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塑料大棚环境下生长的蔬菜营养成分及有害物分析 |
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姚 华 严卫丽 李国君 陈 艳 郭 伟
王国荃 徐臻荣 封春玲 刘开泰 靳达莎
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。
关键词 蔬菜 营养 温度
An Analysis of Nutritional and Harmful Components of Vegetables Grown in Plastic Greenhouses
YAO Hua, YAN Weili, LI Guojun, et al. School of Public Health, Xinjiang Medical University, Urumqi 830054
Abstract Objective To study the changes in nutritional and harmful components of vegetables grown in plastic greenhouses. Methods In plastic greenhouses, microclimate and air concentrations of carbon monoxide, carbon dioxide, fluoride and respirable particulate were measured, and chlorophyll, total sugar, crude fiber, nitrite, fluoride, arsenic and some mineral elements in vegetables were determined as compared with those grown in the open-air fields. Results Greenhouse appeared a lower wind speed and darker illumination. Contents of chlorophyll a an b, total chlorophyll, reduced vitamin C, crude fiber in vegetables grown in greenhouse all were lower than those grown in open-air fields. Contents of potassium, calcium, magnesium, iron, zinc, copper and phosphorous were all lower in the vegetables grown in greenhouse than those grown in open-air fields. The contents of chlorophyll reducing Vitamine C. Conclusion Lower wind speed and inadequate illumination in greenhouse affected photosynthesis and uptake of water in vegetables causing changes in their nutritional components. But, no contamination of burning coal was found in vegetables grown in greenhouse.
Key words Vegetables Nutrition Temperature
近几年来，塑料大棚种植蔬菜已得到了广泛推广。本研究在于了解塑料大棚环境下种植的蔬菜同大田蔬菜相比，其有害物含量如何，营养成分有无改变，并试图提出改良措施。
材料与方法
1.材料：选择乌鲁木齐市板房沟乡塑料大棚温室，以及在该环境下种植的蔬菜（包括西红柿、油菜、黄瓜、西葫芦）[1] [2] 下一页
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