干旱区生态环境知识资源中心(Arid): 干旱区绿洲-荒漠带土壤水盐异质性及生态环境效应研究以黑河中游张掖绿洲为例

Arid

	干旱区绿洲-荒漠带土壤水盐异质性及生态环境效应研究以黑河中游张掖绿洲为例
其他题名	Heterogeneity of Soil Moisture and Salt Contents and Its Eco-environmental Effects in Oasis-desert Belt in Arid ZoneTaking Zhangye Oasis in the Middle Reaches of Heihe River as A Case Study
	张勃; 孟宝; 郝建秀; 丁文晖
ISSN	1000-694X
出版年	2006
卷号	26 期号:1 页码:81-84
中文摘要	对黑河中游地区典型绿洲的土壤含水量与含盐量分析表明，在无灌溉情况下，绿洲及绿洲边缘过渡带表层土壤含水量水平分异明显，由绿洲区的20％左右递减到绿洲-荒漠生态过渡带的2．9％。绿洲-荒漠带土壤水分变化反映了人类利用绿洲水资源的程度，在绿洲地下水资源开发过度和绿洲边缘人类活动剧烈的区域均存在着生态裂谷，对绿洲生态系统的稳定极为不利。绿洲-荒漠带土壤可溶性盐分含量的水平分异表现为绿洲土壤可溶性盐分含量比绿洲-荒漠生态过渡带和荒漠区低；绿洲界外区不同荒漠类型土壤含盐量变化不同，在绿洲外围沙质荒漠区，土壤含盐量较低，在绿洲外围砾质荒漠（戈壁）区，土壤含盐量明显高于绿洲区；荒漠区土壤含盐量的垂直变化表明，含盐量最高的聚集层一般不在表层，而在40～60cm的亚表层。受土壤水盐分异的影响，绿洲外围荒漠植被类型出现分异，从高位绿洲到中位绿洲，外围区荒漠植被的耐旱性和耐盐性均增加。
英文摘要	The soil moisture and salt contents analysis for representative oases in the middle reaches of Heihe River presented in this paper shows that the horizontal diversity of topsoil moisture content in oasis-desert belt is distinct under no irrigation condition, that is, the topsoil moisture content reduces from 20% of oasis to 2.9% of oasis-desert ecotone. The change of soil moisture content in oasis-desert belt reflects the utilization degree of water resources. Where is over extracting of groundwater and human intensive activities where exists ecological gap, which is disadvantageous to the stabilization of oasis ecosystem. The horizontal variance of soil dissoluble salt contents indicates that salt contents in oasis soil are lower than that in ecotone soil and desert soil. Besides, the soil salt contents are different in desert types outside oasis, that is, the soil salt content in sandy desert is lower than that in theGobi. The vertical profiles of desert soil salt content indicate that the higher salt content is not in the surface layer but in the subsurface layer of 40～60 cm. The soil moisture and salt content variances have resulted in the deserta diversity outside oasis, the drought-tolerance and salt-tolerance of deserta increase gradually from oasis in higher place to oasis in mid-position.
中文关键词	生态环境效应 ; 土壤水盐分异 ; 黑河中游 ; 张掖绿洲
英文关键词	oasis eco-environmental effects soil moisture and salt contents
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ASTRONOMY ASTROPHYSICS
WOS研究方向	Astronomy & Astrophysics
CSCD记录号	CSCD:2240892
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220426
作者单位	西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	张勃,孟宝,郝建秀,等. 干旱区绿洲-荒漠带土壤水盐异质性及生态环境效应研究以黑河中游张掖绿洲为例[J]. 西北师范大学,2006,26(1):81-84.
APA	张勃,孟宝,郝建秀,&丁文晖.(2006).干旱区绿洲-荒漠带土壤水盐异质性及生态环境效应研究以黑河中游张掖绿洲为例.,26(1),81-84.
MLA	张勃,et al."干旱区绿洲-荒漠带土壤水盐异质性及生态环境效应研究以黑河中游张掖绿洲为例".26.1(2006):81-84.