白浆土型人参栽培床土的分形维数特征

Properties of fractal dimensions of albic soil for radix ginseng culture

摘要: 运用土壤颗粒表面分形维数计算方法，研究了吉林省白浆土型人参栽培床土的分形维数的特点。结果表明白浆土型人参床土颗粒表面的分形维数介于2.890～2.963之间，并随黏度增加有增大的趋势。同时统计分析表明，土粒表面分形维数与土壤的容重、孔隙度及难效水(水吸力>60 kPa)均具有显著相关性(相关系数分别为0.747^*，0.796^*和0.798^*)；与土壤中>0.25 mm团聚体的百分含量呈极显著的相关(相关系数为0.826^**)。分形维数可以作为衡量白浆土型人参床土的物理肥力指标之一。

Abstract: The method for calculating the factal dimensions of soil particle surface was used to study properties of fractal dimensions of albic soil for radix ginseng culture in Jilin Province. The results indicated fractal dimensions of soil particle surface were 2.890～2.963 and increased with the increase of soil viscosity. Statistic analysis indicated that fractal dimensions were in the partial correlation with bulk density, pore space, content of on-available water, and larger than 0.25 mm aggregates(coefficients are 0.747, 0.796, 0.798 and 0.826). Fractal dimensions may be used to judge physical fertility of albic soil for radix ginseng culture.