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《Acta Agrestia Sinica》 2009-03
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Principal Component and Canonical Correlation Analysis of the Environmental Factors Influencing the Growth of Caragana korshinskii Kom. in Grassland

WANG Qian1,CHENG Ji-min2*,WAN Hui-e2(1.College of Animal Science and Technology,Northwest A& F University,Yangling,Shaanxi Province 712100,China;2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi Province 712100,China)  
The growth process of Caragana korshinski Kom.was studied in Dong mountain grassland at Shanghuang Hechuan of Guyuan,NingXia Hui Autonomous Region based on the observation data from 1985 to 2007 using principal component and canonical correlation analysis on 18 indices which were chosen to represent growth factors,climatic factors,terrain factors,and soil moisture factors.The results show that 5 principal components were obtained by principal component analysis,among which the climatic and terrain factors influenced the growth and soil moisture factors,and growth factors were restricted by soil moisture factors.The canonical correlation analysis indicate the relationships of four indices(growth,climatic,terrain,and soil moisture factors) were as follows: accumulated temperature and evaporation influenced ground diameter and biomass;SW1,SW2,SW3,SW4,SW5,and SW6 were jointly influenced by slope position,altitude,accumulated temperature,and evaporation;biomass,plant height,and crown width were mainly influenced by SW2,SW3,SW4,and SW6.
【Fund】: 国家重点基础研究发展计划973项目(2007CB106803);; 国家科技支撑课题(06BAD09B08);; 自然科学基金重点项目(40730631);; 国家林业局荒漠化监测专项
【CateGory Index】: S54
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