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土壤的空间分布和主要驱动因素在中国东南部的太湖盆地

Han Zhang¹, Zhencheng Ouyang², Manchun Li¹

¹School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China; Key Laboratory of Coastal Zone Exploitation and Protection, Ministry of Natural Resources, Nanjing 210023, China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210023, China; Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210023, China.

Journal of hazardous materials

|December 6, 2023

概括

分析了土壤 (Se) 分布在太湖盆地. 气候和土壤湿度显著影响Se的积累,影响农业和污染风险.

科学领域:

环境科学环境科学
地质化学地质化学
土壤科学土壤科学

背景情况:

(Se) 是一种重要的微量营养素,具有双重作用,在低度时有益,在高度时有害.
了解土壤Se分布及其驱动因素对于生态和农业管理至关重要,特别是在大型盆地范围内.
有限的研究存在于盆地规模的土壤Se动态和影响因素.

研究的目的:

为了调查土壤Se在太湖盆地的空间分布.
确定影响土壤Se积累的关键驱动因素及其相互作用.
为管理Se污染和促进Se丰富农业提供见解.

主要方法:

利用多变量统计,地缘统计,增强回归树和结构方程模型.
分析了1753个来自太湖盆地的地表土样本 (0-20厘米).
评估了土壤Se的空间模式,驱动因素和多变量相互作用.

主要成果:

土壤中的Se度从0.12到57.26毫克/公斤-1不等,平均值为0.90毫克/公斤-1.1.
在土壤Se中观察到南向北的下降趋势,其中1.06%的土壤显示Se污染.
湿度指数 (MI),土壤湿度 (SM) 和积累温度 (AAT0) 是Se积累的主要决定因素.

结论:

气候-土壤相互作用,特别是SM和AAT0的联合作用,显著控制空间Se模式.
海洋丰富和污染的土壤普遍存在于降水量高,MI,SM,AAT0和土壤有机物质高的地区.
这些发现为土壤Se修复策略和可持续的Se丰富农业发展提供了基础.

关键词:

增强的回归树增强的回归树驱动因素驱动因素多变量相互作用是多变量相互作用.土壤中的是土壤中的.空间分布的空间分布太湖湖盆地太湖湖盆地

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