干旱区生态环境知识资源中心(Arid): 黄土高原土壤干燥化问题探源

Arid

	黄土高原土壤干燥化问题探源
其他题名	ESSENTIAL EXPLORATION OF SOIL ARIDIZATION IN LOESS PLATEAU
	杨文治 1; 田均良 2
来源期刊	土壤学报
ISSN	0564-3929
出版年	2004
卷号	41 期号:1 页码:1-6
中文摘要	以黄土沉积环境的旱化和黄土形成的三种风化类型为切入点,通过古今类比分析,探究了黄土高原土壤干燥化的黄土地质渊源.其次,讨论了土壤干燥化的土壤物理学成因.土壤水分物理特性,因受黄土粒度组成的制约而呈现出明显的方向性变化,即从西北向东南,土壤持水性能渐次增高,土壤蒸发性能渐趋降低,以田间持水量作为参照状态,则会发现黄土高原土壤经常处于水分亏缺状态.土壤干层的形成是干扰和破坏植物演替序列及其土壤水分生态基础造成的后果,从而引起土壤干燥化的趋强化发展,最后,从气侯变化入手,对黄土高原土壤干燥化趋势进行了预估.
英文摘要	Soil aridizalion has turned into an important restricted factor on ecological construction in Loess Plateau. It is believed that loess in China is an indicator of the arid and semiarid climate. The development of loess deposition is a symbol ex-isting the general tendency of climate aridization in North China from the Early to the Late Pleistocene. Loess as the parent mate-rial of modern loess soil has a significant influence on soil development and its properties can be reflected in modern loess soils. Taking environment aridization with loess deposition and three weathering type of loess formation as a starting point, loess geolog-ic origin of soil aridization in Loess Plateau was explored through comparative analysis between the old and present time. Soil physical cause of soil aridization is discussed in the paper. Soil aridization in Loess Plateau is the result of common influence of transient and immanent condition. Soil water physical properties, including water retention property and evaporation property, show an obvious regional directional change dealing with loess grain size composition, It means that soil water retention property gradually increases and soil evaporation property gradually drops from northwest to southeast, If the field capacity is taken as an index, and then soil water deficiency is discovered frequently in Loess Plateau. Arid soil-layer is the ecological aftermath of strengthened soil aridization resulted from the disturbing and breaking alignment of plant succession and ecological foundation of soil water. Based on analysis of climate change, prediction of soil aridization tendency in Loess Plateau is presented in the pa-per.
中文关键词	土壤干燥化 ; 土壤水分生态分区 ; 黄土高原 ; 植物演替 ; 气侯变化
英文关键词	Loess Plateau oil aridization Ecological zonation of soil water Plant succession Climate change
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:1498956
来源机构	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/2XILL650/205546
作者单位	1.中国科学院水利部水土保持研究所, 杨凌, 陕西 712100, 中国; 2.中国科学院水利部水土保持研究所, 杨陵, 陕西 712100, 中国
推荐引用方式 GB/T 7714	杨文治,田均良. 黄土高原土壤干燥化问题探源[J]. 中国科学院水利部水土保持研究所,2004,41(1):1-6.
APA	杨文治,&田均良.(2004).黄土高原土壤干燥化问题探源.土壤学报,41(1),1-6.
MLA	杨文治,et al."黄土高原土壤干燥化问题探源".土壤学报 41.1(2004):1-6.