摘要
为探讨暖温带半湿润区不同生长阶段油松径向生长对气候变化的响应,以山西灵空山国家级自然保护区的油松人工林为研究对象,建立该地区1951–2018年树轮标准化年表,采用相关分析法对树轮生长动态及其与气候因子的关系进行分析。结果表明:灵空山地区油松树木年表包含了丰富且敏感的气候信息,适合进行树木年轮学分析,不同生长阶段油松的径向生长对气候响应程度不同,敏感性表现为过熟期(0.354)>幼龄期(0.338)>中龄期(0.324)>近熟期(0.308)>成熟期(0.297)。信噪比、所有序列平均相关系数、平均指数等参数中,过熟期均大于其它龄期,分别达到了23.803、0.515、0.994,说明过熟期更适合用于进行年轮气候学研究。响应函数分析表明,油松幼龄期和中龄期年表对各月气候因子均较敏感,而近熟期、成熟期以及过熟期年表对降水更加敏感并表现出显著的相关关系,且径向生长与降水的相关系数均大于幼龄期和中龄期。灵空山油松年轮宽度与气候因子的响应模式受生长阶段的影响,温度和降水是影响油松幼龄期和中龄期径向生长的主要因子,降水则是近熟期、成熟期以及过熟期木质部生长的主要制约因子。
In order to explore the response of Pinus tabulaeformis radial growth to climate change at different growth stages in the warm temperate subhumid zone,this paper conducted in the Lingkong Mountain of Shanxi Province,established the tree-ring standardized chronology from 1951 to 2018 in the area,and used correlation analysis to analyze tree-ring growth dynamics and its relationship with climate factors.The results showed that the tree rings of Pinus tabulaeformis contained rich and sensitive climate information,which was suitable for tree ring analysis.The response of the radial growth of Pinus tabulaeformis in different forest ages to climate was not same,and the sensitivity was in the order of over mature forest(0.354),young forest(0.338),middle age forest(0.324),near mature forest(0.308)and mature forest(0.297).The signal-to-noise ratio and the correlation coefficients of average phase of all sequences and average index of the over mature forest were larger than those of other age groups,reaching 23.803,0.515 and 0.994,respectively.It is indicated that over mature forest was more suitable for studying ring climatology.The response function analysis showed that the young and medium forests were all sensitive to the climate factors of each month,while the near mature,mature and over-mature forests of Pinus tabulaeformis were more sensitive to precipitation and showed a significant correlation,and the correlation coefficient between radial growth and precipitation was greater than that between the young forest and the medium forest.The response function analysis showed that the radial growth of the young-aged forest has a significant negative correlation with maximum temperature and temperature amplitude in June,a significant positive correlation with minimum temperature in February and October,a significant positive correlation with precipitation in August,a significant positive correlation with the radial growth of middle-aged forest and the average lowest temperature in July,and a significant positive correlation with the temperature amplitude in January.The radial growth of near mature forest was positively correlated with precipitation in October of last year,but negatively correlated with precipitation in October of that year,and the correlation coefficient between the radial growth of Pinus tabulaeformis and precipitation in the later growth stage was greater than that of young-aged forest and middle-aged forest.The radial growth of mature forest was positively correlated with precipitation in July and August.The radial growth of over mature forest was positively correlated with precipitation in November of last year,and it had a significant negative correlation with precipitation in January and May of the same year with the correlation coefficients more than 0.7.The response of the ring width to climate variables of Pinus tabulaeformis in the Lingkong mountain was affected by age factors.Temperature and precipitation were the main factors affecting the radial growth of young and middle aged forests,while precipitation was the main factor restricting the xylem growth of near mature,mature and over mature forests.
作者
许玲玲
同小娟
张劲松
孟平
王鑫
李俊
XU Ling-ling;TONG Xiao-juan;ZHANG Jin-song;MENG Ping;WANG Xin;LI Jun(College of Forestry,Beijing Forestry University,Beijing 100083,China;Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration,Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091;Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101)
出处
《中国农业气象》
CSCD
北大核心
2020年第6期357-367,共11页
Chinese Journal of Agrometeorology
基金
国家自然科学基金项目(31872703
31570617)。
关键词
油松
径向生长
树轮宽度年表
气候变化
不同生长阶段
Pinus tabulaeformis
Radial growth
Tree-ring width chronology
Rlimatic factors
Different growth stages
