几年来,我市大力发展塑料棚蔬菜生产,随着生产面积的扩大,种植种类的增加,栽培技术的改进,大棚蔬菜单产水平也不断提高,对解决我市淡季鲜菜供应起到一定作用。但是,由于塑料棚内的小气候条件是人工创造的,与露地自然环境有很大差异。覆盖薄膜后,土壤和作物接触不到雨水和风,棚内经常出现高温、低温、和日照不足等不 Over the past few years, the city vigorously develop plastic shed vegetable production, with the expansion of production area, planting species increase, cultivation techniques, greenhouse vegetable yield levels are also rising, to solve the city’s seasonal supply of fresh vegetables play a role. However, since the microclimate conditions in the plastic shed are artificially created, it is quite different from the natural environment of the open ground. After covering the film, soil and crops can not be exposed to rain and wind, the shed often appear high temperature, low temperature, and lack of sunshine, etc.