对红花木莲等5个木兰科珍贵用材兼景观树种开展了造林试验和早期生长特性观测研究,结果显示:5个树种高生长在造林第2年开始加速,早于地径和冠幅,地径和冠幅生长加速同步。5个树种年季间树高生长存在明显差异,而地径差异不显著。冠幅生长加速在造林第4年最快,红花木莲、乐昌含笑和亮叶含笑具宽冠幅生长趋势,而云南拟单性木兰和乐东拟单性木兰顶端生长优势明显,表现为窄冠。5个树种造林初期主要以高生长方式占据生长空间,树高生长表现较好的是红花木莲、云南拟单性木兰和乐东拟单性木兰。
The article conducts an afforestation experiment and study on early growth characteristics of 5 kinds of pre-cious timber and landscape tree species of Mgnaclaceae .The results show that the height growth of 5 tree species speeds up after 2-year afforestation ,which is earlier thanthe growth of ground diameter and crown diameter .The growth ofground diameter and crown diameterspeed up at the same time .There are significant differences inheight growth in different years ,while no significant difference in ground diameter growth .The growth of crown diameter-speeds up the fastest at the 4th year of afforestation .The growth of crown diameter of Manglietia insignis ,Michelia chapensis and Michelia fulgens tend to grow in width ,but that of Parakmeria yunnanensis and Parakmeria lotungensis tend to have advantages in apical growth ,which presents as narrow crown ,The 5 tree species mainly occupy the liv-ing space by height growth way in the early afforestation .The tree height growth of Manglietia insignis ,Parakmeria yunnanensis and Parakmeria lotungensis are better than the other two .