干旱区生态环境知识资源中心(Arid): 岩溶坡地土壤侵蚀强度的~(137) Cs法研究

Arid

	岩溶坡地土壤侵蚀强度的~(137) Cs法研究
其他题名	Study on Soil Erosion of Different Degrees in Karst Region by Using Cesium-~(137) Technique
	张治伟; 傅瓦利; 张洪; 夏凯生; 朱章雄
ISSN	1008-2786
出版年	2007
卷号	25 期号:3 页码:302-308
中文摘要	在重庆南部南川市境内,按不同侵蚀强度取~(137)Cs样品,用于研究岩溶坡地不同侵蚀程度的土壤侵蚀强度与特征.结果表明,林草地侵蚀速率变化范围49.3 t/(km~2·a)～230.5 t/(km~2·a),平均侵蚀速率112.5 t/(km~2·a);缓坡耕地侵蚀速率变化范围190.3～1 138.4 t/(km~2·a),平均565.5 t/(km~2·a);陡坡耕地的侵蚀速率变化范围为452.0～3 759.4 t/(km~2·a),平均2 264.8 t/(km~2·a).与黄土高原和紫色土区相比,岩溶区侵蚀速率较小.
英文摘要	Chose soil samples according to different degrees of soil erosion in karst slope to study the soil erosion rates,soil erosion intensity and its characteristics by using cesium-137 technique in Nanchuan county,Chongqing.It is showed that the erosion rates of woodland and grassland range from 49.3 t/(km~2·a) to 230.5 t/(km~2·a),its mean value is 112.56 t/(km~2·a);the erosion rates of cultivated profiles associated with relatively small slopes range from 190.3 to 1 138.4 t/(km~2·a),its mean value is 565.5 t/(km~2·a).Nevertheless,the erosion rates of cultivated land with large slopes change from 452.0 t/(km~2·a) to 3 759.4 t/(km~2·a),its mean value is 2 264.8 t/(km~2·a).Our research shows that the average thickness eroded in cultivated profiles in one year is 1.8 to 42 times as the woodland and grassland.Positive correlation exists between soil erosion rates and gradients.In addition,soil erosion rates on upside and middle sector are bigger than that of lower section in karst slopes,farming at steep slope must be responsible mostly for the the increase of soil erosion rates and the development of the rock desertification.Contrast to purple land and loess plateau,the soil erosion rates in karst region is small,but it’s very dangerous because of the slow speed of weathering and pedogenesis of carbonate rock.
中文关键词	岩溶区 ; 不同侵蚀强度 ; ~(137)Cs法研究
英文关键词	karst region different soil erosion degree Cesium-~(137) technique
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:3103870
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221289
作者单位	西南大学地理科学学院, 重庆 400715, 中国
推荐引用方式 GB/T 7714	张治伟,傅瓦利,张洪,等. 岩溶坡地土壤侵蚀强度的~(137) Cs法研究[J],2007,25(3):302-308.
APA	张治伟,傅瓦利,张洪,夏凯生,&朱章雄.(2007).岩溶坡地土壤侵蚀强度的~(137) Cs法研究.,25(3),302-308.
MLA	张治伟,et al."岩溶坡地土壤侵蚀强度的~(137) Cs法研究".25.3(2007):302-308.