How do snow weather manage the field?
Heavy snow can alleviate winter drought, kill some wintering pests and germs, and reduce pests and diseases in spring. However, heavy snow can cause frost damage. All localities must take urgent action, take effective measures to seek advantages and avoid disadvantages, strive to reduce the negative impact of heavy snowfall on winter agricultural production, and focus on the following field management measures: 1, cover straw, warm antifreeze. Immediately before snowfall, straw is evenly covered in rapeseed, silkworm pea pods, wheat ridges and open field vegetables to increase the ground temperature, protect plants, prevent freezing damage, and fertility. Where conditions permit, it is also possible to apply ash to improve the plant's ability to resist freezing. Do a good job of covering and insulating greenhouses and other crops to prevent freezing damage. Conditions can be taken irrigation, heating electric heating, smoke and other measures, open-surface vegetables can be covered with straw floating surface, shade net, etc., to reduce the occurrence of frost damage. 2, timely harvest, grab a portion of vegetables, to avoid freezing damage, snow pressure, to protect the supply of vegetables, improve economic efficiency. 3, timely snow, reduce frost damage. Heavy snow will crush winter crops and increase frost damage. It is necessary to mobilize people in time to catch snow in the fields to prevent winter crops from mechanical damage and reduce frost damage. The multi-storied greenhouses should take measures such as snow sweeping, snow shoveling, salting and snowing, and snowing in sheds according to the situation; if the snow is too fierce, the above measures will not work, the greenhouses will collapse, and the heat insulation of crops within the shed will be abandoned. In addition to the shed cover, the use of relatively high temperatures in the soil to increase the temperature within the shed to snow; in the absence of other measures, according to the shed load timely measures to protect the scaffolding to avoid the occurrence of large-scale collapse of multi-span sheds. To do a good job in the reinforcement of greenhouses and other facilities, special personnel should be assigned to take care of the vegetable greenhouses. In particular, the snow on the greenhouses must be removed in time to prevent the collapse of the greenhouses. Fruit trees, seedlings, etc. are shaken off in a timely manner to prevent snow from accumulating in large pressure collapsed sheds and branches. 4, clean up the ditch to prevent waterlogging. Snow can easily cause the ditch to collapse. After the snow, it should immediately clear the ditch, remove the accumulated water, increase the vitality of the roots, and prevent the occurrence of waterlogging. To clear the snow on the shed. The snow on both sides of the greenhouse should also be removed in time to prevent absorption of large amounts of heat while melting to reduce the temperature inside the shed, and to drain water in time to prevent waterlogging. 5, greenhouse vegetables to cover straw, non-woven fabrics, shade nets or multi-layer coverings and other insulation measures, if necessary, take smoke or temporary temperature and other measures. Continuous low-temperature weather also needs to use high temperatures at noon during the day, promptly uncover sheds, non-woven fabrics, awning nets and other coverings to allow crops to see light for a short time, and timely ventilation to reduce air humidity in greenhouses and improve crop resistance. . 6, chase fertilizer material, promote growth. After heavy snowfall, appropriate amount of available nitrogen fertilizers and phosphorus and potassium fertilizers were applied to the heavily frozen blocks to promote the recovery of the plants as soon as possible. After a snowstorm in the snow, it is necessary to pay attention to the curtains in a timely manner to prevent wilting. In the snowy days of many days, the temperature in the greenhouse is very low. Once it is sunny, the temperature in the greenhouse will increase rapidly, and the temperature of the soil will rise relatively slowly, resulting in high temperatures and transpiration of the leaf water. , And the soil temperature is low, the water absorption capacity of the root is weak, the plants are prone to wilting, serious death, especially the resistance of the frozen crops, seedlings is very weak, improper management, it is easy to cause the plant to die without cold weather However, the weather is all but dead. Therefore, in the event of a long and chilly weather, we should pay attention to the retracement, that is, we should first expose a few articles, so that the indoor temperature will rise slowly, and observe the performance of the leaves. If the leaves are normal, then gradually increase the number of uncovering the grass until all are uncovered; if there is a phenomenon of wilting, a few grass curtains shall be promptly covered to allow the crop to adapt. 7. After winter, the winter crops must be prevented and prevented from occurring. Greenhouse crops should focus on the management of temperature and humidity and the proportion of nitrogen, phosphorus and potassium fertilizers. In particular, nitrogen fertilizers must not be biased and attention should be paid to the application of organic fertilizers. Continuous rain, snow and cold weather, the humidity in the shed is relatively large, and attention should be paid to the occurrence and spread of vegetable melons and botrytis. 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