摘要
为探讨杉木不同径向生长指标对气候因子的响应,了解气候变化背景下杉木径向生长敏感性与适应性的差别,采用树轮气候相关分析方法,以60年生杉木人工林为研究对象,通过测定杉木整轮宽度、早材宽度和晚材宽度,并利用杉木树轮自回归年表(ARS)分析主要气候因子(月份水平温度和降水)对杉木径向生长的影响.结果表明:杉木径向生长均受到温度和降水的显著影响,早材宽度与当年2月平均温度呈显著负相关(P<0.05),晚材宽度与当年10月平均降水量呈极显著正相关(P<0.01).冗余分析量化了气候因子对杉木径向生长的影响,当年7月平均最高温度和当年10月平均降水量是限制该区域杉木径向生长的关键气候因子.滑动相关分析表明,气候因子变化在短时间尺度上对杉木径向生长的影响存在差异,其中杉木径向生长对当年9月最高温度的响应稳定性最强.当年10月平均降水量对晚材宽度的促进作用逐渐增强.杉木年轮生长对上一年气候的影响存在“滞后效应”,晚材生长对当年早期杉木生长气候因子的影响存在“滞后效应”.亚热带地区气候影响杉木径向生长的效应复杂,但ARS年表仍包含丰富的气候信号,研究结果对亚热带针叶树种年轮生态学、年轮气候学研究具有重要参考价值.
To assess the sensitivity and adaptability of Cunninghamia lanceolata under climate change,analysis concerning tree-ring and climate was carried out upon 60-year-old Chinese fir by measuring the widths of whole wood,early wood and late wood firstly.Then the influences of main climatic factors(average monthly temperature and precipitation)on the radial growth of Chinese fir were analyzed by autoregressive chronology(ARS).The results showed that the radial growth of Chinese fir was significantly affected by temperature and precipitation.There was a negative correlation between early wood width and average temperature in February(P<0.05),while the width of late wood was significantly positively correlated with the average precipitation in March(P<0.01).Average maximum temperature in July and precipitation in October were the key climatic factors affecting the radial growth of Chinese fir in the region.Sliding correlation analysis further revealed that the impacts of climatic factors on the radical growth of Chinese fir varied in short time scales;among them,all 3 ring-related indicators were consistently negatively correlated with the highest tempera-ture in September,and the average precipitation in October exerted an increasing promotive impact on latewood.Overall,climatic factors exerted a‘lag effect’on the radical growth of Chinese fir,for instance climatic conditions of the previous year or the beginning of the year influenced the growth of current year or the end of the year.The effect of subtropical climate was complex,thus ARS chronology contains abundant climate signals,which have important implications for studies on annual tree-ring ecology and annual climatology relating to subtropical conifers.
作者
张辉
颜耀
胡亚楠
黄智军
吴鹏飞
马祥庆
ZHANG Hui;YAN Yao;HU Yanan;HUANG Zhijun;WU Pengfei;MA Xiangqing(College of Forestry,Fujian Agriculture and Forestry University;State Forestry Administration Engineering Research Center of Chinese fir,Fuzhou,Fujian 350002,China)
出处
《福建农林大学学报(自然科学版)》
CSCD
北大核心
2020年第1期59-66,共8页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
杉木高世代良种创新与产业化工程(ZYCX-LY-2017004)
福建省科技厅重大专项(2018NZ0001-1)
福建农林大学科技创新专项基金项目(CXZX2018136)
关键词
杉木
径向生长
气候因子
整轮宽度
早材宽度
晚材宽度
Cunninghamia Lanceolata
radial growth
climatic factors
tree-ring width
earlywood width
latewood width