森林与环境学报2025，Vol.45Issue(4)：395-402,8.DOI:10.13324/j.cnki.jfcf.202412032
藏东南不同海拔高山松径向生长对气候变化的响应差异
Differences in radial growth response to climate change of Pinus densata at different altitudes in southeastern Xizang
摘要
Abstract
This study aims to investigate the influences of climatic factors on the radial growth of Pinus densata at different altitudes in southeastern Xizang.A chronology of tree-ring width was established for the P.densata growing at low,medium,and high altitudes in Linzhi,southeastern Xizang to analyze its correlation with monthly climatic factors and the adaptability to drought years.The results showed that the radial growth of low-altitude P.densata in the study area was positively correlated with the maximum air temperatures in July of the previous year and June of the current year and the precipitation in November of the previous year(P<0.05),while it was negatively correlated with the average and maximum air temperatures in November of the previous year(P<0.05).The radial growth of medium-altitude P.densata was positively correlated with the minimum temperatures in September of the previous year and January of the current year(P<0.05)and the precipitation in January and April-May of the current year(P<0.05),while it was negatively correlated with the maximum temperature in April-May of the current year(P<0.05).The radial growth of high-altitude P.densata was positively correlated with the precipitation in September of the previous year and May of the current year and the maximum temperature in July of the current year(P<0.05).The radial growth of low-and medium-altitude P.densata showed enhanced sensitivity to temperatures and stable sensitivity to precipitation during the growing season,and that of high-altitude P.densata demonstrated weakened sensitivity to temperatures.The medium-and high-altitude P.densata demonstrated higher resistance to drought and lower resilience than low-altitude P.densata.P.densata at all the three altitudes showcased strong adaptation to drought.关键词
藏东南/高山松/海拔/径向生长/气候/干旱Key words
southeastern Xizang/Pinus densata/altitude/radial growth/climate/drought分类
林学引用本文复制引用
蔡苗,李雅,卢杰,李江荣..藏东南不同海拔高山松径向生长对气候变化的响应差异[J].森林与环境学报,2025,45(4):395-402,8.基金项目
西藏农牧学院人才队伍建设项目"藏东南森林生态系统碳源/汇特征及碳库影响因素研究"(XZNMXYRCDWJS-2024-05) （XZNMXYRCDWJS-2024-05）
西藏高原森林生态教育部重点实验室研究生创新计划项目"色季拉高山松径向生长对气候变化的分异响应"(XZA-JYBSYS-2023-17) （XZA-JYBSYS-2023-17）
西藏自治区科技计划项目"藏东南高山松长期生态学观测研究-西藏林芝高山森林生态系统国家野外科学观测研究站(科技创新基地)"(XZ202301JD0001G). （科技创新基地）
