In spring, the temperature is changeable, and the vegetables in the arch shed often face strong cooling, causing different degrees of freezing damage to vegetables. These two methods solve the problem:
1. Temporary increase in insulation measures. In the fair insertion of bamboo arches, covered with a layer of plastic film, forming a pattern of sheds in the shed, the temperature of vegetables in the small arch shed can be increased by 2 ° C ~ 3 ° C.
2. Drug control. It can be divided into two methods: one is to listen to the weather forecast in time, and after knowing that there is a wind blowing news, spray the Yunda 120 on the vegetables in advance; the second is to spray the potassium solution (0.3% brown sugar) on the vegetables before cooling. Mixed with 0.3% potassium dihydrogen phosphate). In the early morning after the occurrence of freezing damage, spraying warm water of 10 ° C ~ 15 ° C on the vegetables can also reduce the occurrence of freezing damage. Do not warm up the fuel in the shed, which is very easy to make vegetables smoke.
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