机构地区: 北京林业大学水土保持学院教育部水土保持与荒漠化防治重点实验室
出 处: 《广东农业科学》 2012年第9期148-150,共3页
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。 The investigation about 21 plots of damagedland wood in Beiehuan 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.