| 基于改进物元可拓模型评价设施菜地土壤重金属污染风险 |
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| 作者姓名： | 贾丽 乔玉辉 陈清 李花粉 邵小明 马和平 |
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| 作者单位： | 中国农业大学资源与环境学院,生物多样性与有机农业北京市重点实验室,北京 100193;西藏农牧学院高原生态研究所,西藏 林芝 860000;西藏林芝高山森林生态系统国家野外科学观测研究站,西藏 林芝 860000;西藏高原森林生态教育部重点实验室,西藏 林芝 860000;中国农业大学资源与环境学院,生物多样性与有机农业北京市重点实验室,北京 100193;中国农业大学资源与环境学院,生物多样性与有机农业北京市重点实验室,北京 100193;西藏农牧学院高原生态研究所,西藏 林芝 860000;西藏农牧学院高原生态研究所,西藏 林芝 860000;西藏林芝高山森林生态系统国家野外科学观测研究站,西藏 林芝 860000;西藏高原森林生态教育部重点实验室,西藏 林芝 860000 |
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| 基金项目： | 现代农业产业技术体系专项资金项目（CARS-23-B16） |
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| 摘 要： | 为解决土壤重金属污染的不确定性和模糊性、传统方法评价结果失真度高、新标准下我国设施菜地土壤重金属风险状况未知等问题，在新出台的土壤环境质量评价标准下，利用改进的物元可拓模型对我国设施菜地土壤重金属污染风险状况进行评价，并将结果与传统评价方法进行对比分析。结果表明：我国绝大多数设施菜地土壤重金属含量处于较低水平；改进物元可拓模型评价结果表明我国设施菜地土壤污染等级以清洁（43.9%）、尚清洁（48.8%）为主，部分样点出现轻度（4.9%）、中度（0.8%）和重度（1.6%）污染，其中Cd、Cu为主要影响因子。在设施菜地土壤重金属污染评价中，改进物元可拓模型评价方法相比于传统评价方法结果更为合理，对进一步防控设施菜田土壤重金属污染更具实际指导意义，且具有可适用性。
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| 关 键 词： | 改进物元可拓模型 设施菜地 土壤 重金属 |
| 收稿时间： | 2019/11/11 0:00:00 |
Assessment of heavy metal pollution risk in greenhouse soil based on an improved matter-element extension model |
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| Authors: | JIA Li QIAO Yu-hui CHEN Qing LI Hua-fen SHAO Xiao-ming MA He-ping |
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| Institution: | College of Resources and Environment Sciences, China Agricultural University, Beijing 100193, China;Research Institute of Tibet Plateau Ecology, Tibet Agriculture&Animal Husbandry University, Nyingchi 860000, China;National Key Station of Field Scientific Observation&Experiment of Alpine Forest Ecology System in Nyingchi Tibet, Nyingchi 860000, China;Tibet Key Laboratory of Forest Ecology, Ministry of Education, Nyingchi 860000, China |
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| Abstract: | To solve problems relating to the uncertainty and ambiguity of soil pollution, the high distortion degree of traditional evaluation method results, and unknown soil pollution risk status in greenhouses, we used an improved matter-element extension model to evaluate the risk status of heavy metal pollution in greenhouse vegetable soil in China. Assessment were made using the new environmental quality standards for soils, and we compared the results with those obtained using the traditional evaluation method. The results indicated that the heavy metal content of soil was at low levels in most greenhouses in China. Results obtained using the improved matter-element extension model assessment indicated that 92.7% of soil samples were clean, whereas a relatively small number of samples were found to indicate a slight(4.9%), moderate(0.8%), or severe(1.6%)risk of soil pollution. Ecological risk was mainly attributed to the heavy metals Cd and Cu. The assessment results obtained using the improved matter-element extension model were found to be more reasonable than those obtained using the traditional evaluation method, thereby indicating that the improved model could be applied for the assessment of soil heavy metal pollution in greenhouses. |
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| Keywords: | improved matter-element extension model greenhouse vegetable soil heavy metal |
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