摘要
在重庆缙云山采集了２００多个四川大头茶（Ｇｏｒｄｏｎｉａａｃｕｍｉｎａｔａ）年轮样品，建立了该树木的年轮指数年表，并对照有关气象资料应用功率谱方法对其年轮生长动态进行了分析研究。结果表明，四川大头茶年轮年表与重庆地区年降水量密切相关。其年轮的功率谱密度值随波数分布不均匀。年轮宽度生长变异的周期为２年、１１年、２２年左右。分析四川大头茶年轮生长变异的功率谱，可以探讨。
More than 200 growth ring samples of Gordonia acuminata were collected from Mt. Jinyun to study the environmental influence in Chongqing district on the growth of this tree. Its chronological table was set up and, based on the meteorological information and power spectrum theory, we analyzed the growth dynamics of Gordonia acuminata. The results indicated that the chronological table had a significant positive correlation with the precipitation in Chongqing district, and the distribution of power spectrum was not even with its wave number. It was found out that the growth cycle of Gordonia acuminata growth ring was about two, eleven and twenty two years. From the power spectrum analysis of the growth ring dynamics of Gordonia acuminata, we could study the changing tendency of its environmental precipitation.
出处
《西南农业大学学报（自然科学版）》
CSCD
1997年第1期25-28,共4页
Journal of Southwest Agricultural University
基金
国家自然科学基金
关键词
四川大头茶
年轮
气候
生长
Gordonia acuminata
annual growth ring
climates
power spectrum
period
