优良生态树种杂种鹅掌楸引种研究

The Introduction Experiment of Excellent Eco-tree-species-Hybrid Liriodendron

设置5个观测样地,每个样地取36株样品,连续5 a观测记载胸径和树高等情况,分析其生长过程。结果表明,杂种鹅掌楸无性系二代胸径平均生长量随着树木年龄的增长,已逐步适应引种地的生长环境,且呈加速生长势头。杂种鹅掌楸是适应江淮分水岭地区生长的优良生态树种,林业三大效益显著,值得大面积推广。

Five observation sites were set,and the diameter at breast height（DBH） and tree height of 36 samples from each observation site were recorded for 5 consecutive years to analyze the growth process of hybrid Liriodendron.The results showed that as the average annual growth of DBH of second-generation hybrid clone of Liriodendron increased with the increasing tree age,the Liriodendron gradually adapted to the growth environment of introduction site,even showed an accelerated growth potential.The hybrid Liriodendron is an excellent eco-tree-species,which is suitable to grow in the watershed regions between Yangtze River and Huaihe River,and it has remarkable three major benefits of forestry,so it is worth for large-scale promotion.