The current snowfall and snowfall will come one after another, and the numerous snowflakes will also come to the earth. How to manage pre-snow, snow, and snow greenhouse vegetables is particularly important. It is summarized as follows for the reference of farmers.

I. Pre-winter greenhouse vegetable management measures

1. When the sky is cloudy before snow, it is necessary to uncover the grasshoppers and fight for precious scattered light. 2. The application of organic fertilizer before snow can increase the heat capacity of the soil, buffer the cooling brought about by the loss of heat in cloudy days, and can also promote the root system to improve cold resistance. 3. Moderate control of water before snow is very important to reduce the relative humidity of indoor air. At the same time, it can create a bottom-soil, dry topsoil environment.

Second, snow in the greenhouse vegetable management measures

1. When it's snowing, it's time to put on a good grasshopper, cover the greenhouse in time with a cold-proof film, use a grass rake to block a layer of cold-proof skirts at the front edge of the shed, and close the buffer door tightly to prevent cold wind from entering. 2. The photosynthesis of vegetable crops is very weak when snowing, and there are few photosynthetic products synthesized. In order to reduce respiratory consumption, the night greenhouse temperature should be 2~3°C lower than the nighttime of sunny days. 3. In the case of continuous cloudy snow, the respiratory consumption of vegetables is greater than photosynthesis, and large amounts of harmful gases such as carbon dioxide will accumulate in the greenhouse. Therefore, for more than three days in continuous snowfall, the snow at noon should be released for one hour.

Third, the greenhouse after the snow vegetable management measures

1. The snow on the shed film should be cleared in time after snow to increase the transparency and the amount of light; as long as the temperature does not cause a sharp drop in the temperature of the shed after the exposing, it should be revealed every day. 2. When the sun comes out, if the leaves appear wilting, some grasshoppers should be put down and shading, and they can be placed one at a time. (The shanty who uses the roller blinds can roll the grasshopper to the middle of the shed first, instead of pulling it all open once). After the restoration, the volume is drafted again. If the wilting reappears again, the grasshopper can be put down again. This repeated 2 or 3 times, the general wilting can be restored. 3. If disease has occurred in the greenhouse, conventional spraying will not only increase the humidity in the greenhouse, but also increase the severity of disease. It can be treated with aerosols and dust agents such as chlorothalonil and sulfamate to facilitate uniform application and avoidance of sheds. The air humidity is too high. 4. In order to prevent vegetables from freezing, it is necessary to loosen the soil in time and apply the available fertilizer in appropriate amounts. 0.2% potassium dihydrogen phosphate plus 0.3% calcium nitrate plus 1% glucose can be used to enhance plant resistance; As a result, more plants were harvested in time, and sparse fruit was used to reduce nutrient consumption.

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