| 土地石漠化概念与分级问题再探讨 |
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| 引用本文： | 李森,董玉祥,王金华.土地石漠化概念与分级问题再探讨[J].中国岩溶,2007,26(4):279-284. |
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| 作者姓名： | 李森 董玉祥 王金华 |
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| 作者单位： | 1.佛山大学资源与环境科学研究所 2.西北师范大学地理与环境科学学院 3.中山大学地理科学与规划学院 |
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| 摘 要： | 针对前人研究中将石漠化发生的地域限定在亚热带,将发生的时间限定在人类历史时期,将发生的原因均归结为人为不合理的经济活动,而忽视了石漠化可能发生的其它地域、其它时期和其它成因等问题,对土地石漠化概念作了修正。认为土地石漠化是在湿润、半湿润气候环境和岩溶环境中,由于人类活动和/或气候变化等因素作用,造成地表植被退化、土壤侵蚀、地表水流失、基岩裸露,形成类似石质荒漠景观的土地退化过程,并对其内涵作出释义。在此基础上依据生态基准面的理论,以坡面形态、溶蚀岩溶地貌形态、基岩出露率、土壤厚度和土被覆盖度、土壤侵蚀程度、植被覆盖率和植物种群、土地利用类型等为景观指征,将石漠化土地分为轻度、中度、重度和极重度4个等级,并以粤北岩溶山区为例,拟定了区域性石漠化土地分级及其综合景观指征。
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| 关 键 词： | 土地石漠化概念 石漠化土地分级 石漠化景观指征 南方岩溶区 粤北 |
| 文章编号： | 1001-4810（2007）04-0279-06 |
| 收稿时间： | 2007-07-31 |
| 修稿时间： | 2007年7月31日 |
Re-discussion on the concept and classification of rocky desertification |
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| LI Sen,DONG Yu-xiang and WANG Jin-hua.Re-discussion on the concept and classification of rocky desertification[J].Carsologica Sinica,2007,26(4):279-284. |
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| Authors: | LI Sen DONG Yu-xiang and WANG Jin-hua |
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| Institution: | 1.Institute of Resources and Environment Science, Foshan University 2.College of Geography and Environment Science , Northwest Normal University 3.School of Geography and Planning , Zhongshan University, |
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| Abstract: | Earlier studies considered that the rocky desertification happened during the human history period and in the subtropical area,which resulted from anthropogenic unreasonable economic activities.But this point ignored that the rocky desertification would occur in other possible period and location,result from other reasons.This article corrected the concept of rocky desertification,considered that rocky desertification is the process of land degradation with similar to rocky desertification landscape which formed by degeneration of vegetation in the earth's surface,erosion of soil,loss of surface water and the outcropping of bedrock under moist and semi-moist climatic environment and karst environment,due to the factors of human activity and(or) changes of climate etc.The article also explained for its connotation.According as the theory of ecological datum plane,we brought land classification and synthetic landscape indications of rocky desertification,classified the rocky desertification lands into four grades as light,middle,serious,and super serious,graded each rocky desertification land with indexes which including rate of outcrops,form of karst physiognomy,gradient of the earth's surface,thickness of soil,coverage degree of mantle rock,degree of soil erosion,coverage rate of vegetation,plant and types of land use.It also put forward the land classification and their synthetic landscape indications of rocky desertification land by taking the karst mountainous area of north Guangdong as example. |
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| Keywords: | concept of rocky desertification classification of rocky desertification land rocky desertification landscape indications South karst area North Guangdong |
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