作　　者： ; ;

机构地区： 中山大学生命科学学院生物系

出　　处： 《热带亚热带植物学报》 1997年第1期39-44,共6页

摘　　要： 黄果厚壳桂幼苗未有准确对应于年龄的外部特征，通过对相应样地中幼苗的解析，得出了以幼苗高度和基径对年龄的二元线性回归相对准确地划分幼苗年龄的方法，它优于单纯采用高度级或基径级划分年龄结构的方法，这种方法为非毁坏性的研究现存幼苗的年龄结构提供了依据。1993年起开始对黑石顶森林群落中黄果厚壳桂种群幼苗的年龄结构和高度结构进行了定位观测研究。黑石顶黄果厚壳桂幼苗的年龄结构以2龄和3龄幼苗占优势，幼苗的年龄结构表现出一定的年度波动性，其中由3龄到4龄幼苗多度大幅度地下降。将幼苗以每10cm为一级划分高度级发现黑石顶黄果厚壳桂幼苗中有一个以高度为10—30cm幼苗占明显优势的幼苗库，这个幼苗库主要由2—4龄幼苗组成。 Age and height structures of Cryptocarya concinna seedlings in Heishidingsubtropical forest, Guangdong Province, were analyzed. The seedlings in permanent transects were tagged, measured and censused at bimonthly intervals during one year period from April 1993. Due to the seedlings having no obvious morphological characters for age identification, a method for conjecturing seedling age by dualityy linear regression with the seedling height and basal diameter of the seedlings was suggested. This method provides a tool for studying age structure of C. concinna seedlings. Seedlings of 2 and 3 years old constituted overwhelming majorty. Seedling abundance showed annual tluctuation as the number of seedlings with 3 to 4 years old decreased markedly. If the seedlings were grouped into height class based on an interval of 10 cm, it appeared that there was a seedling pool at 10- 30 cm height, which composed of 2-4 years old seedlings.

关 键 词： 黄果厚壳桂 幼苗 年龄结构 高度结构 群落

领　　域： [农业科学] [农业科学]