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《Journal of Anhui Agricultural Sciences》 2008-11
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Research on the Factors Influencing Soil Evaporation Ability Based on Principal Component Analysis

WANG Guan-li et al(College of Hydraulic and Civil Engineering,Inner Mongolia Agricultural University,Huhhot,Inner Mongolia 010018)  
[Objective] The purpose was to supply reference for researching the soil evaporation of sand land.[Method] The principle components of 18 influencing factor series related to the soil evaporation ability of sand land were analyzed by principle component analysis so as to research the factors influencing soil evaporation ability.[Result] Through the deletion of eigenvalue and eigenvector and discarding analysis of surplus variable,the principle component was ascertained as an integrated eigenvector together consisted of 11 dependent variables finally and their corresponding loads were higher than 75%.The factors influencing soil evaporation ability of sand land were classified into 3 categories i.e.temperature,humidity and wind velocity factors.Among many influencing factors,the wind velocity and relative humidity at the height of 2.0 m from ground were outstanding and the cumulative load values of their corresponding factors were 94.3% and 94.2% resp.[Conclusion] The influences of meteorological factors at the height of 2.0 m from ground on the soil evaporation ability were most significant.
【Fund】: 国家自然科学基金(50569001);; 国家科技部重大基础研究前期研究专项基金(2005CCA05200);; 内蒙古重点科技攻关(20040702)资金资助
【CateGory Index】: S152
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