First, timely soil loosening and rhizosphere soil, increase soil temperature and promote root growth. Second, increase the available phosphorus, potassium fertilizer, in order to increase the cytoplasmic concentration, enhance the plant's ability to resist cold. Early-green beans can be sprayed with potassium dihydrogen phosphate in advance. Third, drain the gutters to prevent freezing of water. Ensure that the "three channels" (edge ​​ditch, waist ditch, ditch) open, no water in the field, so that the water generated after the ice or snow melting can be drained in time. Prevent the formation of ice due to water accumulation, aggravate the occurrence of freezing damage, and hinder root growth. Fourth, cover antifreeze. Straw or straw can be used to cover the plants. However, after the end of the cold wave in general, it must be opened in time to prevent various pests and diseases. It is also possible to spread the ash on the leaves before winter. V. The main remedies for freezing injury are as follows: 1. Frozen seedlings should be increased in fertilization materials to promote more branches and yield by branches; in the flowering period, it should be timely picking top, regulate nutrition, and increase the number of branches and knots. 2, timely check the seedlings after the cold, timely removal of frozen dead leaves, remove the frozen dead seedlings, for the top soil layer when the top soil freezes and thaws, root exposed, seedlings tripping caused by the "root pull" seedlings, soil as soon as possible; when thawing The timely spraying of fresh water on the leaves will have a good effect on dehydration dead seedlings, which can effectively reduce the loss of frost damage. 3. Increase the available nitrogen, phosphorus, and potassium fertilizers. After the disaster, some topdressing nitrogen, phosphorus, and potassium fertilizers were appropriately applied to enhance the repair of frostbite. 4. Strengthen forecasting and prevention of pests and diseases. After freezing, the plants are more susceptible than the normal plants. It is necessary to strengthen the prediction and forecast of diseases and insect pests and pay close attention to the occurrence and development.
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