Cold protection and warming measures for vegetables in greenhouses
1. Prior to the arrival of cold air, it is necessary to do a good job in keeping warm the tall crops. At present, there are many tall crops in the shed, such as tomatoes and cucumbers. Tall crops cannot be covered with small arch sheds, nor can they be covered with foliage. Therefore, it is recommended that two layers of film be prepared before cold air arrives. 2. For the lettuces and other vegetables currently in the shed, a layer of thermal insulation facilities is not safe enough, because they each have temperature requirements. Lettuce, lettuce, etc. stop growing below 5 ° C, and may even be frozen when the temperature reaches minus zero. Therefore, these vegetables can be used to maintain warmth according to their own facilities, such as adding small sheds and adding cover. 3. Sometimes it is raining and snowing, and the temperature is below zero, the vegetables in the shed are not easy to be frozen, but the frost damage is easy to occur in the weather after the rain is sunny or after the snow is sunny. Because the frost after the first clearing is particularly heavy, this kind of weather needs special attention. It is recommended to increase the cover during the first clearing. Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone
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