地理研究 ›› 2009, Vol. 28 ›› Issue (6): 1615-1624.doi: 10.11821/yj2009060017

• 地表过程研究 • 上一篇    下一篇

峰丛洼地石漠化景观演化与土地利用模式

但文红1,2, 张 聪2, 宋 江2, 王 丽2   

  1. 1. 中国科学院地理科学与资源研究所, 北京 100101;
    2. 贵州师范大学地理与环境科学学院,贵阳 550001
  • 收稿日期:2009-03-27 修回日期:2009-08-25 出版日期:2009-11-25 发布日期:2009-11-25
  • 作者简介:但文红(1967-),女,贵州赤水人,副教授,博士。主要从事农村地理与文化地理研究。 E-mail:danwenhongcn2000@yahoo.com.cn
  • 基金资助:

    国家自然科学基金地区科学基金项目(40761007);博士后基金资助项目(20060400494);贵州省科技合作重点项目(黔科合外G字(2007)400103 )。

An exploratory analysis of both landscape pattern and land use model in peak cluster-depressions rocky desertification areas

DAN Wen-hong1,2, ZHANG Cong2, SONG Jiang2, WANG Li2   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. School of Geographic and Environment Sciences, Guizhou Normal University, Guiyang 550001, China
  • Received:2009-03-27 Revised:2009-08-25 Online:2009-11-25 Published:2009-11-25
  • Supported by:

    国家自然科学基金地区科学基金项目(40761007);博士后基金资助项目(20060400494);贵州省科技合作重点项目(黔科合外G字(2007)400103 )。

摘要:

峰丛洼地石漠化景观格局是土壤分布空间格局的制约下,岩溶生态系统对植被强烈依附性条下,由不同类型人类活动决定的。农耕、放牧和砍伐是最主要的破坏峰丛植被的人类活动;缓坡耕地形成轻度石漠化景观;陡坡地形成中度石漠化景观,因坡面土壤流失,演化为更高等级石漠化景观;峰丛陡坡放牧和砍伐都可能直接形成峰丛上部大面积中-强度石漠化景观,出现峰丛坡面石漠化景观分异,产生不同的土地利用模式。

关键词: 峰丛洼地, 石漠化, 土地利用, 景观格局

Abstract:

Under the condition of dependence of karst ecosystems on vegetation, different types of human activities can induce rocky desertification peak cluster-depressions landscape pattern due to the fact that these activities are constrained by the spatial structure of the soil distribution. The soil distribution of peak cluster-depression is affected by natural conditions such as lithological character, geologic structure, slope, soil loss and so on, thus the special phenomenon of soil dual structure forms: discontinuous and inadequate surface soil, adequate soil stack underground. Because there is insufficient soil at the surface, water conservation mainly depends on vegetation and forest withered leaves at surface in the karst ecosystem, and the plant itself also becomes an important factor for soil forming, so, the biology effect is remarkable during karst process, and the ecosystem strongly relies on vegetation. In peak cluster-depression areas, the primary activity is traditional agriculture which supplies the basic food and energy: cultivating land for farming, felling trees for building materials and energy, cleaning up brush and wasteland for grazing and so on. So farming, grazing and deforesting are the most important human activities that affect the peak cluster vegetation. Human activities can result in mild rocky desertification landscape on gentle-slope cultivated land, moderate rocky desertification landscape along with the soil erosion on slopes, and evolved higher level rocky desertification on steep slopes. Grazing and deforesting on steep slopes of peak cluster can directly cause a large area of moderate-high strength rock desertification landscape on the upper part of the peak cluster, furthermore the rocky desertification landscape differentiation emerges on steep slopes and peak cluster, and presents different land use patterns.

Key words: peak cluster-depressions, rocky desertification, land use, landscape pattern