水土保持学报2011，Vol.25Issue(3)：154-159,6.
重庆四面山几种林地土壤颗粒分形特征及其影响因素
Fractal Characteristics and Related Affecting Factors of Particle Size Distribution of Different Forest Soil in Simian Mountains,Chongqing
摘要
Abstract
Based on fractal theory, fractal characteristics of different forest soil were studied in Simian mountains, Chongqing, and correlation of fractal dimension with particle size distribution and related affecting factors were also discussed. Results indicated that there were significant differences:①In the soil profile (0-60 cm), average fractal dimensions were as follows: conifer forest land＞conifer-broadleaf forest land＞Phyllostachys pubescens land＞broadleaf forest land. Broadleaf forest and Phyllostachys pubescens land had relatively loose structure with better permeability while conifer-broadleaf forest and conifer forest land had better water holding capacity and fertilizer performance. ②In the soil profile, fractal dimension of broadleaf forest land decrease significantly, while Phyllostachys pubescens land increase, the change of conifer-broadleaf forest land and conifer forest land are not evident. These changes agreed well with the tendency of clay content. ③Fractal dirnensions could be used to describe particle size distribution and the reflections are different. Fractal dimension mostly depends on clay content(R= 0.964)and had a significant negative correlation with sand content(R=-0.873) ,but the correlation with silt content was not obvious(R=-0.004). ④Multivariate regression analysis showed that fractal dimension had relativity with organic matter content, total nitrogen, rapidly available phosphorus, rapidly available kalium, capillary porosity, non-capillary porosity,saturated water content, capillary moisture capacity and field capacity.关键词
重庆四面山/林地土壤/分形维数/粒级分布Key words
Simian mountains in Chongqing/ forest soil/ fractal dimension/ particle size distribution分类
农业科技引用本文复制引用
王贤,张洪江,程金花,张焜 ,张静雯,宋楠,孙龙..重庆四面山几种林地土壤颗粒分形特征及其影响因素[J].水土保持学报,2011,25(3):154-159,6.基金项目
国家自然科学基金项目(40771042,30900866) （40771042,30900866）
国家"十一五"科技支撑项目"林业生态建设关键技术研究与示范"专题(2006BAD03A1304) （2006BAD03A1304）
国家林业局"948"项目(2006-4-26) （2006-4-26）
