农业工程学报2012，Vol.28Issue(5)：120-125,6.DOI:10.3969/j.issn.1002-6819.2012.03.020
岷江上游干旱河谷土壤粒径分布分形维数特征
Fractal dimension of soil particle-size distribution characteristics in dry valley of upper Minjiang river
摘要
Abstract
Fractal is one of the impersonality characteristics of soils. In order to study correlation of fractal dimension with soil properties and related affecting factors, the fractal dimensions of particle-size (Ds) for 161 surface (0-20 cm) soil samples under different land use patterns collected from the dry valley of upper Minjiang River were calculated by the equation of volume fractal dimension. The spatial distribution of the Ds values as well as the correlations between Ds and volumetric contents of particle size, organic matter and soil nutrients were analyzed. Ds can be used as an important parameter for characterizing the soil structures and properties. The research showed that: soil particle size distribution had different fractal characteristics under different land use patterns, its fractal dimensions were between 2.5421 to 2.6691, where silty loam > loam> sandy loam, and Ds values of farmland were bigger than the woodland. Ds had a highly significant positive correlation with the volume percentage of soil clay (<0.002 mm) and silt (0.002-0.05 mm), as well as the total potassium contents, whereas a highly significant negative correlation with the volume percentage of soil sand (>0.05 mm) contents. But the correlations of A with the contents of soil organic matter, soil total nitrogen, total phosphorus, available phosphorus and potassium were not significant. The result can provide a theoretical guidance for vegetation restoration and land use development.关键词
土壤/质地/分形/粒径分布/体积分形维数/岷江上游Key words
soils/ textures/ fractal/ particles-size distribution/ volume fractal dimension/ the Minjiang river分类
农业科技引用本文复制引用
伏耀龙,张兴昌,王金贵..岷江上游干旱河谷土壤粒径分布分形维数特征[J].农业工程学报,2012,28(5):120-125,6.基金项目
国家重点基础研究发展规划(973)项目(2007CB 106803) （973）
中科院知识创新工程重要方向(KZCX2-YW-441) （KZCX2-YW-441）
