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温室,果园,谷物田和森林/草原土壤中的各种输入来源影响的有毒元素污染风险

Zhikun Chen¹, Muhammad Imran¹, Guanghua Jing¹

¹Key Laboratory of Soil Resource &Biotech Application, Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province), Xi'an, 710061, China; Xi 'an Ecological Monitoring and Restoration Engineering Technology Research Center, Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province), Xi'an, 710061, China.

Environmental pollution (Barking, Essex : 1987)

|October 1, 2023

概括

强化农业增加了土壤中有毒元素的积累,对生态系统和健康构成风险. 温室土壤的高肥料输入显示显著的和污染,需要谨慎管理,以尽量减少污染.

科学领域:

环境科学环境科学
土壤科学土壤科学
农业科学农业科学

背景情况:

由粮食需求驱动的密集农业实践导致有毒元素的积累,威胁到生态系统和人类健康.
了解不同农业系统对有毒元素污染的脆弱性,对于可持续的土地管理至关重要.

研究的目的:

评估中国山西省各种农业系统 (温室,果园,谷物田,森林/草原) 中的有毒元素污染和生态风险.
确定有毒元素的来源及其与农业投入和土壤特性之间的关系.

主要方法:

从181个地点收集和分析了土壤样本,检测有毒元素 (As,Cd,Cr,Cu,Hg,Pb,Zn) 和土壤特性.
计算的污染因子 (CFx),累计污染负载指数 (PLI) 和累计生态风险指数 (RI).
利用皮尔森相关性,正矩阵因数分解 (PMF) 和部分最小平方结构方程建模 (PLS-SEM) 来确定来源和影响因素.

主要成果:

所有分析的有毒元素都超过了背景值, (Cd) 和 (Hg) 的污染水平更高.
温室和森林/草原土壤表现出适度的生态风险,而果园和谷物田的风险较低.
有毒元素 (Cd,Hg,Cu,Zn) 与土壤有机物,,和有显著的相关性;农业投入被确定为耕地的主要来源.

结论:

温室种植中的高肥料投入大大促进了有毒元素的积累,应该仔细管理.
农业实践是耕地中有毒元素污染的主要驱动因素,需要有针对性的缓解策略.
了解土壤特性和农业投入是控制有毒元素污染和减少生态风险的关键.

关键词:

农业农业系统农业系统生态风险生态风险有毒元素的来源有毒元素的来源有毒元素污染负载有毒元素污染负载不平等的输入不平等的输入

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