Temperature and humidity are undoubtedly the key and difficult aspects of vegetable management in winter greenhouses. The author believes that the greenhouse temperature should be 2°C~3°C higher than the upper limit of the crop's suitable temperature, especially after entering the deep winter season. Strengthen the insulation, cold and frost. In winter, the climate is cold, the temperature is low, and there is often a strong wind to cool the weather. Therefore, it is very important for the management of vegetables in winter greenhouses to do well in cold insulation work to protect vegetables from low temperatures. Multi-coverage cultivation techniques are commonly used in production, that is, to cover the ground film on the ground to increase the heat capacity of the soil; to cover the straw film on the shed film, and to cover the straw curtain with a layer of plastic film to prevent the rain from wetting the straw curtain. Increase indoor temperature. Through multiple coverage, the temperature in the greenhouse can be increased by 3 °C ~ 5 °C, with a good cold insulation effect. In case of strong cooling weather, temporary warming measures should be taken (when heating, care should be taken that the temperature should be controlled on the principle that the plants should not be frozen, and the temperature cannot rise too high, especially to properly control the night temperature). Science hanging thermometer. The thermometer in the shed is mostly hung on the upper part of the plant. The air temperature in different parts of the day is basically in direct proportion to the altitude, especially when the plants are flourishing and high. Due to the shading effect of branches and leaves, the temperature gradient from the point of growth to the ground is very obvious. Take lightening measures to increase the light intensity and extend the lighting time. The measures are: First, replace the new film and keep it clean. Available green bamboo EVA film, Thai light, Xifeng and other high transmittance of the agricultural film, and frequently wipe the agricultural film to ensure the clean surface of the agricultural film. The second is mulch film coverage. It needs to be emphasized here that white mulch film should be covered instead of black mulch film. Due to the reflection of the white plastic film, the light intensity of the lower part of the plant can be enhanced, while the black plastic film absorbs light. Third, the rear wall hanging light curtain. The fourth is timely pruning and picking leaves to enhance the transparency of the field. Reduce humidity. Excessive humidity in the shed is the main cause of the culprit, so reduce the humidity in the shed by the following two methods. First, the method can reduce the evaporation of soil moisture and reduce the humidity in the greenhouse by means of planting lines covering the plastic film and operating lines covering the wheat straw, or covering the plastic film in the entire greenhouse. The second method is to use two ventilation methods to exclude moisture in the shed while eliminating harmful gases in the shed and increasing the carbon dioxide concentration in the shed. Medical Supplies,High Quality Medical Supplies,Medical Supplies Details, CN Dongguan City Risen Medical Products Co., Ltd. , https://www.risenppe.com