贵州省石漠化敏感性在不同地貌类型区的动态变化

Dynamic Changes of Rocky Desertification Sensitivity in Different Landform Types in Guizhou

为给不同地貌类型区的石漠化防治工作提供科学依据,对贵州省20世纪60年代和2000年的石漠化敏感性在不同地貌类型中的动态变化规律进行了研究。结果表明,从60年代到2000年不敏感类型面积呈下降趋势,敏感类型面积呈上升趋势。石漠化敏感度类型正向演变与逆向演变并存,石漠化各类型之间演变非常明显,逆向演变面积远远大于正向演变面积,说明贵州省石漠化状况整体呈现恶化趋势,局部地区有所好转。

The dynamic changes of rocky desertification sensitivity from 1960＇s to 2000 were analyzed to provide the scientific basis for prevention and control of rocky desertification in regions with different landform types in Guizhou.The results showed that the area of the insensitivity type was on a declining trend and the area of the sensitivity type was on the rise from 1960＇s to 2000,there were forward evolution and backward evolution in sensitivity types of rocky desertification,the evolution of different rocky desertification types was very obvious,and the area of backward evolution was significantly higher than the area of forward evolution,which indicates that the rocky desertification is on a deteriorative trend in most areas of Guizhou province.