necessary to avoid overheating in the daytime sheds, which can be combined with ventilation to reduce the temperature and prevent plant damage due to excessive temperature.
Second, moisture management in winter greenhouses due to the high temperature inside the greenhouse, the temperature outside the greenhouse is low, and the entire greenhouse is in a relatively sealed environment; therefore, evaporation of soil moisture in the greenhouse causes high humidity, which often leads to the spread of vegetable diseases in greenhouses. Therefore, greenhouses are prevented from spreading. Excessive air humidity is the focus of moisture management in winter greenhouses:
1, timely, adequate watering, in the evening, rainy days, cold water before the arrival of the water, watering should be sunny morning, noon ventilation, exhaust water vapor.
2, Ventilation and ventilation, without affecting the temperature conditions in the shed, to early ventilation, diligence and ventilation. Ventilate not only on sunny days, but also on short rainy days. Ventilate after each watering.
3. The mulching inside the shed reduces the evaporation of soil moisture in the shed.
4. More timely cultivating can reduce the evaporation of soil moisture and facilitate root development. At the same time, prevention and control of diseases and insect pests such as gray mold, epidemic disease, downy mildew, aphids, whitefly, etc. should be carried out.
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