摘要
利用传统统计学和地统计学方法研究不同尺度不同土层土壤电导率的空间变异性及其与土壤基本物理特性的相关性.结果表明：随尺度增大,不同土层土壤电导率的变异程度由弱变异变为中等变异,空间相关范围增加,0～20cm土层空间相关性由中等变为强烈,20～40cm土层空间相关性均为中等.随土层深度增加,不同尺度20～40cm土层土壤电导率的空间相关范围均大于0～20cm土层,田间尺度上不同土层空间相关性均为中等,区域尺度上空间相关性由强烈变为中等.区域尺度上0～20cm土层土壤电导率分布比较离散,20～40cm土层自西向东先降后增.不同尺度上0～20cm土层土壤电导率与土壤基本物理特性的相关性不显著,20～40cm土层土壤电导率在田间尺度上与粗粉粒和砂粒含量的相关性显著,在区域尺度上与粗粉粒和粘粒含量的相关性显著.
The paper studied spatial variability of soil electrical conductivities in different soil layers at field and region scales with traditional statistics and geostatistics methods and relationships between them and soil physical properties. As the scale increases,variation degrees of soil electrical conductivity in different soil layers change from weak to moderate,its spatial correlation ranges in different soil layers increase,its spatial correlation degrees in 0 ～ 20 cm soil layer change from moderate to strong,and the ones in 20 ～ 40 cm soil layer keep the medium unchanged. As soil depth increases,spatial correlation ranges of soil electrical conductivity in20 ～ 40 cm soil layer are more than the corresponding ones in 0 ～ 20 cm soil layer at field and region scales,its spatial correlation degrees in different soil layers at field scale are moderate,and its spatial correlation degrees at region scale change from strong to moderate. At region scale,spatial distribution of soil electrical conductivity in 0 ～ 20 cm soil layer is discrete,the one in 20 ～ 40 cm soil layer first decreases and then increases from west to east. Relationships between soil electrical conductivity and soil physical properties in 0 ～ 20 cm soil layer are not significant at different scales,for 20 ～ 40 cm soil layer,relationships between it and silt and sand contents at field scale are significant,and there are significant relationships between it and silt and clay contents at region scale.
作者
刘继龙
刘璐
马孝义
付强
王海江
张振华
张玲玲
虞鹏
LIU Jilong;LIU Lu;MA Xiaoyi;FU Qiang;WANG Haijiang;ZHANG Zhenhua;ZHANG Lingling;YU Peng(School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China;College of Water Resources and Architectural Engineering, Northwest A＆F University, Yangling 712100, China;School of Information ＆ Electrical Engineering, Hebei University of Engineering, Handan 056038, China;College of Resources and Environmental Engineering, Ludong University, Yantai 264025, China;College of Science, Northeast Agricultural University, Harbin 150030 ,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2018年第2期305-312,共8页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51409046)
东北农业大学学术骨干项目(16XG12)
东北农业大学青年才俊项目(17QC25)
黑龙江省博士后科研启动金项目(LBH-Q16023)
河北省自然科学基金项目(D2015402159)
黑龙江省博士后资助经费项目(LBH-Z17009)
关键词
土壤盐分
空间变异
尺度
土层
soil salt
spatial variability
scale
soil layer
作者简介
刘继龙（1981-），男，博士，副教授．E—mail：liujilong1981@163．com;通信作者：马孝义（1965-），男，博士，教授．E—mail：xiaoyima@vip．sina．com
