对广东高明云勇林场的火力楠Michelia macclurei纯林及其混交林2004～2007年的生长状况进行调查。运用多重比较方法分析上、中、下坡位的火力楠地径、树高、冠幅。结果表明，4年间(林分当年至3年生)所有样地的火力楠幼树平均地径、树高和冠幅均有显著增长。坡位对火力楠的地径生长具有显著影响，各坡位的火力楠平均地径为上坡>中坡>下坡，而坡位对树高和冠幅的影响不明显。%The growth ofMichelia macclurei on pure and mixed plantations was investigated from 2004 to 2007 in Gaoming Yunyong forest farm. Ground diameter, tree height and crown width of trees in upper-, middle- and down-slope positions were analyzed by multiple comparison analysis. The results showed that the average ground diameter, tree height and crown width ofM. macclurei trees in the three plots slope positions significantly increased from 2004 to 2007. Slope position had a significant impact on ground diameter growth of M. macclurei, and average ground diameter decreased in the order upper-slope position > middle-slope position > down-slope position, whereas effect of slope position on tree height and crown width was not obvious.
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