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徐业梅,张超兰,黎宁,潘艳,何东明,何宇,覃华芳.广西环江县农田土壤重金属空间变异及分布特征[J].广西科学,2018,25(6):701-708. [点击复制]
- XU Yemei,ZHANG Chaolan,LI Ning,PAN Yan,HE Dongming,HE Yu,QIN Huafang.Spatial Variability and Distribution Characteristics of Heavy Metals in Farmland Soils in Huanjiang County, Guangxi[J].Guangxi Sciences,2018,25(6):701-708. [点击复制]
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| 广西环江县农田土壤重金属空间变异及分布特征 |
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徐业梅1,2, 张超兰1, 黎宁2, 潘艳2, 何东明2, 何宇2, 覃华芳2
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| (1.广西大学, 资源环境与材料学院, 广西南宁 530004;2.广西壮族自治区环境监测中心站, 广西南宁 530028) |
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| 摘要: |
| [目的] 对环江县农田土壤重金属含量进行详细调查，摸清重金属含量、空间分布特征，为环江县农业土壤污染综合防治、农产品安全生产提供参考依据。[方法] 通过土壤样品采集及重金属含量分析，结合地统计学及GIS技术，分析土壤重金属空间变异及分布特征。[结果] 研究区土壤中的重金属含量除Cu外，其他均已超出广西背景值，土壤重金属含量的变异系数较大的是Cd、Pb和Zn，其余重金属变异系数相对集中。空间分布上，pH值、Zn的空间相关性较弱，Cd、As、Pb、Cu具有中等程度相关性。结果显示，土壤中pH值呈四周向中间降低的趋势，pH值较高的区域主要集中在水源镇、龙岩镇和长美乡；Cd的含量由西南向东北逐渐减少，高含量区主要是水源镇；As的含量呈西向东的减少趋势，高含量区主要分布在川山镇、水源镇和洛阳镇；Pb和Zn的空间分布相似，高含量区主要集中在川山镇；Cu的分布趋势是由东部、西部向中间减少，高含量区集中在水源镇。[结论] 研究区域的Cd、As、Pb、Zn表现出一定的污染特征，其中Cd是研究区域农田土壤的主要污染元素。不同重金属的分布规律不同，主要是人类活动与土壤母质双重影响的结果。 |
| 关键词: 环江县 农田土壤 重金属 空间分布 地统计学 ArcGIS |
| DOI：10.13656/j.cnki.gxkx.20181225.010 |
| 投稿时间：2018-08-29 |
| 基金项目:广西重金属重点防控区农产品质量及防控对策桂科项目（2014DD29）资助。 |
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| Spatial Variability and Distribution Characteristics of Heavy Metals in Farmland Soils in Huanjiang County, Guangxi |
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XU Yemei1,2, ZHANG Chaolan1, LI Ning2, PAN Yan2, HE Dongming2, HE Yu2, QIN Huafang2
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| (1.School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi, 530004, China;2.Environment Monitoring Center Station of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, 530028, China) |
| Abstract: |
| [Objective] A detailed survey was conducted on the heavy metal content of farmland soil in Huanjiang county, and the heavy metal content and spatial distribution characteristics were found out to provide a reference for the comprehensive prevention and control of agricultural soil pollution and the safe production of agricultural products in Huanjiang county.[Methods] Based on soil sample collection and heavy metal content analysis and combined with geo-statistics and GIS technology, the spatial variability and distribution characteristics of soil heavy metals were analyzed.[Results] The content of heavy metals in the soil of the study area had exceeded the background value of Guangxi except for Cu. The coefficient of variation of soil heavy metal content was Cd, Pb and Zn, and the coefficients of variation of other heavy metals were relatively concentrated. In spatial distribution, the spatial correlation of pH and Zn was weak, and Cd, As, Pb and Cu had moderate correlation. The results of interpolation showed that the pH value in the soil decreased from surroundings towards centre. The higher pH values were mainly concentrated in Shuiyuan town, Longyan town and Changmei town. The content of Cd decreased gradually from southwest to northeast, and the high content was mainly in Shuiyuan town. The content of As was decreasing from west to east, and the high content was mainly distributed in Chuanshan town, Shuiyuan town and Luoyang town. The spatial distribution of Pb and Zn was similar, and the high content area was mainly concentrated in Chuanshan town. The content of Cu was decreasing from the east and the west to the middle, and the high content area was concentrated in the Shuiyuan town.[Conclusion] The Cd, As, Pb, and Zn in the study area showed certain pollution characteristics, and Cd was the main pollution element of farmland soil in the study area. Different heavy metals are distributed differently, which is mainly the result of the dual effects of human activities and soil parent material. |
| Key words: Huanjiang county farmland soil heavy metal spatial distribution ArcGIS |
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