楠木名称考订

ttttt目的ttttt为了解湖北省兴山县的野生楠木资源分布状况、种群结构及其群落特征。ttttttttttttt方法ttttt采用样方法分别在兴山县的南阳镇、古夫镇和峡口镇对楠木资源分布集中地段进行野外实地调查，并记录其生境条件和群落特征。ttttttttttttt结果ttttt调查区内发现野生楠木类植物9种，共计274株。包括楠属植物4种，润楠属植物5种，其中多脉润楠(Machilus multinervia)、刨花润楠(M. pauhoi)初步确定为兴山县新分布记录种。其楠木总体分布较零散，仅在龙门河村有集中分布。它们较多分布在阴坡，坡度为36°~40°，海拔在680 m左右的生境条件下。其楠木类植物群落的维管束植物共有68种，隶属于34科58属，以樟科植物为最多。tttttttttttttttttt结论ttttt调查区内楠属植物的种群年龄结构相比润楠属更合理，呈稳定型，而润楠属植物种群年龄结构为衰退型。tttt

Size and age structure of conifer forests

tttttPurposetttttIn order to investigate the distribution, population structure and community characteristics of wild Phoebe resources in Xingshan County, Hubei Province.ttttttttttttttttttMethodtttttThe field survey was conducted in Nanyang Town, Gufu Town and Xiakou Town, Xingshan County, and the habitat conditions and community characteristics were recorded.tttttttttttttResulttttttThere are 9 species and 274 strains of Phoebe in Xingshan County, including 4 species of Phoebe and 5 species of Machilus. In the investigation, M. multinervia and M. pauhoi are new distribution records in Xingshan County, which had not been recorded before; these Phoebes were wildly distributed in shady slope and the slope was between 36°−40°, and at an altitude of around 680 m. There are 68 species of vascular plants in thePhoebe plant community belonging to 34 families and 58 genera, with the most species of Lauraceae.ttttttttttttttttttConclusiontttttThe age structure of Phoebe population which is stable, is more reasonable than that of Machilus in the survey area, and the age structure of Machilus population belongs to recession type.ttttttttt