关键词: 紫果云杉, 径向生长, 树轮年代学, 气候变化

Abstract: Picea purpuea is a major forest type in Wanglang National Nature Reserve.10 round sample plots whose radii were 8 m were set up to core tree-rings for dendrochronology study in its mainly distributed virgin forest.The results showed that a release event occurred more than once in most samples.Besides, tree-ring width chronologies including RES and STD were established by ARSTAN.The results of correlation analysis between RES chronology and climatic factors showed that temperature in previous July, August and current June, October was significantly correlated with the radial growth of Picea purpuea.The precipitation in previous December had a negative correlation with the radial growth of Picea purpuea.However, temperature was the major climatic factor influencing tree-ring growth.The relationship was verified by single year analysis.By doing dendrochronology study, we can learn about the growth of Picea purpuea in this area and understand the responding mechanism of tree growth to climate change scientifically, which can provide fundamental basis for predicting the effects of climate change on tree growth, distribution and conservation.

Key words: Picea purpuea, radial growth, dendrochronology, climate change