井冈山天然大果马蹄荷种群的动态变化

The population dynamics of natural Exbucklandia tonkinensis Steenis in Jinggang Mountain

应用离散富里叶变换研究井冈山天然大果马蹄荷(ExbucklandiatonkinensisSteenis)的种群动态规律,结果表明:大果马蹄荷种群动态存在着周期波动规律,大周期为140年,中周期70年,小周期28～35年,与大果马蹄荷个体生长的周期波动一致。天然大果马蹄荷的世代划分以70年为宜,人工林以25年为宜。该研究结果可为天然林的管理和持续利用提供科学依据。

The population analysis of natural \%Exbucklandia tonkinensis \%Steenis of Jinggang Mountain by Fourier Translation showed that there is a marked regularity of periodic fluctuations in the process of natural regeneration as follows: the long periodic fluctuation is 140 years, the middle one is 70 years and the short one is 28～35 years. It is discovered that the periodic fluctuation of the annual growth of individual tree is coincident with the natural regeneration process. However, it also indicated that the generation of \%Exbucklandia tonkinensis \%Steenis is 70 years in natural community and 25 years in cultured community according to the analyses above. It will be effective for sustainable utilization and management of natural forests from the result.