内蒙古乌拉盖地区景观破碎化与土地利用对策的研究

本文利用ＲＳ，地面调查和ＧＩＳ相结合的手段，对位于内蒙古锡林郭勒盟东北部的乌拉盖草甸草原区景观破碎度分３个时期（１９８８－１９９２，１９９３－１９９５，１９９６－１９９７年）进行动态研究，并选用３种不同的指标：斑块密度指数、廊道密度指数、景观班块破碎化指数，对该区的景观破碎度进行了测算分析，进而探讨了该区土地利用存在的问题和对策。结果表明：１．总体班块密度指数在三个时期分别为０．０１２５个．ｋｍ－２、０．０５８２个．ｋｍ－２、０．１１２．ｋｍ－２；２．廊道密度指数在三个时期都约为０．０５３８ｋｍ．ｋｍ－２；３．整体景观斑块数破碎化指数在三个时期分别为０．００２５、０．０１１６、０．０２２３。说明，随着人类干扰的增加，景观的破碎化程度加大，土地利用不合理的有关问题不容忽视。

RESEARCH ON LANDSCAPE FRAGMENT AND COUNTERMEASURES OF LAND UTILIZATION IN WULAGAI AREA OF INNER MONGOLIA

In This paper,the landscape fragment of the WuLagai area lying in the northeastern part of XiLingGuole League is studied by division into three periods (1988￣1992,1993￣1995,1996￣1997) and three indexes (patch density index,corridor index,fragment index) which are used to calculate its fragmentation with remote sensing,GIS and onthespot investigation,.Then some problems and contermeasures in the land utilization are inquired into.The results show:the total patch density indexes in three periods are 0.0125 individual·km -2 ,0.0582 individual·km -2 and 0.0116 individual·km -2 ;the corridor density indexes are all approximately 0.0538·km -2 ;and the landscape fragment indexes in three periods are:0.0025,0.0116 and 0.0223 respectively.Landscape fragmentation is closely related to human activities and the fragment level is increased with increasing human activities,morever,the problems used irrationally land resources can not be ignored.