摘要
沙洋镇位于沙洋“金土地”一期项目调查区的南部,在本研究项目工区沙洋镇、马良镇、高阳镇三镇中土地利用方式最为丰富。为了发现不同土地利用方式下土壤汞元素的含量特征,以及揭示在小范围内土壤汞对土地利用的响应,选取研究区中主要七类土地利用方式,即水田、旱地、滩涂、林地、草地、水面、建设用地,将不同土地利用方式下采样的土壤汞金属数据进行统计分析和空间克里金插值成图,结果表明,土壤汞元素在不同土地利用情况下含量有显著差异;汞元素在水田土壤含量均值最高,达到0.078 mg/kg,其次是滩涂,其均值是滩涂用地土壤的1.04倍,是建设用地土壤的1.13倍,是旱地土壤的1.66倍,是草地土壤的1.85倍,是水域土壤的1.96倍,是林地土壤的2.03倍;土壤汞元素在城市建设用地中均出现了最高值,其次是水田。在今后的土壤汞环境治理中应予以高度重视水田和建设用地两类土地利用方式,林地和水面土地利用方式下土壤汞元素含量较少。在沙洋城市建设用地中增加林木绿化,对发生汞增多的水田进行水域化改造,或许可以避免土壤汞过量风险。
Shayang Town is located in the south of the investigation area of the first phase of Shayang Golden Land Project,and the land use pattern is the most abundant among the three towns in the research project area.The purpose of this study was to discover the accumulation characteristics of soil mercury under different land use patterns and to reveal the response of soil mercury to land use in a small scale.Seven main land use types were selected in the study area:paddy field,dry land,beach,woodland,grassland,water surface and construction land.The mercury metal data of soil samples under seven land use types were analyzed and mapped by spatial Kriging interpolation.The results show there are significant differences in mercury content in soil under different land use conditions.Secondly,the average content of mercury in paddy soil is the highest,reaching 0.078 mg/kg,followed by beach and construction land,which is 1.04 times of beach land,1.13 times of construction land,1.66 times of dry land,1.85 times of grassland soil,1.96 times of water area soil and 2.03 times of forest land soil.Thirdly,soil mercury appeared the highest value in urban construction land,followed by paddy field.Paddy field and construction land should be paid more attention to in future environmental management of soil mercury.The mercury content of soil under forest land and surface land use is less.Therefore,forest green can be used in construction land in the treatment of soil mercury and heavy metals.The risk of heavy metals in soil can be reduced by water washing and transformation of paddy fields.
作者
袁知洋
谭文专
项剑桥
杨军
黄彬
潘飞
李春诚
段碧辉
Yuan Zhiyang;Tan Wenzhuan;Xiang Jianqiao;Yang Jun;Huang Bin;Pan Fei;Li Chuncheng;Duan Bihui(Hubei Institute of Geoscience,Wuhan,Hubei 430034;Hubei Test Center of Selenium Ecological Environment Effect,Wuhan,Hubei 430034)
出处
《资源环境与工程》
2019年第S01期32-35,共4页
Resources Environment & Engineering
基金
湖北省沙洋县土地质量地球化学评价(编号:HBJTD20170108))
湖北省地质科技项目恩施富硒高镉土壤区农作物硒镉效应研究(编号:KJ2016-8)
关键词
土地利用方式
土壤
汞元素
沙洋
land use pattern
soil
mercury element
Shayang county
