干旱区生态环境知识资源中心(Arid): 西南岩溶区土壤全氮含量的空间变异分析

Arid

	西南岩溶区土壤全氮含量的空间变异分析
其他题名	Spatial Variability of Total Soil Nitrogen Content in Karst Area of Southwest China
	李文军 1; 杨奇勇 2; 彭保发 1; 赵迪 1
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2014
卷号	45 期号:9 页码:150-154
中文摘要	选择典型的岩溶峰丛洼地区域,在利用多元逐步回归分析研究0~20cm深度土壤全氮含量与地形指数因子关系的基础上,利用普通克里格法(OK)、单变量协同克里格法(COK)和多变量协同克里格法(MCOK)对土壤全氮含量的空间变异性进行了分析。结果表明:研究区域土壤全氮含量空间分布可以用两个回归模型来表征。克里格插值分析表明,当全氮含量与地形指数因子相关系数较低时,COK法并不能有效提高全氮预测精度;随着协同变量的增加,MCOK法能够显著提高全氮预测精度。
英文摘要	A typical peak-cluster depression area was selected as the study area. Based on the relationships between total soil nitrogen content in 0~20cm depth and terrain attributes by multiple linear stepwise regression method, the spatial variability of total nitrogen was studied by ordinary Kriging (OK), univariate Cokriging (COK) and multivariable Cokriging (MCOK) methods. Results showed that the spatial distribution of total nitrogen can be described by two regression models. Distance from ridge of mountains (V_(DFR)) entered into the regression equation for the model (1), and distance from ridge of mountains (V_(DFR)) and relief degree of land surface (V_(RS)) entered into the regression equation for the model (2). Therefore, V_(DFR) was selected as auxiliary variable to predict total nitrogen by COK method, and V_(DFR) and V_(RS) were selected as auxiliary variables to predict total nitrogen by MCOK method. The Kriging interpolation indicated that when the correlation coefficient between total nitrogen and terrain attributes was small, the accuracy of COK was increased litter. While MCOK can promote the accuracy notable. This study can provide a new idea and method for evaluation and ecological reconstruction of the karst rock desertification.
中文关键词	西南岩溶地区 ; 土壤全氮含量 ; 半方差函数 ; 协同克里格
英文关键词	Karst area of southwest China Total soil nitrogen content Semi-variances Cokriging
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:5237473
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231512
作者单位	1.湖南文理学院资源环境与旅游学院, 常德, 湖南 415000, 中国; 2.中国地质科学院岩溶地质研究所, 桂林, 广西 541004, 中国
推荐引用方式 GB/T 7714	李文军,杨奇勇,彭保发,等. 西南岩溶区土壤全氮含量的空间变异分析[J],2014,45(9):150-154.
APA	李文军,杨奇勇,彭保发,&赵迪.(2014).西南岩溶区土壤全氮含量的空间变异分析.农业机械学报,45(9),150-154.
MLA	李文军,et al."西南岩溶区土壤全氮含量的空间变异分析".农业机械学报 45.9(2014):150-154.