巴山榧树(Torreya fargesii)资源及其保护

在查阅相关文献资料和标本采集记录的基础上,采用实地调查和走访调查相结合的方法,对巴山榧树(Torreya fargesii)资源进行调查研究。结果表明:巴山榧树地理分布较广,间断分布于重庆、四川、贵州、陕西、湖北、湖南、安徽、河南、甘肃等海拔在800～2 700 m的亚热带山区,散生于针阔叶混交林、常绿落叶阔叶混交林、常绿阔叶林、灌丛及沟谷地带,湖北省为巴山榧树分布最为密集的地区。巴山榧树种群数量较多,但各种群分布区域狭窄,种群密度小,开花结实率低,幼苗极少,种群自然更新能力差。应加强巴山榧树种质资源的保护和人工繁育工作。

Resources and Conservation of Torreya fargesii

A survey of the resources of Torreya fargesii was conducted based on the relevant literature and data,herbarium specimen records,and a lot of field work.Results show a wide range of natural distribution of T.fargesii,scattered in coniferous and broad-leaved forests,mixed evergreen and deciduous broad-leaved forests,evergreen broad-leaved forests,hillside thickets and ravine forests,or disjuncted in subtropical mountainous areas of Chongqing,Sichuan,Guizhou,Shaanxi,Hubei,Hunan,Anhui,Henan and Gansu at altitudes of 800-2 700 m.The resource of T.fargesii is the most enriched in Hubei Province.In spite of more abundant geographical distribution areas of T.fargesii,most populations maintain a narrow distribution with very small population density,and low seedling recruitment because of low rates of flowering and seed setting,which suggests that the germplasm resource conservation and artificial propagation are necessary to T.fargesii.