闽北山地不同模式福建含笑-杉木混交林土壤结构的分形特征  

Fractal Character on Soil Structure in Different Forest Patterns of Mixed Forest of Michelia fujianensis and Cunninghamia lanceolata in North Fujian Mountain

作　　者：林武星[1] 郑郁善[2] 朱炜[1] 

机构地区：[1]福建省林业科学研究院,福建福州350012 [2]福建农林大学林学院,福建福州350003

出　　处：《热带作物学报》2015年第12期2245-2249,共5页Chinese Journal of Tropical Crops

基　　金：福建省科学基金资助项目(No.1992-023);福建省森林培育与林产品加工利用重点实验室项目

摘　　要：运用分形理论研究了闽北山地不同模式福建含笑-杉木混交林包括福建含笑与杉木1∶1行间混交林、1∶1株间混交林、福建含笑纯林和杉木纯林的土壤结构和理化性质,阐明不同模式福建含笑-杉木混交林土壤结构的分形特征,建立福建含笑-杉木混交林土壤水稳性团聚体、团聚体含量和结构体破坏率与分形维数回归模型,以及土壤水稳性团聚体、团聚体含量的分形维数与土壤各项具体的理化性质指标的关系式。结果显示:福建含笑-杉木混交林土壤水稳性团聚体和团聚体含量与其分形维数呈负相关,而结构体破坏率与分形维数之间正相关;土壤水稳性团聚体和团聚体含量的分形维数与其对应的土壤理化性质指标存在显著回归关系。福建含笑与杉木1∶1行间混交林土壤水稳性团聚体和团聚体含量的分形维数均最小,土壤水稳性团聚体和团聚体含量最高,土壤结构和稳定性最好。运用分形理论研究林地土壤肥力状况为林地质量评价提供了一种新思路。The soil structure, physical and chemical properties in different forest patterns of mixed forest of Michelia fujianensis and Cunninghamia lanceolata including 1：1 line mixed, 1：1 strain mixed, Michelia fujianensis pure stands and Cunninghamia lanceolata pure stands in north Fujian mountains were studied using the fractal theory. The fractal character in different forest patterns of mixed forest of M. fujianensis and C. lanceolata was clarified. The regression modes were built between the content of I〉 0.25 mm soil water-stable aggregate constitution, aggregate constitution, percentage of construction damage and the soil fractal dimension, as well as between the fractal dimension of soil water-stable aggregate constitution, aggregate constitution and the index of soil physical and chemical properties. The results indicated that the soil fractal dimension showed negative correlation with the content of I〉 0.25 mm soil water-stable aggregate constitution and aggregate constitution but positive correlation with percent of construction damage. The soil fractal dimension showed significant regression relationships with physicochemical properties. The soil fractal dimension of the content of water-stable aggregate constitution and aggregate constitution in line mixed of 1 ： 1 of M. fujianensis and C. lanceolata was the least, which showed the best in structural stability and fertility status. The application of the fractal theory on the forest soil fertility provides a new idea for forest assessment.

关 键 词：福建含笑 杉木 混交林 分形维数 土壤结构 土壤肥力 

分 类 号：S152.4[农业科学—土壤学] S725.2[农业科学—农业基础科学]