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沽源县地处冀西北坝上高寒区，１２月份平均气温－１３．８℃，１月份平均气温为－１７℃，极端气温达－３９．９℃。多年生产实践证明，在此期间生产蔬菜的日光大棚，管理技术上应掌握以下几点措施：一、加强保温措施，适时揭盖草帘冬季大棚上加盖草帘是主要的保温措施。草帘?
Guyuan County is located in the dam northwest Hebei alpine zone, the average temperature in December - 13.8 ℃, the average January temperature of -17 ℃, the extreme temperature of -39.9 ℃. Years of production practice has proved that in the production of vegetables during the day greenhouse, management techniques should grasp the following measures: First, to strengthen the insulation measures, timely coverage of straw curtain Winter greenhouse straw curtain is the main insulation measures. Straw curtain?