【摘要】 目的研究塑料大棚环境下生长的蔬菜中有害物质含量及营养成分的改变。方法分别测定大棚环境的微小气候，空气中CO、CO2、氟、可吸入颗粒物浓度及大棚蔬菜中叶绿素、总糖、粗纤维、亚硝酸盐、氟、砷的含量及矿物元素含量，并与大田环境相比较。结果大棚环境呈现低风速、低照度的特点。大棚蔬菜中叶绿素a、叶绿素b、总叶绿素、还原性维生素C、粗纤维含量均低于大田同种蔬菜；矿物元素钾、钠、钙、镁、铁、锌、铜、磷含量也低于同种大田蔬菜。结论大棚环境的低风速、低照度影响了蔬菜的光合作用及对水分的吸收，从而造成营养成分的改变。未发现大棚燃煤对蔬菜的污染。更多还原

【Abstract】 Objective To study the changes in nutrihonal and the compenents of vegetables grown inplastic greenhouses. Methods In plastic greenhouses, microclimate and air concentration of carbon monoxide,carbon dioxide, fluoride and respirable particulate were measured, and chlorophyll, total sugar, crude fiber, intrite, fluoride, arsenic and some mineral elements in vegetables were determined as compared with those grown inthe open-air fields. Results Greenhouse appeared a lower wind speed and darker illumination. Contents ofchlorophyll a an b, total chlorophyll, reduced vitamin C, crude fiber vegetables, grown in greenhouse all werelower than thase groWn in 0pen-alr fields. Contents 0f potaSSurn, calcium, magneSurn, iron, kinc, coPper andphosphorous were all lower in the vegetables grown in greenhouse that those grow in open-air fields. The contentsof chlorophyll reducing Vitamine C. Conclusion Lower wind speed and inadequate illumination in greenhouse affectal photosynthesis and uptake of water in vegetables causing changes in their nutritional components.But,contamination of burning coal was found in vegetables grown in greenhouse.更多还原