Winter crop field management measures after heavy snowfall

1. Cover the straw, keep warm and freeze. Immediately before snowfall, the rice straw is evenly covered in rapeseed, silkworm pea rows, wheat ridges and open field vegetables to improve the ground temperature, protect the plants, prevent freezing damage, and also fertilize the soil. Where conditions permit, it is also possible to apply grass ash to improve the plant's ability to resist freezing. Do a good job of covering and insulating crops such as greenhouse vegetables to prevent freezing damage. Conditional measures such as irrigation, heating and heating, and burning of smoke can be adopted. The exposed vegetables can cover the straw and shade nets on the floating surface to reduce the occurrence of freezing damage.

2, timely harvest, grab a portion of vegetables, to avoid freezing damage, snow pressure, to ensure the supply of vegetables, improve economic efficiency.

3. Catch the snow in time to reduce the freezing damage. Heavy snow can crush winter crops and increase frost damage. It is necessary to go to the field to catch snow in time to prevent mechanical damage to winter crops and reduce frost damage. According to the situation, it is necessary to take measures such as snow sweeping, snow shoveling, salting snow, warming snow in the shed; if the heavy snow is too strong, the above measures will not work, and the greenhouse will collapse, and the greenhouse insulation will be abandoned. In addition to the cover in the shed, the relatively high temperature of the soil is used to increase the temperature in the shed to reduce snow; in the absence of other measures, it is necessary to take measures to prevent the large-scale collapse of the continuous shed according to the load of the greenhouse. To do a good job in the reinforcement of greenhouses and other facilities, it is necessary to send special personnel to protect the vegetable greenhouses, especially in the evening to remove the snow on the greenhouses to prevent the collapse of the greenhouses.

4. Clean up the ditches to prevent waterlogging. Heavy snow easily causes the soil of the ditch to collapse. After the snow, the ditch should be cleaned immediately to eliminate the accumulated water, improve the vitality of the root system and prevent waterlogging. It is necessary to remove the snow from the greenhouse in time. The snow on both sides of the greenhouse should also be removed in time to prevent a large amount of heat from being absorbed during melting and reduce the temperature inside the shed, and drain the ditch in time to prevent waterlogging.

5, greenhouse vegetables should be covered with straw curtains, non-woven fabrics, shade nets or multi-layer cover and other insulation measures, if necessary, take measures such as smoking or temporary warming. Continuous low-temperature weather should also take advantage of the high temperature during the daytime, and timely remove the cover, straw, sunshade and other coverings in the shed to allow the crop to see light for a short time, and timely ventilation to reduce the air humidity in the greenhouse and improve crop resistance. .

6. Apply fertilizer to promote growth. After heavy snowfall, apply appropriate amount of quick-acting nitrogen fertilizer and phosphorus and potassium fertilizer to the heavier frozen field to promote the plant to resume growth as soon as possible. After the snow, the greenhouse should pay attention to returning to the curtain in time to prevent wilting. That is, many days of snowy weather, the temperature inside the greenhouse is very low. Once it encounters a sunny day, the temperature in the shed will rise rapidly, and the temperature of the soil will rise relatively slowly, causing the temperature to be high, and the transpiration of the leaves will also accelerate. The soil temperature is low, the root water absorption is weak, the plant is prone to wilting, and the death is serious, especially the frozen crops and seedlings are weakly resistant, improperly managed, and it is easy to cause the plants to freeze in cold weather. The phenomenon of fine weather and all deaths. Therefore, in the case of a long cloudy weather, you should pay attention to the curtain, that is, first remove a few, so that the indoor temperature rises slowly, and pay attention to the performance of the blade. If the leaves are normal, gradually increase the number of grass curtains until they are fully uncovered; if any wilting occurs, cover them with several straw curtains in time to allow the crops to adapt.

7, winter crops after snow should be timely to prevent the occurrence of diseases. Greenhouse crops should focus on the management of temperature and humidity and the ratio of nitrogen, phosphorus and potassium fertilizers. In particular, nitrogen fertilizer should not be applied, pay attention to the application of organic fertilizer. Continuous rain, snow and cold weather, the humidity in the shed is large, we must pay attention to the occurrence and spread of vegetable melon diseases and gray mold.