【摘要】 对四川省北川县在5.12地震中21个受损林地进行立地调查,采用因子分析法进行主导因子提取。结果表明,在该范围内,土壤硬度变量在第1因子中占有较大比重,为0.910,因此第1因子主要反映的是土壤情况;基岩类型变量在第2因子中占0.895,因此第2因子反映的是基岩情况;坡向变量在第3因子中占0.832,因此第3因子主要反映的是地形情况。更多还原

【Abstract】 The investigation about 21 plots of damagedland wood in Beichuan was conducted with the methods of factor analysis.The results showed that soil hardness accounted a large proportion of 0.910 in the first main component,so the first factor reflected the soil conditions;bedrock type occupied 0.895 in the second main component,so the second factor reflectd the bedrock circumstances;aspect occupied 0.832 in the third main component,so the third factor mainly reflected the terrain.更多还原