温室合理设置防寒沟非常重要,但是,目前很多温室不设防寒沟,或者设的防寒沟不合理。温室设置防寒沟是有讲究的,主要有以下几点:一、防寒沟不应设置在棚外前沿,而应该设置在温室内的前沿。挖一道宽40厘米、深40厘米的沟,然后在沟底铺上旧薄膜,再用90厘米宽的桶形 It is very important for the greenhouse to set up cold shelters reasonably. However, at present, many greenhouses do not have cold shelter, or the cold shelter provided is unreasonable. Preventive greenhouse cold setting is stress, mainly in the following points: First, cold ditch should not be set outside the shed, but should be set in the greenhouse front. Dig a 40 cm wide, 40 cm deep groove, and then spread the old film in the ditch, then 90 cm wide barrel