分形理论在集材道土壤团聚体研究中的应用  

Application of fractal theory in studying soil aggregates under different skidding modes.

作　　者：李军锋[1] 赵秀海[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《应用生态学报》2005年第9期1795-1797,共3页Chinese Journal of Applied Ecology

基　　金：国家"十五"科技攻关项目(2001BA510B0704);教育部高校青年教师奖励计划资助项目(2000103).

摘　　要：In this paper,the characters of soil aggregates under different skidding modes were investigated by fractal theory.The results showed that the particle fraction of soil aggregates was smaller under tractor- than under animal traction skidding.As for different parts of skidding road,the particle fraction of air-dried soil aggregates was in the order of bottom (2.309) > middle (2.291) > upper (2.014),while that of water-stable aggregates followed the sequence of bottom (2.04) < middle (2.143) < upper (2.262).The particle fraction of aggregates was 2.215 in forest soil and 2.175 in skidding roads.Skidding movement could improve soil aggregates when the cutting intensity was 15%.Tractor skidding was more favorable for soil aggregates formation.In this paper, the characters of soil aggregates under different skidding modes were investigated by fractal theory. The results showed that the particle fraction of soil aggregates was smaller under tractor-than under animal traction skidding. As for different parts of skidding road, the particle fraction of air-dried soil aggregates was in the order of bottom （2.309） 〉 middle （2.291） 〉 upper （2.014）, while that of water-stable aggregates followed the sequence of bottom （2.04） 〈 middle （2. 143） 〈 upper （2.262）. The particle fraction of aggregates was 2. 215 in forest soil and 2.175 in skidding roads. Skidding movement could improve soil aggregates when the cutting intensity was 15 %. Tractor skidding was more favorable for soil aggregates formation.

关 键 词：分形理论 土壤团聚体 应用 集材道 局部结构 空间变异 非线性现象 计算机科学 运动规律 

分 类 号：S714[农业科学—林学]