摘要
应用相关分析、逐步回归、数字滤波以及功率谱方法对四川缙云山四川大头茶年轮生长动态进行了分析研究，通过数学模型滤除树木本身生长的遗传因素及定年后，建立了缙云山青龙寨和香炉峰的树木年轮年表．结果表明，四川大头茶年轮中保存的信息量较大，两地点年轮年表与其生长环境重庆地区的年降水量相关密切，可以用该年表表征重庆地区的降水情况．气象因子与四川大头茶年轮宽度间的统计数学模型为：Ｙ＝－２．１９＋０．００７４７Ｊ１＋０．００６１２Ｊ２＋０．００１４０Ｊ３＋０．００３８４Ｊ４＋０．００３７１Ｊ５＋０．０７３１Ｔ１＋０．０５６４Ｔ５，年轮的功率谱密度值随波数的分布不均匀，由年轮宽度变异的功率谱周期分析揭示了树木生长环境２、１１～１２、２２年左右的降水波动周期．树木年轮表的建立与分析。
With the methods of correlation analysis,
stepwise regression, digital filtering and power spectrum, the dynamics of tree ring growth of
Gordonia acuminata in Mt. Jinyun was analysed. After the genetic factors of tree growth were
filtered by mathematical model, the chronological tables of Qinglongzhai and Xinglufeng were
constructed, which showed a significant positive correlation with the precipitation in Chongqing.
The mathematical model between tree ring growth and climatic elements was
Y=-2.19+0.00747J 1+0.00612J 2+0.00140J 3+0.00384J 4+0.00371J 5+0.00731T 1+0.0564T
5. The power spectrum density was not evenly distributed with wave number,and the power
spectrum cycle of tree ring width variation revealsed that the precipitation wave cycle of tree
growth environment was about 2, 11～12 and 22 years. The construction and analysis of the
chronological table of tree ring was one of the important ways to study the dynamics of
ecosystem and the historical change of its environment.
出处
《应用生态学报》
CAS
CSCD
1999年第2期151-154,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金
关键词
四川大头茶
年轮
气候
滤波
功率谱
Gordonia acuminata , Tree
ring, Climate, Filter, Power spectrum, Cycle
