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一、防寒措施1.临时加温当大棚内温度白天低于15℃、夜间低于5℃时,就有可能发生寒害或冻害。夜间要采取临时加温措施,人工增温。2.加强肥水管理灌水可提高棚内土壤和空气湿度,有一定的防寒效果,灌水后蔬菜在4℃时不受冻害。同时用醋、白糖、过磷酸钙配成
First, the cold measures 1. Temporary heating When the temperature inside the greenhouse during the day and below 15 ℃, less than 5 ℃ at night, there may be cold damage or frost damage. At night to take temporary heating measures, artificial warming. 2. Strengthen the management of fertilizer and water irrigation can improve shed soil and air humidity, a certain degree of cold effect, after irrigation vegetables at 4 ℃ without frost damage. At the same time with vinegar, sugar, superphosphate dubbed