黄土高原灌丛景观斑块形状的指数和分形分析  

The Shape Indices and Scale Fractal Analysis of Shrub Landscape in the Loess Plateau

作　　者：李斌[1] 张金屯[2] 

机构地区：[1]中北大学化工与环境学院,太原030051 [2]北京师范大学生命科学学院,北京100875

出　　处：《中国农学通报》2009年第22期296-300,共5页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目"黄土高原植被和环境景观格局与动态研究"(30070140);山西省自然科学基金项目"山西矿业废弃地植被重建及其耐性植物筛选培育研究"(2007011079)

摘　　要：利用地理信息系统技术结合景观斑块形状指数和分形分析方法,对黄土高原地区灌丛景观斑块的形状以及空间特征进行了分析。结果表明:黄土高原地区32类灌丛景观斑块形状指数都比较大,灌丛斑块的边界率都比较高,形状明显偏离于圆形和方形,为不规则形。不同类型灌丛景观斑块分维数变化较大,头花杜鹃、百里香叶杜鹃灌丛的分维最大,其格局是最为复杂的。蒙古扁桃灌丛的分维分维最小,其格局是最简单的。这些都反映出黄土高原地区灌丛景观异质性较大。The shrub is adapted to the Loess Plateau conditions with frequent and poor soils. The distribution of shrub in Loess Plateau has obvious characteristics, and studying the shrub characteristics is important for scientific prevention of vegetation. By using Geographical information system combining the Shape Indices and Scale fractal of landscape, this paper studies the patch shape and their spatial distribution of shrub landscape. The results show that The values of shape indices of shrub landscape are comparatively great, which illustrates that the shapes of shrub patches are obviously deviated from circle and squire, and perform as irregular shapes with great length of patch boundary. The fractal dimensions of different shrub patches are varied greatly, the fractal dimensions of Form. Rhodedendron capitatum, R.thymifolium is maximum, the fractal dimensions of Form. Prunus mongolica is minimum, which further indicate that the heterogeneity of shrub landscape in Loess Plateau is great.

关 键 词：灌丛景观 形状指数 分形分析 黄土高原 

分 类 号：S3[农业科学—农艺学]