干旱区生态环境知识资源中心(Arid): 科尔沁沙丘-草甸相间地区表土饱和导水率的土壤传递函数研究

Arid

	科尔沁沙丘-草甸相间地区表土饱和导水率的土壤传递函数研究
其他题名	PREDICTION OF SATURATED HYDRAULIC CONDUCTIVITY OF SURFACE SOIL IN SAND-DUNE-AND-MEADOW INTERLACED REGION OF HORQIN WITH PEDO-TRANSFER FUNCTIONS METHOD
	孙丽; 刘廷玺; 段利民; 贾恪
来源期刊	土壤学报
ISSN	0564-3929
出版年	2015
卷号	52 期号:1 页码:68-76
中文摘要	以科尔沁沙地典型坨-甸相间地区为研究区,野外布设240个采样点,对流动沙丘、半固定沙丘、固定沙丘、沙丘区杨树林、沙丘区耕地、低覆盖度草甸、高覆盖度草甸、草甸区耕地、撂荒地9种地貌类型下的表层土壤进行了采样,测定了其含水率、干容重、有机质、饱和导水率等理化特性,分析了不同地貌类型下表层土壤理化参数差异。选取Campbell、Cosby、Wosten等、Saxton等4种土壤饱和导水率传递函数,对该地区表土饱和导水率进行了预测。结果显示这几种土壤传递函数预测值与实测值偏差较大,相关系数均小于0.3,精度难以满足本地区应用。在此基础上,选取土壤容重、有机质含量、饱和含水率、平均粒径、粒径标准偏差5种土壤特性参数作为输入变量,采用主成分分析与非线性回归分析相结合的方法,重新建立了预测本地区表土饱和导水率的土壤传递函数,结果显示预测值与实测值相关系数为0.661,该传递函数可用于科尔沁沙地表层土壤饱和导水率的预测。
英文摘要	In a sand-dune-and-meadow interlaced region typical of Horqin, a total of 240 sampling sites were laid out, covering 9 different types of landforms, i.e., mobile sand dunes, semi-fixed sand dunes, fixed sand dunes, poplar woods in sand dune area, cultivated land in sand dune area, low coverage meadow, high coverage meadow, cultivated land in meadow area, and deserted land, for collection topsoil samples. Physicochemical properties, including the moisture content, dry bulk density, organic matter, and saturated hydraulic conductivity, of the soil samples were determined for analysis of variation of the properties with geomorphic type. These four kinds of pedo-transfer functions, that is Campbell, Cosby, Wosten et al, and Saxton et al, were chosen for use to predict saturated hydraulic conductivity of the surface soils in this region. Results show that the predicted values and the measured values differed quite sharply, with correlation coefficient being less than 0.3, so the precision of the prediction was far from satisfactory for use in this region. On such a basis, soil bulk density, organic matter content, saturated moisture content, average particle size, and particle size standard deviation were used as input variables in combination with principal component analysis and nonlinear regression analysis methods. In this way, new pedo-transfer functions were establishd for prediction of saturated hydraulic conductivity of the surface soil in this region. Results show that the correlation coefficient between predicted and measured values was increased up to 0.661, demonstrating that the new pedo-transfer functions can be applied to prediction of saturated hydraulic conductivity of the surface soil of Horqin sandy land.
中文关键词	科尔沁沙地 ; 土壤传递函数 ; 表层土壤 ; 饱和导水率 ; 非线性回归
英文关键词	Horqin sandy land Pedo-transfer function Surface soil Saturated hydraulic conductivity Nonlinear regression
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5330701
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233436
作者单位	内蒙古农业大学水利与土木建筑工程学院, 呼和浩特, 内蒙古 010018, 中国
推荐引用方式 GB/T 7714	孙丽,刘廷玺,段利民,等. 科尔沁沙丘-草甸相间地区表土饱和导水率的土壤传递函数研究[J]. 内蒙古农业大学,2015,52(1):68-76.
APA	孙丽,刘廷玺,段利民,&贾恪.(2015).科尔沁沙丘-草甸相间地区表土饱和导水率的土壤传递函数研究.土壤学报,52(1),68-76.
MLA	孙丽,et al."科尔沁沙丘-草甸相间地区表土饱和导水率的土壤传递函数研究".土壤学报 52.1(2015):68-76.