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Position: Home > Articles > Spatial Distribution of Soil Salinity in a Degraded Wetland of Xiaopo Lake Based on EMI Journal of Soil and Water Conservation 2016,30 (6) 284-288

基于EMI的小泊湖退化湿地土壤盐分的空间分布

作  者：
魏俊奇;李小雁;蒋志云;刘磊;肖雄
单  位：
北京师范大学资源学院
关键词：
EM38;土壤盐分;土壤电导率;青海湖
摘  要：
采用电磁感应(EMI)、地统计学半变异函数和Kriging空间插值方法研究小泊湖退化湿地土壤盐分的空间分布。结果表明:土壤表观电导率(ECa)和0—40cm土壤盐分含量呈线性显著正相关,说明在小泊湖湿地土壤表观电导率的变化可以用以反映土壤盐分含量的变化;半变异函数分析表明,土壤盐分具有强空间相关性[C/(C0+C)>0.5],其空间分布主要是由结构性因素引起的;高斯模型(R2=0.98)插值土壤盐分表明,土壤盐分空间分布与退化湿地的空间分布表现出明显的一致性,放牧活动强烈的退化区域土壤盐分相对较高,说明小泊湖湿地退化后土壤盐分含量高于未退化湿地,土壤盐分含量在一定程度上能反映湿地退化的程度,可为湿地退化防治监测提供依据。
译  名：
Spatial Distribution of Soil Salinity in a Degraded Wetland of Xiaopo Lake Based on EMI
作  者：
WEI Junqi;LI Xiaoyan;JIANG Zhiyun;LIU Lei;XIAO Xiong;College of Resources Science and Technology,Beijing Normal University;State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University;
关键词：
EM 38;;soil salinity;;soil electrical conductivity;;Qinghai Lake
摘  要：
In this study,we studied the spatial distribution of soil salinity in a degraded wetland of Xiaopo Lake based on a combined method of electromagnetic induction(EMI)with semi-variation function in the Geo-statistical methods and the Kriging of the spatial interpolation.Significant correlation between the apparent electrical conductivity and soil salinity content indicated that apparent electrical conductivity could be used to characterize the variation of soil salinity in the degraded wetland.The result of semi-variation function showed that there was a strong spatial autocorrelation(C/(C0+C)>0.5)for the spatial distribution of soil salinity,which meant that the distribution of salinity was mainly caused by the structural factors.By interpolating soil salinity with Kriging method,we found that the spatial distribution of soil salinity was obviously consistent with the spatial pattern of the degraded wetland,and the areas with high soil salt content were the areas where the grazing activity was strong.Soil salt content of the degraded wetland was higher than that of the non-degraded wetland,so the content of the soil salt could reflect the degree of degradation of the degraded wetland to some extent,which can offer an effective basis for the prevention and control of the wetland degradation.

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