树木形成层活动及其影响因素研究进展  

Research progress on cambial activity of trees and the influencing factors

作　　者：王玲玲 勾晓华[1,2] 夏敬清[1,2] 王放 张芬 张军周[1,2] WANG Ling-ling;GOU Xiao-hua;XIA Jing-qing;WANG Fang;ZHANG Fen;ZHANG Jun-zhou(Ministry of Education Key Laboratory of Western China's Enoironmental Systems,College of Earth and Enwironmental Sciences,Lanzhou Uniwersity,Lanzhou 730000,China;Gansu Liancheng Forest Ecosystem Field Observation and Research Station,Lanzhou University,Lanzhou 730333,China)

机构地区：[1]兰州大学资源环境学院西部环境教育部重点实验室,兰州730000 [2]兰州大学甘肃连城森林生态系统野外科学观测研究站,兰州730333

出　　处：《应用生态学报》2021年第10期3761-3770,共10页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(42001043,41771046);甘肃省创新基地和人才计划-省野外观测研究站项目(18JR2RA011)资助。

摘　　要：树木生长是森林生态系统固碳的主要方式,树木生长过程受到气候与非气候因素的共同作用。树木径向生长长期定位监测是明确树木生长对气候变化响应的重要研究手段。本文对运用微树芯法的树木形成层活动及径向生长过程研究进行了总结。首先,综述了气候因素对树木形成层活动的影响:寒冷湿润区温度决定树木生长开始和停止,干旱半干旱区水分和温度共同决定生长开始,水分决定生长停止;生长速率和持续时间共同决定生长量,最大生长速率出现在夏至前后;短期施氮并不能影响树木径向生长动态。其次,探讨了生物因素对树木径向生长过程的调控:形成层活动开始时间因树种、树龄、竞争关系而有所差异;非结构性碳水化合物的季节动态与径向生长过程相耦合。最后,阐述了气候因素和生物因素交互作用下树木次生生长的响应机制。针对以上进展,本文提出了目前研究尚存在的问题并展望了未来的发展前景,以期为进一步的科学研究提供参考。Tree growth is the main way of carbon sequestration in forest ecosystems,which is influenced by climatic and non-climatic factors.The long-term location monitoring of cambial phenology and wood formation dynamics(xylogenesis)is an important method to clarify the responses of radial growth to climate change.Here,we reviewed studies on cambial phenology and xylogenesis by microcoring method.Firstly,we reviewed the effects of climatic factors on cambial phenology.The onset and cessation of xylogenesis were determined by temperature in cold and humid conditions.Temperature and water availability collectively modulated the onset of xylogenesis under dry conditions,and the later determined the end of xylogenesis.The radial increment was regulated by rate and duration of cell production,with the maximum of growth rate occurring around the summer solstice.Short-term N addition did not affect wood formation dynamics.Secondly,we reviewed the roles of biological factors in regulating xylogenesis.The onset of xylogenesis differred among species,ages,and inter-specific competition.Seasonal dynamics of non-structural carbohydrates were coupled with wood formation.Finally,we reviewed the response mechanisms of xylogenesis to the interaction of climatic and biological factors.In conclusion,we put forward problems in current studies and prospected future development to provide reference for further scientific research.

关 键 词：微树芯 形成层 径向生长 气候因素 生物因素 

分 类 号：S718.4[农业科学—林学]