基于年轮学的北京上方山古侧柏定年分析  

Dating Analysis of Ancient Platycladus orientalis Based on Chronology in Shangfangshan,Beijing

作　　者：时慧欣 王永格 王英博 巢阳 丛日晨 SHI Huixin;WANG Yongge;WANG Yingbo;CHAO Yang;CONG Richen(Beijing Academy of Landscape and Greening Sciences,Beijing 100102,China;Agricultural University of Hebei,Baoding 071000,Hebei,China)

机构地区：[1]北京市园林绿化科学研究院,北京100102 [2]河北农业大学,河北保定071000

出　　处：《西北林学院学报》2025年第1期119-125,177,共8页Journal of Northwest Forestry University

基　　金：国家林业和草原局的应急揭榜挂帅项目:野生动植物和古树名木鉴定技术及系统研发(202303)。

摘　　要：以北京上方山1938—2022年古侧柏的38株树芯为试验材料,建立年轮宽度年表,结合试验区气象数据,探讨了侧柏树龄与自身因子、气候因子之间的相关性,建立侧柏树龄与胸径、降水、温度的古侧柏树龄测定数学关系式和侧柏树龄与胸径的树龄测定单因子最优模型。结果表明:1)阶段法树龄测定模型测量各样品的树龄,各样品测量相对误差均小于单因子模型测量的对应样品树龄相对误差,因此阶段法树龄测定模型的精度高于单因子树龄测定模型,相比于单因子树龄测定模型,阶段法树龄测定模型可为本区域古树树龄测定提供参考依据;2)用4株相同采样地侧柏样本对阶段法模型进行检验,最大误差为7%;3)用四季青、红螺寺、玉泉山、颐和园古侧柏样品检验侧柏的阶段法树龄测定模型和单因子树龄测定模型,四季青古侧柏样品用阶段法树龄测定模型和单因子树龄测定模型进行测定,误差均在9%以内;红螺寺古侧柏样品用阶段法树龄测定模型测定树龄,相对误差在36%以内,用单因子树龄测定模型进行测定,误差在13%以内,阶段法树龄测定模型测定树龄相对误差高于单因子树龄测定模型,玉泉山、颐和园古侧柏样本均表现出类似规律。Taking 38 tree cores of ancient Platycladus orientalis from 1938 to 2022 in the Shangfang Mountain of Beijing as experimental materials,annual ring width chronology were established.Combined with the meteorological data of the experimental area,the correlations between the tree age and its own factors and climatic factors were discussed.The mathematical relationships between the tree age and DBH,precipitation and temperature were established,and the single factor optimal model of the tree age and DBH was established.The results showed that 1)the relative error of each sample measured by the tree age determination model based on stage method was less than that of the corresponding sample tree age measured by the single factor model.Therefore,the accuracy of the stage method model was higher than that of the single factor model.Compared with the single factor model,the stage method model can provide a reference for the determination of the age of ancient trees in this region.2)Four sample trees of P.orientalis from the same sampling site were used to test the stage method model,and the maximum error was 7%.3)Samples of P.orientalis trees were collected from four sites in Beijing,including Sijiqing,Hongluosi,Yuquanshan and Summer Palace,to conduct comparative study on stage method model and single factor model.The error of the two models was less than 9%.The relative error of the stage method model was within 36%,while the single factor tree model was within 13%.The relative error of the stage method model was higher than that of the single factor model.The samples from the rest three sites all showed similar laws.

关 键 词：年轮 古侧柏 定年分析 树龄测定 

分 类 号：S791.38[农业科学—林木遗传育种]