Remedial measures for freezing of greenhouse vegetables

It is necessary to water in time after freezing injury occurs. Watering can increase soil heat capacity, stabilize surface and greenhouse air temperature, restrain the decline of ground temperature, and effectively reduce and control the development of freezing injury. Watering water to reach the plough layer is appropriate, do not flood irrigation, lest low temperature and high humidity lead to vegetable root retting.

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 greenhouse temperature rises slowly, so that the frozen tissue can fully absorb water, promote cell resurrection and reduce tissue death.

After the occurrence of freezing injury, the frozen stems and leaves should be cut off in time to avoid mildew and disease of the frozen tissue.

Setting up a shed for shade in the shed can prevent frozen vegetables from losing water due to direct sunlight.

Appropriate amount of available fertilizer can be applied to frozen plants combined with watering, which can improve the nutritional status of crops, enhance the ability of cold resistance and freezing resistance, and promote the early recovery of plant growth.

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. When spraying foliar fertilizer, the effect of adding appropriate amount of gibberellin is better.

After the plant is frozen, diseases and pests are easy to swoop in, so some protective agents and insecticides should be sprayed in time.