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由于春季天气变化异常,大棚蔬菜常出现不同程度的冻害。冻害严重的要进行毁种,冻害较轻的可采取以下的措施补救。1.灌水保湿灌水可增加土壤热容量,防止地温继续下降。同时,灌水后可以稳定近地表层的大气温度,使气温平稳,利于受冻组织的恢复,从而减轻冻害。2.放风降温大棚蔬菜受冻以后,不能立即闭棚升温,只能放风降温,使棚内温度缓慢上升,让受冻组织逐步吸收因受冻而脱出的水分,从而促进细胞变活,减少组织死亡。3.人工喷水在大棚内用喷雾器喷水,可以增
Due to abnormal changes in the spring weather, greenhouse vegetables often appear different degrees of frost damage. Frost damage to be destroyed, frost damage can take the following measures to remedy. 1. Irrigation Moisturizing irrigation can increase the soil heat capacity, to prevent the ground temperature continues to decline. At the same time, irrigation can stabilize the surface temperature near the atmosphere, so that the temperature is stable, conducive to the recovery of frozen tissue, thereby reducing frost damage. 2. Ventilation and cooling greenhouse vegetables after freezing, can not immediately closed shed heating, cooling only shed, so that shed temperature slowly, so that the frozen tissue gradually absorbed due to freezing and prolapse of water, thereby promoting cell survival and reduce tissue death. 3. Artificial sprinkler water spray in the greenhouse, you can increase