蓝果树是重要的乡土彩叶树种之一。为全面了解其种群数量时空动态变化规律,采用空间代时间法和匀滑技术编制种群静态生命表。结果表明蓝果树种群径级结构处于稳定状态。死亡率和损失率2个死亡高峰分别出现在第3,4和8龄级,存活曲线属于Deevey-Ⅱ型。生存分析4个函数曲线表明,蓝果树种群具有前期衰退,中后期稳定的特点。该研究可为蓝果树的经营管理和种群未来动态预测提供参考。
To comprehensively understand the variation of Nyssa sinensis population in Sanming City,the space time method and smoothing technique were used in life table analysis.Results showed that diameter at breast height (DBH)structure of N.sinensis population is at temporal stability.The peak of mortality rate and vanishing rate both appeared at the age of 3-4 and 8 years,respectively.The survival curve can be described by Deevey-Ⅱtype.Four function curve of survival exhibited that N.sinensis population decreased at young stage and grew stably at mature stage and old stage.The results can provide a scientific basis for the management of N.sinensis population.
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