武夷山风景区森林景观土壤物理性质异质性及其分形特征  

Soil Physical Property Heterogeneity and Its Fractal Features of Different Forest Landscapes in the Wuyishan Scenery District

作　　者：何东进[1] 洪伟[1] 胡海清[2] 吴承祯[1] 陈炳容 

机构地区：[1]福建农林大学,福州350002 [2]东北林业大学,哈尔滨150040 [3]武夷山风景名胜区管理委员会,武夷山354300

出　　处：《林业科学》2005年第5期175-179,共5页Scientia Silvae Sinicae

基　　金：福建省自然科学基金资助项目(C0310018);福建省教育厅资助项目(JA03078);福建省科技厅重大资助项目(2001F007)。

摘　　要：The condition of soil structure is an important factor to affect soil fertility.The soil heterogeneity,which embodies the landscape heterogeneity,has an important role in revealing the form mechanism,function and variation of landscape.In this paper,the soil physical property heterogeneities of six types of forest landscape in Wuyishan scenery district include Pinus massoniana forest, Cunninghamia lanceolata forest,economic forest,bamboo forest,broad leaved forest and Camellia sinensis plantation were analyzed,and the fractal model was used to study the soil aggregate structure.The results showed that the soil physical property heterogeneities of different forest landscapes were distinct.The stand structure of three natural forests( Pinus massoniana forest, Cunninghamia lanceolata forest and broad leaved forest)were more complex than that of three artificial forests(economic forest,bamboo forest and Camellia sinensis plantation),thus,their fractal dimensions of soil aggregate were lower,the contents of the particle > 0.25 mm aggregate and > 5 mm aggregate were higher,the capacity of stable aggregate composition under water and permeability of soil were more splendid,the performance of self-regulation and resistance were better,and the non-capillary pore of soil were more flourishing than artificial forests. The regression models for fractal dimension (D)of aggregated structure and water stable aggregate(>0.25 mm and >5 mm)content,and for D and destroyed structure percentage were further established,and the results indicated the their regression relationships of all the models were remarkable,therefore,the fractal dimension of soil structure could be used as an index in characterizing the soil fertility.The condition of soil structure is an important factor to affect soil fertility. The soil heterogeneity, which embodies the landscape heterogeneity, has an important role in revealing the form mechanism, function and variation of landscape. In this paper,the soil physical property heterogeneities of six types of forest landscape in Wuyishan scenery district include Pinus massoniana forest, Cunninghamia lanceolata forest, economic forest, bamboo forest, broad leaved forest and Camellia sinensis plantation were analyzed, and the fractal model was used to study the soil aggregate structure. The results showed that the soil physical property heterogeneities of different forest landscapes were distinct. The stand structure of three natural forests （ Pinus massoniana forest, Cunninghamia lanceolata forest and broad leaved forest） were more complex than that of three artificial forests （economic forest, bamboo forest and Camellia sinensis plantation）, thus, their fractal dimensions of soil aggregate were lower, the contents of the particle 〉 0.25 mm aggregate and 〉 5 mm aggregate were higher,the capacity of stable aggregate composition under water and permeability of soil were more splendid, the performance of self-regulation and resistance were better, and the non-capillary pore of soil were more flourishing than artificial forests. The regression models for fractal dimension （D）of aggregated structure and water stable aggregate（ 〉 0.25 mm and 〉 5 mm）content,and for D and destroyed structure percentage were further established, and the results indicated the their regression relationships of all the models were remarkable, therefore, the fractal dimension of soil structure could be used as an index in characterizing the soil fertility.

关 键 词：武夷山风景区 森林景观 土壤 异质性 分形维数 

分 类 号：S718[农业科学—林学] Q149[生物学—生态学]