植物生态学报 ›› 2024, Vol. 48 ›› Issue (8): 988-1000.DOI: 10.17521/cjpe.2023.0206  cstr: 32100.14.cjpe.2023.0206

• 研究论文 • 上一篇    下一篇

油松早晚材径向生长对气候因子的响应

史倩1, 同小娟1,*(), 许玲玲2,3, 孟平2,3, 于裴洋1, 李俊4, 杨铭鑫1   

  1. 1北京林业大学生态与自然保护学院, 北京 100083
    2中国林业科学研究院林业研究所, 北京 100091
    3河南小浪底森林生态系统国家野外科学观测研究站, 河南济源 454650
    4中国科学院地理科学与资源研究所陆地水循环及地表过程重点实验室, 北京 100101
  • 收稿日期:2023-07-18 接受日期:2024-01-16 出版日期:2024-08-20 发布日期:2024-01-22
  • 通讯作者: *同小娟(tongxj@bjfu.edu.cn)
  • 基金资助:
    国家重点研发计划(2020YFA0608101);国家自然科学基金(32271875);国家自然科学基金(31872703)

Response of radial growth of early and late wood of planted Pinus tabuliformis to climate variables

SHI Qian1, TONG Xiao-Juan1,*(), XU Ling-Ling2,3, MENG Ping2,3, YU Pei-Yang1, LI Jun4, YANG Ming-Xin1   

  1. 1School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
    2Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
    3Henan Xiaolangdi Forest Ecosystem National Observation and Research Station, Jiyuan, Henan 454650, China
    4Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2023-07-18 Accepted:2024-01-16 Online:2024-08-20 Published:2024-01-22
  • Contact: *TONG Xiao-Juan(tongxj@bjfu.edu.cn)
  • Supported by:
    National Key R&D Program of China(2020YFA0608101);National Natural Science Foundation of China(32271875);National Natural Science Foundation of China(31872703)

摘要:

全球变暖背景下, 油松(Pinus tabuliformis)人工林生态系统对气候变化响应更为敏感, 但目前对于气候变化下油松早材和晚材的径向生长还不完全了解。研究油松早材和晚材径向生长对气候变化的响应, 对预测人工林生产力与植被动态具有重要意义。该研究选取华北和西北地区5个油松人工林, 基于树木年代学方法构建油松树木年轮标准年表, 分析了气候因子对油松径向生长的影响。结果表明, 1980-2020年间研究区气温呈显著上升趋势, 区域气候向暖干化发展。康乐(KL)、天水(TS)、灵寿(LS)油松树轮宽度高于旬邑(XY)和淳化(CH), 且TS、KL、LS油松的整轮和早材树轮宽度下降更为平缓。油松的早材宽度与上年9月、当年生长季前降水量呈正相关关系。而晚材宽度则大都与气温正相关。在LS、CH、TS、KL, 气温对晚材宽度变化的相对影响较早材分别上升了21.89%、8.63%、3.31%和7.25%。因此, 与早材相比, 晚材对气温变化更为敏感, 并受到早春季节干旱的限制。综上所述, 该研究利用早材和晚材径向生长对气候变化的响应分离了油松人工林生长季不同时段的气候信号, 早材径向生长主要反映了生长季早期的降水信号, 晚材径向生长主要反映了生长季后期的温度信号。在今后的预测模型中考虑这一差异性影响将有助于提高区域气候重建的准确性。

关键词: 油松, 早材, 晚材, 气候变化, 相对影响

Abstract:

Aims Under the background of global warming, the plantation of Pinus tabuliformis is highly sensitive to climate change. However, the impacts of climate change on the radial growth of the earlywood and latewood are still less understood. Therefore, it is important for predicting the productivity and vegetation dynamics of the plantations to understand the responses of radial growth of earlywood and latewood to climate change.

Methods Based on dendrochronology, we established the standard chronology of earlywood and latewood tree rings from five sampling sites in the northern and northwest China. Furthermore, we analyzed the relationship between annual ring width index and climate variables, and investigated the relative influence of climate variables on the growth of P. tabuliformis.

Important findings Air temperature showed a significant increasing trend from 1980 to 2020, and regional climate was becoming warmer and drier. The ring widths of P. tabuliformis at Kangle (KL), Tianshui (TS) and Lingshou (LS) were higher than those at Xunyi (XY) and Chunhua (CH). Compared with CH and XY, the total ring width and earlywood width at TS, KL and LS showed a smaller decreased trend. The chronology of earlywood of P. tabuliformis showed positive correlations with precipitation in last September and during the pre-growing season of current year. The latewood largely showed a positive correlation with air temperature throughout the whole year. The radical growth in P. tabuliformis was positively correlated with averaged air temperature and maximum air temperature from March to April, especially in LS, KL and TS. It is indicated that the radial growth of earlywood and latewood was significantly correlated with climate factors during the growing season. The responses of radial growth to climate variables between earlywood and latewood were different. The relative influence of air temperature on the width change of the latewood increased by 21.89%, 8.63%, 3.31% and 7.25% compared to the earlywood in LS, CH, TS and KL, respectively. The latewood was more sensitive to air temperature than earlywood. Therefore, considering the difference in response to climate change between early and late wood chronology is helpful for improving the quality of regional climate reconstruction in the future.

Key words: Pinus tabuliformis, earlywood, latewood, climate change, relative influence