江汉平原不同土地利用方式下土壤铜锌铬镍元素含量特征——以沙洋镇为例

Characteristics of Copper,Zinc,Chromium and Nickel Content in Soils with Different Land Use Types in the Jianghan Plain:A Case Study on Shayang Town

为探究不同土地利用方式下沙洋县土壤铜、锌、铬、镍元素的含量特征及其对土地利用的响应,选取研究区内主要七类土地利用方式:水田、旱地、滩涂、林地、草地、水面(湖塘河区)、建设用地,对土壤中的铜、锌、铬、镍元素数据进行统计分析和空间插值。研究表明:沙洋镇土壤铜、锌、铬、镍元素含量平均值分别为27.31、77.21、74.62、32.50 mg/kg。四种元素含量均值在滩涂地块最高,分别达到31.16、80.153、87.906、38.127 mg/kg,四种元素单点最高值分别为52.63、170.387、113.190、55.376 mg/kg,分别出现在水田、建设用地、建设用地、水田。土壤铜、锌元素总体在沙洋镇的中心城区较为聚集,而土壤铬、镍元素没有这类现象。

The aim of this study is to characterize the content of copper,zinc,chromium,and nickel elements in soils of Shayang County under different land use practices and their responses to land use.Seven predominant land use types in the study area,including paddy fields,drylands,mudlats,forested areas,grasslands,water surfaces(lakes,ponds,rivers),and construction sites,are selected for statistical analysis and spatial interpolation ofCu,Zn,Cr and Ni content in soils.Results show that the average values of Cu,Zn,Cr and Ni content of soil in Shayang Town are 27.31,77.21,74.62 and 32.50 mg/kg,respectively.Maximum mean concentrations for these four elements are observed in beach plots,reaching 31.16,80.153,87.906,and 38.127 mg/kg,respectively.The highest single point values for the four elements are 52.63,170.387,113.190,and 55.376 mg/kg,respectively,each found in paddy fields,construction land,construction land,and paddy felds.Copper and zinc elements are generally more aggregated in the central part of Shayang Town,while chromium and nickel elements do not display similar pattern.