文献类型：期刊文献

中文题名：河南民权与陕西白水刺槐径向生长与水分利用效率对气候响应的差异

英文题名：Differences in the Response of Radial Growth and Intrinsic Water Use Efficiency of Robinia pseudoacacia to Climatic Factors in Minquan of He’nan Province and Baishui of Shaanxi Province

作者：周佳[1,2,3] 孟平[1,2,3] 张劲松[1,2,3] 管崇帆[1,2,3] 孙守家[1,2,3]

第一作者：周佳

机构：[1]中国林业科学研究院林业研究所,北京100091;[2]国家林业和草原局林木培育重点实验室,北京100091;[3]南京林业大学南方现代林业协同创新中心,江苏南京210037

年份：2021

卷号：34

期号：6

起止页码：1-8

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2020】；CSCD:【CSCD2021_2022】；

基金：国家重点研发计划项目课题(2020YFA0608101);国家自然科学基金面上项目(32171871);南京林业大学南方现代林业协同创新中心项目资助。

语种：中文

中文关键词：刺槐;树轮;径向生长;稳定碳同位素;内在水分利用效率

外文关键词：Robinia pseudoacacia;tree rings;radial growth;stable carbon isotopes;intrinsic water use efficiency

分类号：S792.27

摘要：[目的]分析不同地区刺槐径向生长、内在水分利用效率(WUE_(i))对气候因子响应的差异,确定影响其生长和水分利用的主导因子,为我国刺槐人工林在气候变化背景下的管理经营提供参考。[方法]在河南民权(MQ)与陕西白水(BS)两地,利用树木年代学方法建立刺槐轮宽年表,测定树轮稳定碳同位素值(δ^(13)C),计算刺槐年际间的WUE_(i),结合气象资料分析刺槐径向生长与WUE_(i)对气候响应的差异。[结果]两地刺槐林龄相似且民权刺槐轮宽随着林龄的增加呈线性下降趋势,白水呈"升-降"曲线变化。两地刺槐的胸高断面积增量(BAI)变化趋势相似,均呈"升-降"的曲线。民权刺槐的δ^(13)C和WUE_(i)均低于白水刺槐。Pearson相关结果显示:月尺度上,两地刺槐标准化年表(STD)指数主要与夏季降水和干旱指数(SPEI)显著正相关(P<0.05),且白水刺槐与上年11月平均降水、SPEI显著负相关(P<0.05);民权刺槐WUE_(i)与当年3月和8月的平均温度、最高温度显著正相关(P<0.05),白水刺槐WUE_(i)与当年3、4月、上年及当年6、7月平均温度、最高温度和最低温度显著正相关(P<0.05)。路径分析模型表明,年尺度上,白水县刺槐STD指数与平均降水、平均温度存在显著正效应(P<0.05),而民权刺槐对气候因子响应不显著;两地刺槐WUE_(i)均与平均温度存在显著正效应(P<0.05)。[结论]平均降水是两地刺槐径向生长的主导因子,白水刺槐生长对平均降水的敏感性高于民权刺槐,平均温度是两地刺槐WUE_(i)的主导因子,白水刺槐WUE_(i)较民权刺槐对温度变化更敏感。
[Objective]To analyze the response of radial growth and intrinsic water use efficiency(WUE_(i))of Robinia pseudoacacia to climate factors at different locations,and to determine the dominant factors affecting the growth and water use mechanism,so as to provide reference for the management of R.pseudoacacia plantations in China under climate change.[Method]The ring width chronologies were established in Minquan(MQ)of He’nan Province and Baishui(BS)of Shaanxi Province.The stable carbon isotopic composition(δ^(13)C)of tree ring was measured to calculate the WUE_(i).The differences in the response of R.pseudoacacia to climatic variation were analyzed with meteorological data.[Result]The plantations at the two locations were in similar age.The tree-ring width at BS presented a trend of initially increasing and thereafter decreasing with the increase of tree age,whereas at MQ,the tree-ring width showed a linear decreasing trend with tree age increase.The trends of basal area increment(BAI)of R.pseudoacacia at the two locations were similar,presenting a trend of initially increasing and thereafter decreasing with the increase of tree age.Theδ^(13)C value and WUE_(i) of the trees in MQ were lower than those of BS.The Pearson correlation results showed that on a monthly scale,the STD index of R.pseudoacacia in the two locations was mainly positively correlated with the summer precipitation and drought index(SPEI)(P<0.05),and the R.pseudoacacia in BS was significantly negatively correlated with the average precipitation and SPEI in November of the previous year(P<0.05).The WUE_(i) of trees in MQ was significantly positively correlated with the average temperature and maximum temperature in March and August(P<0.05),while that of trees in BS was significantly positively correlated with the average temperature,maximum temperature and minimum temperature from March to April of the current year,and June to July of the previous and current year(P<0.05).The path analysis model showed that on the annual scale,the STD index of R.pseudoacacia in BS had a significant positive effect on the average precipitation and average temperature(P<0.05),while the R.pseudoacacia in MQ had no significant response to climate factors.The annual average temperature had significantly positive effect on WUE_(i) of trees at both the locations(P<0.05).[Conclusion]The average precipitation is the dominant factor influencing the radial growth of R.pseudoacacia at both the locations,and the sensitivity of growth of trees in BS is higher than that of trees in MQ.The average temperature is the dominant factor influencing WUE_(i) at the two locations,and the WUE_(i) of trees in BS is more sensitive to the temperature than that of trees in MQ.