The greenhouse vegetables can be remedied when they are frozen.

1. Artificial water spray. Once the vegetables in the greenhouse are frozen, they can spray water on the vegetables with a sprayer in the greenhouse, which can increase the air humidity in the shed, stabilize the indoor temperature, restrain the water evaporation of the frozen tissue of vegetables, and promote the frozen tissue to absorb water and restore its vitality.

two。 Keep a lookout and cool down. After the freezing injury of greenhouse vegetables, the greenhouse can not be closed to heat up immediately, if the temperature is too fast, the frozen tissue will dehydrate and die. The correct method is to let the air cool down, so that the temperature in the shed rises slowly, and the frozen tissue is given sufficient time to absorb the water removed by freezing, so as to promote cell resurrection and reduce tissue necrosis.

3. Cut off the dead branches. Cut off the frozen stems and leaves in time to avoid mildew and disease of the frozen tissue.

4. Set up a shed to shade. Build a shed to shade in the shed to prevent frozen vegetables from direct sunlight and slow down the degree of water loss of frozen tissue.

5. Fattening. After slowing down the seedlings of frozen plants, it is necessary to apply appropriate amount of available fertilizer in time, which can improve the nutritional status of vegetables and enhance the ability of cold resistance and freezing resistance of plants. Foliar spraying saves fertilizer and the fertilizer effect is faster than soil topdressing, so it should be sprayed reasonably according to the fertilizer demand characteristics of different crops.

6. Apply medicine to prevent disease. After the plant is frozen, the disease is easy to swoop in, so some protective agents and pest control agents should be sprayed in time, such as 80% mancozeb 500 times solution, 64% poison alum and so on. At the same time, a fumigant was placed in the shed to kill the germs in the shed.

Sun Lili Ren Meihong of Chengde County Agriculture and Animal Husbandry Bureau