干旱区生态环境知识资源中心(Arid): 基于GWR模型的于田绿洲土壤表层盐分空间分异及其影响因子

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	基于GWR模型的于田绿洲土壤表层盐分空间分异及其影响因子
其他题名	Spatial differentiation and impact factors of Yutian Oasis’s soil surface salt based on GWR model
	袁玉芸; 瓦哈甫·哈力克; 关靖云; 卢龙辉; 张琴琴
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2016
卷号	27 期号:10 页码:3273-3282
中文摘要	以于田绿洲为研究靶区,利用24个采样点的土壤表层盐分数据,选取9个与土壤表层盐分密切相关的影响因子,结合空间自相关、传统回归分析和地理加权回归模型,分析表土盐分的空间分布特征及其影响因子的空间分异.结果表明:于田绿洲表土盐分在空间上并非随机分布,而是存在较强的空间依赖关系,空间自相关指数为0.479.地下水矿化度、地下水埋深、高程和温度是影响干旱区平原绿洲表土积盐的主要因子,这些因子具有空间异质性,选取的9个环境变量中除土壤pH值外,其他变量对表土盐分的影响强度均存在显著的空间分异. GWR模型对存在空间非平稳性数据的解释能力和估计精度都优于OLS模型,而且在模型估计参数的可视化上具有明显优势.
英文摘要	In this paper,topsoil salinity data gathered from 24 sampling sites in the Yutian Oasis were used,nine different kinds of environmental variables closely related to soil salinity were selected as influencing factors,then,the spatial distribution characteristics of topsoil salinity and spatial heterogeneity of influencing factors were analyzed by combining the spatial autocorrelation with traditional regression analysis and geographically weighted regression model. Results showed that the topsoil salinity in Yutian Oasis was not of random distribution but had strong spatial dependence, and the spatial autocorrelation index for topsoil salinity was 0.479. Groundwater salinity,groundwater depth,elevation and temperature were the main factors influencing topsoil salt accumulation in arid land oases and they were spatially heterogeneous. The nine selected environmental variables except soil pH had significant influences on topsoil salinity with spatial disparity. GWR model was superior to the OLS model on interpretation and estimation of spatial non-stationary data,also had a remarkable advantage in visualization of modeling parameters.
中文关键词	土壤表层盐分 ; 地理加权回归 ; 空间分异
英文关键词	topsoil salinity GWR model spatial heterogeneity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5823186
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235255
作者单位	新疆大学, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	袁玉芸,瓦哈甫·哈力克,关靖云,等. 基于GWR模型的于田绿洲土壤表层盐分空间分异及其影响因子[J]. 新疆大学,2016,27(10):3273-3282.
APA	袁玉芸,瓦哈甫·哈力克,关靖云,卢龙辉,&张琴琴.(2016).基于GWR模型的于田绿洲土壤表层盐分空间分异及其影响因子.应用生态学报,27(10),3273-3282.
MLA	袁玉芸,et al."基于GWR模型的于田绿洲土壤表层盐分空间分异及其影响因子".应用生态学报 27.10(2016):3273-3282.