摘要
科尔沁沙地农牧交错景观的分形分析表明，在流动沙丘、放牧场和农田三种斑块类型中，放牧场斑块的分维数在所分析的三类中最高，说明其空间格局最复杂．农田斑块的分维数最低，形状上相对简单．放牧过程对沙地景观的影响要大于农业活动．分维数与面积关系的分析表明：随面积的增加，分维数总体上呈波浪式增加．农田和放牧场斑块的间隙度和观察尺度有较好的线性关系和自相似性，具有分形结构．流动沙丘斑块的间隙度随尺度的变化比较复杂，曲线有转折点（在尺度为６和１３时），说明流动沙丘斑块在景观中受到复杂过程的影响．
Fractal analysis method has been used to describle and analyze the landscape of Agri grazing ecotone in kerqin region.Here,we demonstrate the fractal dimensions of single patch for pasture,cropland,and shifting sand dune.The fractal dimensions of pasture patches is higher than cropland patches,this indicatc grazing proccss has morn dramatically impact than agricultural action.The relationship between areas and the fractal dimensions is complex,but that medium size patches(17￣51 hm 2) have highest fractal dimensions is clearly shown in this study.The log lacunarities of pasture and cropland patches are exposed well in linear correlation with log area and illustrated that they have affinity and fractal structure in spatial patterns.Otherwise,the drifting sand dune patches has different fractal structure in different scales,variation points lie to 6 and 13 hm 2.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
1999年第4期513-517,共5页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家九五重点攻关课题
国家自然科学基金
关键词
农牧交错区
景观
科尔沁地区
沙地
分形结构
Agri grazing ecotone
landscape
patches
Fractal analysis
Kerqin region
