干旱区生态环境知识资源中心(Arid): 科尔沁不同沙地土壤饱和导水率比较研究

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	科尔沁不同沙地土壤饱和导水率比较研究
其他题名	A COMPARISON OF SOIL SATURATED HYDRAULIC CONDUCTIVITY (KFS) IN DIFFERENT HORQIN SAND LAND
	姚淑霞; 赵传成; 张铜会
来源期刊	土壤学报
ISSN	0564-3929
出版年	2013
卷号	50 期号:3 页码:469-477
中文摘要	用Guelph入渗仪对科尔沁沙地不同沙漠化阶段土壤不同层次的土壤饱和导水率(Kfs)进行测定,分析研究了Kfs与沙地类型、土层厚度、沙丘坡位及土壤理化性质的关系。结果表明:(1)草地(潜在沙漠化)、固定沙丘(轻度沙漠化)和流动沙丘(严重沙漠化)的Kfs依次增大,平均值分别为2.15、4.79和5.89 mm min~(-1),呈现出土壤人渗能力随沙漠化程度的增强而增强的趋势;三种沙地间Kfs差异显著,沙丘不同坡位Kfs也有较大差异,表明科尔沁沙地Kfs具有较高的空间异质性;(2)三种沙地Kfs随深度的变化规律差异较大,草地Kfs随深度呈抛物线状变化,而固定沙丘Kfs随深度呈指数函数变化;(3)通过逐步回归分析发现对Kfs影响较大的土壤理化性质是土壤有机质含量、土壤细砂含量、黏粉粒含量和粗砂粒含量,并且Kfs与前三个因素呈显著的负相关关系,与最后一个因素呈显著的正相关关系。
英文摘要	In situ measurements with a Guelph Permeator were performed to investigate the saturated hydraulic conductivity of soils (Kfs) at various desertified sand lands, such as grassland, fixed sand dune and mobile sand dune of Horqin Sand Land. Based on analyzing the relationships of Kfs with the sand land types, soil depths, slope position of sand dunes and soilphysical and chemical properties, the results indicated that : (1) The average Kfs increased in the order : grassland (potential desertification), fixed sand dune (light desertification) and mobile sand dune (serve desertification), and the value was 2.15, 4.79 and 5.89 mm min~(-1), respectively. That was, the more serious desertified, the higher infiltration capacity. A statistically significant differences (p <0.05) in Kfs were found among the three sites and between the slope positions of the two dunes. So, the Kfs at Horqin Sand Land has showed a higher heterogeneity; (2) The changes of Kfs was considerably with the increase of soil profile depths. The changes of Kfs with soil depths at grassland could be fitted with parabola models, and for fixed sand dune by exponential models; (3) The stepwise regression revealed that the soil organic matter content, the fine sand fraction (0.1~0.05 mm) and the clay and silt content (<0.05 mm) were some key factors affecting Kfs with a significantly negative relationship, but there was a significantly positive correlation with the coarse sand fraction (2~0.1 mm).
中文关键词	饱和导水率 ; 沙漠化 ; 科尔沁沙地
英文关键词	Saturated hydraulic conductivity Desertification Horqin Sand Land
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:4842013
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230255
作者单位	中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	姚淑霞,赵传成,张铜会. 科尔沁不同沙地土壤饱和导水率比较研究[J]. 中国科学院西北生态环境资源研究院,2013,50(3):469-477.
APA	姚淑霞,赵传成,&张铜会.(2013).科尔沁不同沙地土壤饱和导水率比较研究.土壤学报,50(3),469-477.
MLA	姚淑霞,et al."科尔沁不同沙地土壤饱和导水率比较研究".土壤学报 50.3(2013):469-477.