一、大棚蔬菜不利的环境1、塑料大棚的光照不如露地充足，一般来说，塑料大棚内的透光量为露地自然光量为60％～70％，七。果塑料薄膜老化或粘附了尘土和水珠，则射入的光照就更少了。2、棚内昼夜温度变化快，温差大。在晴天的午后棚内气温可高达40～50C，夜间可降到10C以下， First, the unfavorable environment of greenhouses vegetables 1, plastic shed light enough as exposed, in general, the amount of light in the plastic shed light natural light amount of 60% to 70%, seven. If the plastic film ages or adheres to dust and water drops, the amount of light that enters is less. 2, shed temperature changes in day and night fast, large temperature difference. In the sunny afternoon shed temperature can be as high as 40 ~ 50C, night can be reduced to below 10C,