一、多重覆盖,保温防冻。冬季气候寒冷,温度较低,还常常出现大风降温天气,因此搞好防寒保温工作,使蔬菜免受低温伤害是冬季大棚蔬菜管理的关键。生产上通常采用多重覆盖栽培技术,就是在地面覆盖地膜,增加土壤的容热量;在棚膜上盖草帘,在草帘上再加盖一层塑料薄膜,可防止雨水淋湿草帘,可有效提高室内温度。通过这样多重覆盖,大棚内温度可以增加3℃至5℃,具有很好的防寒 First, multiple coverage, insulation antifreeze. Winter climate is cold, the temperature is low, but also often gale cool weather, so do a good job of cold insulation, so that vegetables from low temperature damage is the key to greenhouse vegetable management in winter. Production is usually covered with multiple cultivation techniques, is to cover the ground in the ground, increasing the amount of soil heat; straw curtain covered in greenhouse film, straw curtain and then covered with a layer of plastic film to prevent rain wet grass curtain, wet Effectively increase the indoor temperature. Through such multiple coverage, the greenhouse temperature can be increased by 3 ℃ to 5 ℃, with good cold