干旱区生态环境知识资源中心(Arid): 黄土高原不同土地利用类型土壤含水量的地带性与影响因素

Arid

	黄土高原不同土地利用类型土壤含水量的地带性与影响因素
其他题名	Zonal pattern of soil moisture and its influencing factors under different land use types on the Loess Plateau
	索立柱; 黄明斌; 段良霞; 张永坤
来源期刊	生态学报
ISSN	1000-0933
出版年	2017
卷号	37 期号:6 页码:2045-2053
中文摘要	通过对黄土高原南北样带大面积(北纬34°05’40°75’、东经107°14’111°09’)土壤含水量(0500 cm剖面)测定和相应植被类型调查,研究了黄土高原农田、草地、灌木林地和乔木林地4种土地利用类型土壤含水量的空间变化及它们之间的差异性。结果表明:黄土高原4种土地利用类型的土壤含水量皆呈现南北向地带性变化,自南向北土壤含水量有明显递减趋势,与多年平均降雨量、潜在蒸散量、土壤质地等的分布具有一致性;同一地点不同土地利用类型下土壤水分含量具有显著差异(农地>草地>灌木和乔木林地),不同植被类型根系分布、蒸散耗水量的不同是造成含水量差异性的原因。植被建设应遵循土壤水分分布规律,研究结果对黄土高原植被恢复建设具有一定参考价值。
英文摘要	Soil moisture is a key factor for plant growth and eco-environment restoration on the Loess Plateau,China. The Loess Plateau is has an arid and semi-arid climate,complicated landforms,and a unique loess-deposition soil environment. The understanding of zonal pattern in soil moisture under different land use types is fundamental for environmental mnagement for the selection and plantation of non-native vegetation types. In the present study,a transect with an area of 194000 km~2 was selected at the center of the Loess Plateau with a north-south direction to investigate the effects of the changes in rainfall,potential evaporation,soil texture,and vegetation types on soil moisture. This transect included all vegetation,soil,and climatic types of the Loess Plateau. Soil moisture profiles of 0500 cm under farmland,grassland, shrub land and woodland were measured using the sampling method in 29 counties from the southern to northern Loess Plateau from July to August 2014. Soil texture,vegetation,slope,slope direction,elevation,latitudes,and longitudes were also measured. The results showed that: 1) soil moisture under four land use types decreased gradually from the southern to the northern Loess Plateau with increasing latitude. This corresponded to the distribution of the mean annual precipitation, potential evapotranspiration,and soil clay texture across the Loess Plateau; 2) soil moisture was significantly different under different land use types through the comparison of soil moisture in horizontal and vertical directions. The general trend for the soil moisture was: farmland > grassland > shrub land > woodland. The differences in root distribution and evapotranspiration under different land use types resulted in the above trend; 3 ) six factors,including mean annual precipitation,latitude,clay content,sand content,silt content,and potential evaporation,were identified as the main factors affecting the soil moisture content determined by correlation analysis. The mean annual precipitation and clay content were identified as the most important factors influencing soil moisture using stepwise regression analysis. Compared with the clay content,the mean annual precipitation was the main factor determining the spatial variation in soil moisture under different land use types. This information is useful for environmental managers to ensure ecological restoration on the Loess Plateau.
中文关键词	黄土高原 ; 土壤水分 ; 植被类型 ; 空间变化
英文关键词	the Loess Plateau soil moisture land use type spatial variation
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:5959157
来源机构	西北农林科技大学 ; 中国科学院水利部水土保持研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236456
作者单位	西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌, 712100
推荐引用方式 GB/T 7714	索立柱,黄明斌,段良霞,等. 黄土高原不同土地利用类型土壤含水量的地带性与影响因素[J]. 西北农林科技大学, 中国科学院水利部水土保持研究所,2017,37(6):2045-2053.
APA	索立柱,黄明斌,段良霞,&张永坤.(2017).黄土高原不同土地利用类型土壤含水量的地带性与影响因素.生态学报,37(6),2045-2053.
MLA	索立柱,et al."黄土高原不同土地利用类型土壤含水量的地带性与影响因素".生态学报 37.6(2017):2045-2053.