中国南北过渡带油松径向生长对气候因子的响应研究——以鸡公山国家级自然保护区为例  

Response of Pinus tabuliformis radial growth to climate factors in the north-south transition zone of China:Case study in the Jigong Mountain

作　　者：韦晓旭 彭剑峰[1,2,3] 彭猛 李轩 崔佳月 李金宽 魏亚飞 Wei Xiaoxu;Peng Jianfeng;Peng Meng;Li Xuan;Cui Jiayue;Li Jinkuan;Wei Yafei(College of Geography and Environmental Science,Henan University,Kaifeng 475004,Henan,China;Key Laboratory of Earth System Observation and Simulation of Henan Province,Kaifeng 475004,Henan,China;National Demonstration Center for Environmental and Planning,Kaifeng 475004,Henan,China)

机构地区：[1]河南大学地理与环境学院,河南开封475004 [2]河南省地球系统观测与模拟重点实验室,河南开封475004 [3]河南大学环境与规划国家级实验教学示范中心,河南开封475004

出　　处：《地理科学》2024年第9期1643-1652,共10页Scientia Geographica Sinica

基　　金：国家自然科学基金项目(42077417,41671042)资助。

摘　　要：本研究以河南省信阳市鸡公山自然保护区的油松林为研究对象,利用树木年轮学方法建立了油松径向生长宽度年表,其特征值表明,油松标准年表的质量较高,包含较多的气候信息,能反映气候变化对树木生长的影响。标准年表与鸡公山南北气象站(麻城和信阳站)的气象因子相关结果发现:油松生长与鸡公山南侧麻城气象站几乎与所有月份气温都呈负相关,与当年5—7月气温(6月的平均气温,5、6月平均最高气温和6、7月平均最低温度)呈显著负相关,而与几乎所有月份相对湿度都呈正相关,表明过渡带南侧高温带来的土壤水分胁迫对油松生长主要起着限制作用,南侧春末夏初4—6月相对湿度是油松生长的限制因子;鸡公山北侧信阳气象站生长季及生长季后期8—9月气温(8月平均气温、8、9月平均最低气温)对油松生长有明显的促进作用,上年7—8月相对湿度是油松生长的限制因子,北侧生长季后期9月降水对油松生长的促进作用具有滞后效应。滑动相关分析显示出,近几年油松生长对过渡带北侧信阳气象站8—9月平均气温的正响应趋势增强;在气候变暖的情景下,受到高温抑制(亚热带的麻城气温负相关),油松生长南界可能会向北移动。油松响应气候变暖的生长动态研究旨在为过渡带森林管理与更新提供基础数据支持。In order to study the response of tree growth to north-south climate change in the subtropical and warm temperate climate transition zone,taking Pinus tabuliformis forest of the Jigong Mountain Nature Reserve in Xinyang City,Henan Province as the research object,the radial growth width chronology of it is established using the tree ring method.The characteristic values of chronology show that the standard chronology of high quality containing many climate information can reflect the impact of climate change on tree growth.The analyses of the standard chronology and meteorological factors of the north and south weather station of the Jigong Mountain find that:The growth of Pinus tabuliformis is not only negatively correlated with the temperature,but also positively correlated with the relative humidity in almost all months,significantly with May-July temperature(mean temperature in June,mean maximum temperature in May and June,and mean minimum temperature in June and July)of the Macheng meteorological station on the south side of the Jigong Mountain,which shows that the soil water stress mainly limits the growth,caused by high temperature in the south side of the transition zone;and the April-June(late spring and early summer)relative humidity is the limiting factor for the growth of Pinus tabulaeformis on the south side of the Jigong Mountain.However,the August-September temperature(the mean temperature in August and the mean minimum temperature in August and September)has an obvious effect on promoting the growth of Pinus tabulaeformis,and July-August relative humidity of last year is the limiting factor of Pinus tabulaeformis’growth on the north side of the Jigong Mountain.The precipitation in September(the late growing season)had a lag effect on the growth of Pinus tabulaeformis.In the moving correlation analysis,there is a enhanced trend positively responsing the August-September mean temperature of Xinyang meteorological station on the north side of the transition zone in recent years.Therefore,under the c

关 键 词：鸡公山 油松 树轮宽度 气候响应 南北过渡带 

分 类 号：P936[天文地球—自然地理学]