合果木等3种木兰科植物在中山市生长表现分析*

为探讨合果木（Paramichelia baillonii）、火力楠（Michelia macclurei）、灰木莲（Magnoliaceae glanca）3种木兰科植物在中山市的生长表现，对三乡、长江水库、五桂山及中山树木园4个造林地点3种植物的树高、胸径、冠幅和枝下高进行调查分析。结果表明，3种木兰科植物生长速度排名为灰木莲＞火力楠＞合果木；在4个造林地点的生长表现依次为：树木园＞五桂山＞三乡＞长江水库。通过对3种木兰科植物各指标的相关性分析发现，树高和胸径的相关性系数最大，其次为树高和枝下高，相关系数均在0.7以上。3种木兰科植物在中山市生长较为迅速，适合营造城市复合景观，有很好的园林开发利用前景。

Comparison on Growth Performance of Three Magnoliaceae Species in Zhongshan City

In order to understand the growth performance ofParamichelia baillonii,Michelia macclurei andMagnoliaceae glanca,the growth index of three Magnoliaceae species were investigated in Sanxiang, Changjiang Reservoir, Wugui Mountain and Zhongshan arboretum in Zhongshan city, Guangdong Province. The results showed that the growth rate of three Magnoliaceae species from high to low wasMagnoliaceae glance>Michelia macclurei>P.baillonii, and the order for growth performance at four places wasZhongshanarboretu>Sanxiang>Wugui Mountain>Changjiang Reservoir. The results of correlation analysis indicated that the correlation coefficient of tree height andDBHwere the highest, and the tree height and clearable height were followed which the correlation coefficient were both higher than 0.7. The three Magnoliaceae species, which showed strong adaptability in Zhongshan city, had excellent exploitation and utilization prospect in application of urban composite landscape.