干旱区生态环境知识资源中心(Arid): 基于电磁感式大地电导率仪的南疆干旱区土壤电导率反演研究

Arid

	基于电磁感式大地电导率仪的南疆干旱区土壤电导率反演研究
其他题名	Inversion of Soil Electrical Conductivity Based on Electromagnetic Induction Data in the Arid Region of Southern Xinjiang
	吴家林; 冯春晖; 刘新路; 罗德芳; 齐威; 彭杰
来源期刊	土壤通报
ISSN	0564-3945
出版年	2019
卷号	50 期号:6
中文摘要	土壤盐渍化是南疆农业和生态环境可持续发展的主要障碍因素。本文以南疆阿拉尔地区不同程度盐渍化土壤区域为研究对象,分析不同程度盐渍化及不同土壤水分含量区域土壤电导率电磁感应反演模型的差异,旨在为电磁感应技术应用于区域尺度土壤盐渍化监测提供有效的参考和借鉴。通过EM38-MK2电磁感应仪采集3 个不同程度盐渍化土壤的电磁感应数据并同步采集土壤剖面样品,采用局部建模和全局建模的思路构建了土壤电导率的电磁感应反演模型。结果表明,土壤电导率电磁感应的线性模型、指数模型、对数模型和乘幂4种模型中,线性模型的精度最高。基于表观电导率数据所构建的土壤电导率局部模型精度优于全局模型,0 ~ 20、20 ~ 40、40 ~ 60 cm等不同深度土层局部模型的R2在0.78 ~ 0.89之间,全局模型则在0.70 ~ 0.80之间。土壤含水率对电导率电磁感应反演模型精度有明显影响,当土壤含水量小于10%时,土壤电导率电磁感应模型的R2为0.73,10% ~ 20%时为0.85,大于20%为0.86。研究结果为同类地区土壤盐渍化的电磁感应监测提供了良好的借鉴。
英文摘要	Soil salinization is the main obstacle to the sustainable development of agricultural and ecological environment in southern Xinjiang. The difference in the electromagnetic induction inversion model of soil conductivity was analyzed among the Alar areasofsouthern Xinjiang with different degrees of salinization and soil moisture contents to provide an effective reference for the application of electromagnetic induction technology in soil salinization monitoring at the regional scale. EM38-MK2 electromagnetic sensor was used to collect electromagnetic induction data ofsoil profile samples. The electromagnetic induction inversion model of soil conductivity was constructed based on the ideas of local modeling and global modeling. The results showed that the linear model of soil electrical conductivity electromagnetic induction showed the highest accuracy. The local model of soil conductivity based on the apparent conductivity data was more accurate than the global model. The R2 of the local model and that of the global model atdifferent depths of 0 - 20, 20 - 40, 40 - 60 cm was between 0.78 - 0.89 and between 0.70 - 0.80, respectively. Soil moisture content varied with the precision of the electromagnetic induction model of soil conductivity. The R2 of the electromagnetic induction model of soil conductivity was 0.73, 0.85 and 0.86 under the soil moisture content less than 10%, 10% - 20%, and greater than 20%, respectively. The results would provide a good reference for electromagnetic induction monitoring of soil salinization in similar areas.
中文关键词	电磁感应技术 ; 土壤盐渍化 ; 模型构建 ; 反演研究
英文关键词	Electromagnetic induction technology Soil salinization Buildingmodel Inversion study
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6672159
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353282
作者单位	吴家林, 塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国. 冯春晖, 塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国. 刘新路, 塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国. 罗德芳, 塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国. 齐威, 塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国. 彭杰, 塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国.
推荐引用方式 GB/T 7714	吴家林,冯春晖,刘新路,等. 基于电磁感式大地电导率仪的南疆干旱区土壤电导率反演研究[J],2019,50(6).
APA	吴家林,冯春晖,刘新路,罗德芳,齐威,&彭杰.(2019).基于电磁感式大地电导率仪的南疆干旱区土壤电导率反演研究.土壤通报,50(6).
MLA	吴家林,et al."基于电磁感式大地电导率仪的南疆干旱区土壤电导率反演研究".土壤通报 50.6(2019).