干旱区生态环境知识资源中心(Arid): 绿洲-荒漠过渡带不同植被覆盖度下土壤水分的变化规律研究

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	绿洲-荒漠过渡带不同植被覆盖度下土壤水分的变化规律研究
其他题名	Variation of soil water with different vegetation coverages in oasis -desert ecotone
	张建兵 1; 熊黑钢2 ; 李宝富 1; 龙桃 1
ISSN	1003-7578
出版年	2009
卷号	23 期号:12 页码:161-166
中文摘要	利用TDR对新疆奇台满营湖绿洲-荒漠过渡带3种覆盖度(30%,15%,0)下的土壤水分进行定点监测,研究其动态变化规律.研究表明:植被覆盖度高的样地表层(0～20cm)土壤含水量高,变异系数和变化速率小,而覆盖度低的样地表层与之相反,覆盖度30%、15%、0的样地的表层含水量均值分别是14.99%,13.23%,11.21%,变异系数分别是0.16,0.20,0.33,变化速率分别是0.95,1.03,1.55.同时,3种覆盖度下整个剖面的土壤含水量均值的变异系数分别是0.12,0.19,0.22,变化速率分别是0.83,1.04,1.25,说明地表植被覆盖对土壤起着涵水和调熵的作用;土壤水分垂直变化规律的总体特征是剖面各层土壤含水量从表层向底层逐渐增大,而变异系数从表层向下逐渐减小;土壤水分垂直变化类型的总体分布趋势是从上至下为速变层、活跃层和次活跃层(异常层除外);土壤水分的时间变化明显,3样地4月初剖面水分均值分别为19.46%,16.64%,17.04%,8月16日分别为14.50%,10.41%,9.54%;异常层粗颗粒含量高于其他层,并且含水量、贮水量低,变异系数大,属于速变层,说明异常层涵水能力差,对土壤的调熵作用弱.
英文摘要	The laws of soil water variation are different from each other of different vegetation coverage. Based TDR, we tried to study the dynamic changes of soil water in Man - yinghu ecotone, Qi tai country of Xin jiang.The research showed that: ( 1 ) With higher vegetation coverage, the soil water content of surface layer (0 ～20cm) is high, the variation coefficient and change rate are low, and that of low vegetation coverage is opposite.The average soil water contents with vegetation coverage of 30%, 15%, 0 are 14.99%, 13.23%, 11.21%,the variation coefficient are 0.16, 0. 20, 0. 33, and the change rate are 0. 95, 1.03, 1.55 respectively. At the same time, the variation coefficients of the whole soil profile are 0. 12, 0. 19, 0.22, and the change rate are 0.83, 1.04, 1.25 respectively in three spots. All of the phenomenon indicated that vegetation coverage can help the soil to stockpile water and reduce the change rate. (2)The change low of soil water of the profile is that:from the surface to the bottom, the average soil water content increases and the variation coefficient reduces. (3)The vertical layers of soil water content are divided into three layers: rapid change layer, active layer and sub -active layer from the surface to the bottom (not including the abnormal layer). (4) It is obvious that soil rater content changes along with the change of time, the average soil water content of the three types of vegetation coverage change from 19.46%, 16.64%, 17.04% to 14.50% ,10.41% ,9.54%. (5) The thick grain content of abnormal layer is more than the normal layer, the soil water content, pondage are low, the variation coefficient is high, it is the rapid change layer, all of these indicate that the ability of stockpile water of high thick grain content layer is weak, and it can not regulate the change of soil water.
中文关键词	绿洲-荒漠过渡带 ; 植被覆盖度 ; 土壤水分 ; 变化规律
英文关键词	oasis - desert ecotone vegetation coverage soil water changes law
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:3881168
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223730
作者单位	1.新疆大学资源与环境科学学院, 乌鲁木齐, 新疆 830046, 中国; 2.北京联合大学应用文理学院城市系, 北京 100083, 中国
推荐引用方式 GB/T 7714	张建兵,熊黑钢,李宝富,等. 绿洲-荒漠过渡带不同植被覆盖度下土壤水分的变化规律研究[J]. 新疆大学,2009,23(12):161-166.
APA	张建兵,熊黑钢,李宝富,&龙桃.(2009).绿洲-荒漠过渡带不同植被覆盖度下土壤水分的变化规律研究.,23(12),161-166.
MLA	张建兵,et al."绿洲-荒漠过渡带不同植被覆盖度下土壤水分的变化规律研究".23.12(2009):161-166.