红色荒漠化雏议

根据国际上对于荒漠化概念的新说明以及由联合国环境规划署所资助的《中国荒漠化 (土地退化 )防治研究》课题报告中确定的荒漠化定义 ,荒漠化概念的内涵包括 :1)以土地退化为本质 ;2 )与人类活动相关联 ;3)以荒漠化景观为标志 ;4 )以脆弱生态环境为背景。因此我国的荒漠化类型除了风蚀作用形成的沙质荒漠化外 ,还有水蚀作用形成的土质荒漠化和石质荒漠化 ;荒漠化防治的重点区域除北方干旱、半干旱和半湿润地区以外 ,也包括南方湿润地区的红壤丘陵区和石质山区。其中属于水蚀荒漠化和土质荒漠化的红色荒漠化就是指我国南方红壤丘陵区在人类不合理经济活动和脆弱生态环境相互作用背景下 ,以流水侵蚀为主导作用而形成、以地表出现劣地为标志的严重土地退化。鉴于我国南方红色荒漠化现象在我国现实存在中的客观性、在全球变化中的特殊性以及在理论概念上的模糊性 ,有必要对其进行深入研究

OPINION ON RED DESERTIFICATION AND TYPES OF DESERTIFIED LAND IN CHINA

According to the new explanation of desertification in the world and the definition of desertification in the study on combating desertification/land degradation in China, a report of the project supported by ESCAP/UNEP,the contents of desertification should include:1) The essence of desertification is land degradation;2) Desertification is closely related to human activities;3) Desertification is marked by the occurrence of desert like landscape on ground surface ;4) The natural background of causing desertification is vulnerable eco environment. So, there are also earthy desertification and rocky desertification formed under water erosion among types of desertified land in China.The key regions for combating desertification in China include also red earth hilly areas and rocky hilly areas in the humid areas of southern china, in addition to the arid and semi arid and sub humid areas of northern China. Red desertification which belonging to earthy desertification is induced by water action,and indicates the serious land degradation as marked by the occurrence of bad land on ground surface and caused by interactions between irrational human activities and vulnerable eco environment in red earth hilly areas of southern China.The phenomenon of red desertification is objectively existent in southern China,it is essential to further investigate the red desertification.