Radial Growth Response of Pinus yunnanensis to Climate Change on Jianhu in Jianchuan,Dali
Pinus yunnanensis is an important coniferous species in Yunnan-Guizhou Plateau.Based on dendro-chronology method,the relationship between radial growth of P.yunnanensis and climate in Jianhu was studied in this paper.The residual chronology of P.yunnanensis in Jianhu was established by using the ring width data of the species.The response function was applied to study the pattern of radial growth responses of P.Yunnanensis to climate,and to explore the key climate factor affecting its growth in the area.The results showed that the radial growth of P.yunnanensis was influenced by both temperature and precipitation.The increase of temperature limit-ed the radial growth of P.yunnanensis,and the residual chronology index showed a significant negative correla-tion with July and September of the previous year and March and May of the current year.In addition,the precipi-tation had both positive and negative effects on the radial growth,showing complexity.With the increasing of cli-mate warming and the occurrence of extreme climate,the response of P.yunnanensis growth to temperature and precipitation will be more complex in Jianhu.
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