首页 | 本学科首页   官方微博 | 高级检索  
     检索      

典型喀斯特地区石漠化演变过程对土壤质量性状的影响
引用本文:龙健,李娟,汪境仁,李阳兵.典型喀斯特地区石漠化演变过程对土壤质量性状的影响[J].水土保持学报,2006,20(2):77-81.
作者姓名:龙健  李娟  汪境仁  李阳兵
作者单位:1. 贵州师范大学,地理与生物科学学院,贵州,贵阳,550001
2. 河南农业大学,资源与环境学院,河南,郑州,450002
基金项目:中国科学院资助项目;贵州省自然科学基金;贵州优秀教育人才省长基金
摘    要:在一个较小的时空尺度上对典型喀斯特地区石漠化过程中的土壤质量演变特征及其退化过程进行了探讨。结果表明:由于植被破坏和耕地的开垦发生土壤颗粒粗化,向石漠化景观发展,土体结构破坏,容重增加0.12~0.60g/cm^3,总孔隙度降低12.0%~39.8%,持水性能变劣,养分也随之下降;〈0.05mm的粘粉粒流失,表层土壤有机质和全氮含量下降33.4%~84.6%和43.3%~85.2%。土壤质量的演变,既有系统本身的自然属性决定的内在原因,更重要的是人为的外部干扰体系的驱动;演变的过程既有渐变型,又有跃变型。

关 键 词:喀斯特地区  土壤质量  石漠化  过程和特征
文章编号:1009-2242(2006)02-0077-05
收稿时间:2005-06-08
修稿时间:2005-06-08

Effects on Soil Quality Properties in Process of Karst Rocky Desertification
LONG Jian,LI Juan,WANG Jing-ren,LI Yang-bing.Effects on Soil Quality Properties in Process of Karst Rocky Desertification[J].Journal of Soil and Water Conservation,2006,20(2):77-81.
Authors:LONG Jian  LI Juan  WANG Jing-ren  LI Yang-bing
Institution:1. College of Geography and Biology Science, Guizhou Normal University, Guiyang 550001; 2. College of Resonrce and Environment Science, Henan Agriculture University, Zhengzhou 450002
Abstract:From the aspects of physics and chemistry,the process and characteristics of soil quality degradation in Guizhou karst area were discussed.Results showed that in the rocky desertifcation process of soil,a series of physical and chemical properties worsened associated with losses of soil fine particle materials,including bulk density raised,total porosity reduced,aeration and non-capillary porosity increased,water-holding capacity relented,soil organic matter,total N and P contents decreased.the majority of silt and clay contents(<0.05 mm) were removed,could result in the decreases of soil organic matter and total N contents.Dusiturbances induced by farmers(i.e.irrational land cultivation and vegetaion was destroied) was the main force of soil quality evolvement.The models of soil quality degaradation process was gradual degradation course and leap degradation course.
Keywords:Karst area  soil quality  degaradation  process and character
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《水土保持学报》浏览原始摘要信息
点击此处可从《水土保持学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号