大明松4个分布区种质资源调查

Investigation of Germplasm Resources in Four Distribution Areas of Pinus taiwanensis var. damingshanensis

大明松(Pinus taiwanensis var.damingshanensis)是分布在广西、贵州高山地区的特有松类。本研究对4个大明松群体开展调查,分析黔桂两省区大明松的种质资源分布特征,为更为有效的保护利用大明松种质资源提供理论依据。结果表明,大明松在广西、贵州两省呈散生分布。分布范围为23°30′11″~29°08′22″N,107°35′04″~110°33′10″E;海拔1134~2031m。大明松与马尾松是垂直方向的替代种。分析径级结构发现,4个种源均表现为异龄结构。不同种源的大明松群体因自然条件、人为干扰等因素,龄级结构存在差异。

Pinus taiwanensis var. damingshanensis is a special pine species distributed in mountains of Guangxi and Guizhou. The research on population of Pinus taiwanensis var. damingshanensis in four nature reserves was carried out in Guangxi and Guizhou to investigate distribution characteristics of germplasm resources of P. taiwanensis var. damingshanensis. It provides theoretical basis for more efficient protection and utilization of P. taiwanensis var. damingshanensis germplasm resources. Results showed that distribution of P. taiwanensis var. damingshanensis was scattered in Guangxi and Guizhou provinces. The distribution ranges from 23°30′11″ to 29°08′22″ in the north latitude and from 107°35′04″ to 110°33′10″ in the east longitude, and the altitude ranges from 1 134 to 2 031 meter. P. taiwanensis var. damingshanensis and Pinus massoniana were alternative species in vertical direction. Diameter structure analysis showed that all the four provenances showed uneven-age structure. The age structure of P. taiwanensis var. damingshanensis population from different provenances was different due to natural conditions and human disturbance.