干旱区生态环境知识资源中心(Arid): 砒砂岩-黄土沟谷土壤含水量的时空变化

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	砒砂岩-黄土沟谷土壤含水量的时空变化
其他题名	Spatiotemporal Variation of Soil Moisture Content in the Soft-rock Loess Gully
	赵利清; 杨劼; 张璞进; 宋炳煜
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2009
卷号	29 期号:1 页码:56-61
中文摘要	以晋、陕、蒙交界地区常见的砒砂岩-黄土丘陵沟谷为研究对象,分别于2005年7月和10月对沟谷不同部位土壤含水量进行了测定.结果表明,其时空变化特征明显.(1)沟谷不同部位土壤平均含水量大小为7月份:沟谷底部14.44%,阳坡顶部9.29%,阴坡顶部9.01%,阴坡中部8.25%,阳坡中部6.36%;10月份:沟谷底部9.96%,阴坡顶部9.81%,阳坡中部9.48%,阴坡中部9.09%,阳坡顶部8.06%.(2)砒砂岩平均含水量季节变幅小,属稳定型;黄土及有冲积层的黄土平均含水量季节变化较大,属波动型.(3)在砒砂岩剖面上,泥岩含水量显著大于砂岩,砒砂岩坡面平缓的地段贮水能力比陡的地段大.(4)在黄土剖面上,明显出现土壤干层现象,在夏季、秋季降雨较少的情况下,土壤水分会严重降低,土壤水分处于负补偿状态,土壤干层距地表更深.在半干旱地区的砒砂岩-黄土丘陵沟壑区,黄土剖面土壤干层的发生是一个自然现象,随降雨量的多寡,呈消长状态.
英文摘要	A special loess gully type, soft-rock loess gully, is distributed in the border area of Shanxi, Shaanxi, and Inner Mongolia, in which water loss and soil erosion are serious. In the study, soil moisture characteristics in the soft-rock loess gully were measured and analyzed. The main results are as follows: (1) In midsummer (July), the averaged soil moisture content of the various parts of the gully was obviously different. The order of landform units from high to low, in terms of soil moisture content, was the bottom of gully(14.44%), the top of sunny slope(9.29%), the top of shady slope(9.01%), the middle of shady slope (8.25%), and the middle of sunny slope(6.36%). While in late autumn(October), the order was the bottom of gully(9.96%), the top of shady slope(9.81%), the middle of sunny slope(9.48%), the middle of shady slope(9.09%), and the top of sunny slope(8.06%). (2) The averaged soil moisture content of soft-rock appeared no obvious seasonal change, but an obvious seasonal change in the averaged soil moisture con-tent was found in loess materials. (3) Water content of mudstone was significantly higher than sandstone along the profile of soft-rock. Moreover, water storage capacity of soft-rock on gentle slope was greater than steep slope. (4) An obvious phenomenon of dried soil layer appeared in the loess profiles. Under low precipitation in summer and autumn, soil moisture seriously was decreased, which was a negative compensation. So, the thickness of dried soil layers was increased. Therefore, dried soil layer is a natural phenomenon in the soft-rock loess gully area of semiarid region and its growth and declination follow the changes of rainfall.
中文关键词	砒砂岩-黄土丘陵沟壑区 ; 土壤剖面 ; 水分 ; 半干旱区
英文关键词	soft-rock loess gully soil profile water content semiarid region
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:3562274
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378646
作者单位	赵利清, 内蒙古大学,生命科学学院, 呼和浩特, 内蒙古 010021, 中国.; 杨劼, 内蒙古大学,生命科学学院, 呼和浩特, 内蒙古 010021, 中国.; 张璞进, 内蒙古大学,生命科学学院, 呼和浩特, 内蒙古 010021, 中国.; 宋炳煜, 内蒙古大学,生命科学学院, 呼和浩特, 内蒙古 010021, 中国.
推荐引用方式 GB/T 7714	赵利清,杨劼,张璞进,等. 砒砂岩-黄土沟谷土壤含水量的时空变化[J],2009,29(1):56-61.
APA	赵利清,杨劼,张璞进,&宋炳煜.(2009).砒砂岩-黄土沟谷土壤含水量的时空变化.水土保持通报,29(1),56-61.
MLA	赵利清,et al."砒砂岩-黄土沟谷土壤含水量的时空变化".水土保持通报 29.1(2009):56-61.