祁连山中部不同树龄及不同生长率青海云杉径向生长对气候的响应  

The Climate Response of Radial Growth of Picea crassifolia with Different Ages and Different Initial Growth Rates in the Middle of Qilian Mountains

作　　者：李卉 詹思敏 冉依林 张凌楠 刘晓宏 LI Hui;ZHAN Simin;RAN Yilin;ZHANG Lingnan;LIU Xiaohong(School of Geography and Tourism,Shaanxi Normal University,Xi′an Shaanxi 710119)

机构地区：[1]陕西师范大学地理科学与旅游学院

出　　处：《首都师范大学学报（自然科学版）》2020年第1期53-61,共9页Journal of Capital Normal University：Natural Science Edition

基　　金：国家自然科学基金青年基金项目(41801024);中国博士后科学基金面上项目(2018M640946);陕西省博士后科学基金面上项目(2018BSHEDZZ30);中央高校基本科研业务费专项资金(GK201803050,GK201801007)

摘　　要：为了研究不同年龄及不同初始生长率树木径向生长对气候因子的响应,本研究采集祁连山青海云杉(Picea crassifolia)树木年轮样芯作为样本,计算树木年龄与初始生长率,并根据两者之间的关系,将所有样芯划分为年龄组与生长率组.分别将两组样芯的单根年表与气候因子进行Pearson相关分析.研究显示两组树木均表现出与前一年8月、当年5和6月降水量及前一年8月至当年6月累积降水显著正相关,与前一年和当年6、7月的月平均温度显著负相关.年龄组的树木中,老龄树比幼龄树对于当年6月的月总降水量和前一年8月至当年6月累积降水的响应更加强烈;而生长率组的树木则表现为初始生长快的树木比初始生长慢的树木对前一年6月的月总降水量和前一年8月至当年6月累积降水有更强的响应.不同树龄及不同初始生长率的树木对当年6月平均温度的响应无明显差异.在森林经营管理中应加强对初始生长过快和树龄过大树木的管理和保护.In order to detect the relationships between the climatic factors and radial growth of trees with different ages and different initial growth rates,tree cores of Qinghai Picea crassifolia in the Qilian Mountains were collected as the samples to calculate the ages and initial growth rates of trees.Cores were divided into age group and growth rate group according to the relationships between tree ages and initial growth rates.Pearson correlation coefficients were calculated between single chronology and climate factors.Results showed that trees of two groups had the significant and positive correlation with the total precipitation in the previous August,the current May and June and that from the previous August to the current June,and the significant and negative correlation with the mean monthly temperature in the previous and the current June and July.In the age group,old trees showed stronger response to precipitation in the previous June and that from the previous August to the current June than young trees.In the growth rate group,trees with higher initial growth rates showed stronger response to precipitation in the previous June and that from the previous August to the current June than trees with lower initial growth rates.The responses of trees with different ages and initial growth rates to the mean monthly temperature in the current June were similar.We should strengthen the management and protection for trees that grow too fast and are too old in the forest management.

关 键 词：树木年轮 树龄 初始生长率 气候响应 

分 类 号：P942[天文地球—自然地理学]