摘要
分维数和稳定性指数是土壤空间分布的重要指数。通过建立安徽省土壤的空间数据库,运用分形理论,获得安徽省土壤类型周长与面积的关系,进而计算出各类土属在空间上的分维数和稳定性指数大小,得出如下结论:①安徽省土壤图斑的周长与面积之间存在双对数函数关系,相关性系数大部分在0.9以上,证明了安徽省土壤空间分形的客观存在。②安徽省各类土壤空间分维数大小在1.1375—1.9948之间,平均值为1.6138,最大的是泥质岩砾质土,最小的是脱青湖泥田。分维数在空间分布上存在差异,总的趋势是从西北向东南逐渐变大。③各种土属的稳定性指数在1.0252—0.0124之间,平均值约为0.2324,最大的是湿潮土,最小的是砂礓黄土。
Fractal dimensions and stability index were very iinportant in spatial distribution of soils. By establishing spatial database of soils different type in Anhui, the relationship between perimeter and area of patches were founded, then the fractal dimensions and stability index of soils different in type were calculated. The result showed as follows ： ①There was ftmctional relationship between perimeter and area of patches of soils different type in Anhui, and the most correlation coefficients were lfigher than 0. 9. ②The value of fractal dimensions of soils different in type were between 1. 1375 and 1. 9948 ,the average value was 1.6138 .The soil of maximum value was clayey lithosol and the minimum was lacustrine fluviodegleyed paddy soils. The fractal of spatial distribution was different from regions and the value of fractal dimensions tended to increase from northwest to southeast.③The stability index of spatial structure of soils were between 1. 0252 and 0. 0124, the average value was 0. 2324. Mad the soil of maximum value was wet Chao soils and the minimum was Shajiang paleclark soils.
出处
《资源开发与市场》
CAS
2007年第12期1077-1080,1088,共5页
Resource Development & Market
基金
安徽省软科学项目(编号:06035020)
安徽省教育厅自然科学基金(编号:2006kj185B)
安徽师范大学优秀创新团队建设计划资助
关键词
分形
土壤
空间分布
安徽
fraetal
soils
spatial distribution
Anhui
