桂南地区10种珍贵树种人工林早期生长表现∗

摘要

To investigate the germplasm preservation effect of 10 rare tree species, several growth indicators such as height, diameter, and crown size were tested and analyzed by using variance analysis, multiple comparison, correlation analysis, fuzzy cluster analysis. The results showed that there was extremely significant differences in height, diameter and crown size among 10 rare tree species (p<0. 01); Except for the correlation between height and crown size of Betula alnoides and Dalbergia odorifera, the other tree species all had significant correlation in terms of growth indicators. In terms of the early growth performance of all tree species, Betula alnoides and Zenia insignis were the most fast-growing species, Michelia macclurei, Tectona grandis and Dalbergia odorifera took the second place, Castanopsis hystrix and Schima superba were in medium growth rate, and Erythrophleum fordii, Burretiodendron hsienmu and Aquilaria sinensis were fairly slow-growing. These results would inevitably provide an important reference for genetic diversity research and propagation of rare tree species.%为研究珍贵树种林木种质资源收集保存效果,对10个珍贵树种进行树高、胸(地)径、冠幅生长指标测定,并进行方差分析、多重比较、相关性分析、聚类分析。结果表明,10个树种间树高、胸(地)径、冠幅生长均表现出极显著差异(P<0．01)；除西南桦、降香黄檀的树高与冠幅不相关外,其余树种生长指标间都极显著相关；早期生长表现西南桦、任豆最速生,火力楠、柚木、降香黄檀生长较快,红锥、木荷生长中等,格木、蚬木、土沉香生长较慢。研究结果将为珍贵树种遗传多样性研究和良种繁育提供参考。