文献类型：期刊文献

中文题名：不同种源杉木树轮α纤维素δ^13C对年气候因子的响应

英文题名：Responses of δ^13C Value of Cellulose in Tree Ring of Chinese Fir Provenances to Annual Climate Factors

作者：刘小英[1] 段爱国[1,2] 张建国[1,2] 张雄清[1] 朱安明[3]

第一作者：刘小英

机构：[1]中国林业科学研究院林业研究所,国家林业和草原局林木培育重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,江苏南京210000;[3]中国林业科学研究院林业科技信息研究所,北京100091

年份：2020

卷号：33

期号：2

起止页码：9-18

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：江西省林业厅林业科技创新专项“杉木高世代育种亲本选择和新品系创制(201702)”;国家自然科学基金面上项目“杉木不同地理种源树轮对气候变化的响应(31370629)”;国家“十二五”科技计划课题“杉木速生丰产林定向培育技术研究(2015BAD09B0101)”;国家“十三五”重点研发计划课题“杉木速生材高效培育技术研究(2016YFD0600302)”。

语种：中文

中文关键词：杉木;种源;树轮;α纤维素;δ^13C;气候因子

外文关键词：Cunninghamia lancealata;provenance;tree-ring;α-cellulose;δ^13C value;climatic factor

分类号：S716.3

摘要：[目的]通过对不同地理种源杉木α纤维素中的稳定碳同位素(δ^13C)与气候因子的相关性分析,筛选出影响杉木树轮δ^13C的主导气候因子,解释不同种源差异性响应,为种源层面上区域杉木的培育提供理论参考。[方法]以广西柳州的杉木试验林场的30个种源为研究材料,提取并测量α纤维素中δ^13C,利用相关分析和逐步回归分析方法,对杉木树轮δ^13C与当年、前1年、前2年的降水、平均温度、最低气温、最高气温、平均相对湿度、最小相对湿度、日照时数及湿润度指数进行分析。[结果]不同种源杉木(1987-2013)树轮δ^13C值的变幅为-20.997‰^-25.910‰,表现出较强的一阶自相关,相关系数为0.181~0.866。大部分种源杉木树轮的δ^13C与平均温度、最高气温、最低气温呈显著正相关(p<0.05),与日照时数呈不显著正相关,与平均相对湿度、最小相对湿度呈极显著负相关(p<0.01),而与降水及湿润度指数的相关性不统一。逐步回归分析结果发现,30个杉木种源中有26个种源与当年最小相对湿度呈线性关系。[结论]最小相对湿度是影响不同种源杉木树轮α纤维素中δ^13C的主导气候因子,而对降水的依赖性很小。杉木不同种源树轮δ^13C对气候因子的响应存在明显的滞后效应。研究有效的填补了种源层面上树轮稳定碳同位素对气候响应研究的不足,也为杉木培育及经营管理提供了参考。
[Objective] Trying to explain the response of Chinese fir(Cunninghamia lanceolata) provenances to various climatic factors by analyzing the correlation between stable carbon isotope value in the cellulose of Chinese fir and the climatic factors. [Method] The δ^13C value of cellulose of 30 provenances was extracted and measured from the experimental forest farm of Chinese fir in Liuzhou, Guangxi. The δ^13C value, the tree ring, the precipitation, the mean temperature, the minimum air temperature, the maximum air temperature, the mean relative humidity, the minimum relative humidity, the sunshine hours and the humidity index in the current year, the first year and the first two years were analyzed. [Result] The variation range of δ^13C value of tree ring of different Chinese fir provenances during 1987-2013 was-20.997‰--25.910‰, showing strong first-order autocorrelation, the correlation coefficient was 0.181-0.866. The δ^13C value of tree ring of different Chinese fir provenances was significantly and positively correlated with the mean temperature, the maximum temperature and the minimum temperature(p<0.05), and positively correlated with sunshine hours. There was a significantly negative correlation between the δ^13C value and the mean and minimum relative humidity(p<0.01), but no obvious correlation with the precipitation and wetness index. The results of stepwise regression analysis showed that 26 out of the 30 Chinese fir provenances had linear relationship with the minimum relative humidity of the current year. [Conclusion] The minimum relative humidity is the dominant climatic factor affecting the δ^13C value of cellulose in the tree ring of Chinese fir provenances, which has little dependence on the precipitation. The response of δ^13C in Chinese fir tree ring to climate factors has obvious lag effect.The study may provide reference for the cultivation and management of Chinese fir.