摘要
运用分形模型对不同紫色母质发育的土壤团聚体特征进行研究,结果表明:土壤团聚体粒径分布的分形维数与土壤团聚体结构破坏率存在极显著正相关(r=0.961**,n=8),与>0.25mm水稳性团聚体含量存在极显著负相关(r=-0.958**,n=8);不同紫色母质发育的土壤团聚体粒径分布的分形维数存在差异,棕紫泥土壤团聚体粒径分布的分形维数最高,暗紫泥土壤团聚体粒径分布的分形维数最低。土壤团聚体粒径分布的分形维数是评价土壤物理肥力和土壤抗蚀性的一个新指标。
The fractal models are applied to research the characters of soil aggregates developed from different purple parent material. The results show that the fractal dimensions are significantly regressive correlated with the structure damage rates of soil aggregates(r=0.961**,n=8)and the contents of waterstable aggregates(r=-0.958**,n=8); the fractal dimensions of soil aggregates particle fraction developed from different purple parent material are various; that of brown purple soil aggregates particle fraction takes the first place, and that of dark purple argils aggregates fraction is minimum; it may be inferred that fractal dimension is a new index which evaluates soil physical fertility and soil erosionresistant capability.
出处
《水土保持学报》
CSCD
北大核心
2003年第1期131-133,182,共4页
Journal of Soil and Water Conservation
基金
教育部博士点基金项目(2000062505)
西南农业大学博士基金资助
中国科学院知识创新工程(KZCW-Z-SW-319-3)
关键词
紫色母质
土壤团聚体
分形维数
purple parent soil
fractal dimensions
soil aggregate