对川西地区岷江柏(Cupressus chengiana S.Y.Hu)4个地理种群进行了调查,编制种群静态生命表并进行生存分析。结果表明,岷江柏4个地理种群的存活曲线都属于Deevey Ⅲ型,死亡率与所对应的消失率变化趋势一致,并存在2个高峰。种群生存率均单调下降,累计死亡率单调上升,下降或上升的速度以理县种群最快,马尔康种群最慢;死亡率密度在幼苗期重合,并达到最大(0.05),但从幼苗级向幼树级过渡时迅速下降到0.01以下;种群的危险率曲线与其死亡率变化趋势一致,其中马尔康种群波动最小,小金种群波动最大。综合分析表明,岷江柏4个种群均有较强的自然更新能力,属增长型种群,但人为砍伐是其最重要的干扰因素。

Age structures of Cupressus chengiana S. Y. Hu populations in 4 geographical areas of Sichuan Province were investigated and static specific life tables were constructed. The results showed that all the survival curves of 4 populations belong to Deevey-Ⅲ type. The mortality rate displayed similar change dynamics to lose rate. The mortality rate had 2 distinct peaks which are 1- 10 a and 110-200 a, respectively. Mortality rates of 4 populations increased all along and survival rates decreased all the time, and the increase or decrease velocity of 4 population in different areas was ranked as follows: Lixian, Jinchuan, Xiaojin, Maerkang.All 4 populations had the maximum mortality rate density(about 0.05)at young age. After that, the mortality ratio density decreased dramatically and keptbelow0.01.The hazard rate showed the similar change dynamic to mortality rate and the fluctuation tendency of the two curves was ranked as Xiaojin, Lixian, Jinchuan, Maerkang. All the results above mentioned indicated that the natural regenerative ability of 4 populations is strong, each population showed an increasing population type. Logging is the most important factor to affect the stability of the C. chengiana population and should be prohibited strictly.