摘要
【目的】森林是陆地生态系统的主体,在陆地碳循环中起着关键作用,因此在碳中和背景下,如何持续增加森林碳库储量以及提高森林碳汇功能,已成为各方关注的热点。合理的树种配置是提升森林质量和碳汇能力的基础。【方法】以长白山阔叶红松林25 hm^(2)固定样地连续15年(2004−2019年)4次群落调查数据为基础,分析了主要树种对地上生物量碳库储量贡献,比较不同树种固碳速率差异及在时间上的相关性。【结果】(1)2019年阔叶红松林地上生物量为(282.5±102.8)Mg/hm^(2),过去15年间年均净固碳速率约为1.0 Mg/hm^(2),在3个监测周期(2004−2009年、2009−2014年和2014−2019年)内的固碳速率分别为1.54、0.73和0.76 Mg/(hm^(2)·a);(2)样地内地上生物量最高的7个树种(紫椴、红松、蒙古栎、水曲柳、春榆、色木槭和大青杨)累计贡献量占整个群落总地上生物量的96.2%,其中紫椴、水曲柳和蒙古栎3个树种贡献了73.6%;(3)紫椴、水曲柳、蒙古栎、红松和春榆5个树种种群数量持续下降,而其平均胸径和地上生物量均呈现增加趋势,表明其大径级个体的固碳作用持续增强;(4)主要树种固碳速率存在明显差异(−0.97%~0.77%),其中具有复叶结构的水曲柳是地上生物量积累速率最快的树种,年均增速约为0.77%,其后依次是紫椴(0.60%)、春榆(0.54%)、蒙古栎(0.38%)、红松(0.09%)、色木槭(−0.46%)和大青杨(−0.97%);(5)7个种群在3个监测周期内表现出不同的增长动态,其中紫椴和色木槭、蒙古栎和红松、水曲柳和春榆之间表现出较高的正向波动关系,大青杨和春榆呈负向关系。因此,固碳速率在树种间存在时间上的异步性。【结论】该研究揭示的典型温带树种固碳规律、树种间固碳速率在时间上的异步性特点可为本地区植树造林实践中树种选择及配置提供一定的参考。
[Objective]How to improve the carbon sink role of forests under the background of carbon neutrality and continue to increase forest carbon storage has become a focus of attention of all parties.Reasonable tree species mixture is the basis for improving forest quality and carbon sink capacity.[Method]Based on the 15 years(2004−2019)consecutive data of four forest inventories in a 25 hectare dynamic sample plot of broadleaved Korean pine forest in Changbai Mountain of northeastern China,we analyzed the contribution of different tree species to aboveground biomass carbon storage,and compared the differences in carbon sequestration rates of different tree species as well as their interspecific asynchrony.[Result](1)The aboveground biomass of broadleaved Korean pine forest in the latest inventory was about(282.5±102.8)Mg/ha,and the annual mean net carbon sequestration rate of aboveground biomass was about 1.0 Mg/ha in the past 15 years.The carbon sequestration rates among the three periods(2004−2009,2009−2014,2014−2019)were 1.54,0.73 and 0.76 Mg/(ha·year),respectively.(2)The aboveground biomass of the seven dominant tree species accounted for about 96.2%of the total aboveground biomass of the entire community,and the three most important tree species(i.e.,Tilia amurensis,Fraxinus mandshurica and Quercus mongolica)contributed 73.6%of the total aboveground biomass.(3)The population number of five tree species,including Tilia amurensis,Fraxinus mandshurica,Quercus mongolica,Pinus koraiensis and Ulmus japonica,continued to decline,while their average DBH and aboveground biomass showed a directional increasing trend.(4)The aboveground biomass carbon sequestration rate of the seven dominant tree species ranged from−0.97%to 0.77%,and Fraxinus mandshurica with compound leaf character had the fastest aboveground biomass accumulation rate(0.77%),followed by Tilia amurensis(0.60%),Ulmus japonica(0.54%),Quercus mongolica(0.38%),Pinus koraiensis(0.09%),Acer mono(−0.46%),Populus ussuriensis(−0.97%).(5)The seven most important populations showed different growth dynamics during three monitoring periods,and the relationships between Tilia amurensis and Acer mono,Quercus mongolica and Pinus koraiensis,Fraxinus mandshurica and Ulmus japonica showed a relative higher positive correlation relationship,whereas a negative relationship existed between Populus ussuriensis and Ulmus japonica.[Conclusion]The temporal asynchrony of carbon sequestration rates among tree species could provide a certain reference for tree species selection and configuration in afforestation practice in this area.
作者
原作强
王星
毛子昆
蔺菲
叶吉
房帅
王绪高
郝占庆
Yuan Zuoqiang;Wang Xing;Mao Zikun;Lin Fei;Ye Ji;Fang Shuai;Wang Xugao;Hao Zhanqing(School of Ecology and Environment,Northwestern Polytechnical University,Xi’an 710129,Shaanxi,China;Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China;Chinese Academy of Sciences,Key Laboratory of Terrestrial Ecosystem Carbon Neutrality,Liaoning Province,Shenyang 110016,Liaoning,China)
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2022年第10期43-51,共9页
Journal of Beijing Forestry University
基金
国家自然科学基金面上项目(31730015、32171581、31961133027)
辽宁省基金面上项目(2021-MS-028),中央高校基本科研业务费专项。
关键词
生物量碳库
生长速率
外生菌根树种
复叶结构
异步性
biomass carbon stock
growth rate
ectomycorrhizal tree species
compound leaf structure
asynchrony
