文献类型：期刊文献

中文题名：不同林龄和起源尾巨桉人工林生物量与碳储量的变化规律

英文题名：Variations of Ecosystem Biomass and Carbon Storage in Different Ages and Regenerations of Eucalyptus urophylla×E.grandis Plantation

作者：何普林[1] 林陈君[1] 赵俊[1] 宋杰[1] 竹万宽[2] 黄润霞[2]

第一作者：何普林

机构：[1]中林集团雷州林业局有限公司,广东湛江524043;[2]中国林业科学研究院速生树木研究所/广东湛江桉树林生态系统定位观测研究站,广东湛江524022

年份：2026

卷号：41

期号：1

起止页码：173-183

中文期刊名：西北林学院学报

外文期刊名：Journal of Northwest Forestry University

收录：;北大核心:【北大核心2023】；

基金：“十四五”国家重点研发计划项目(2023YFD2201005);广东省林业科技创新项目(2022KJCX020);广西重点研发计划项目(桂科AB23026010);广东湛江桉树林生态系统国家定位观测研究站运行项目(KS2024160017);林业生态监测网络平台运行项目数据采集(2024CG232)。

语种：中文

中文关键词：尾巨桉人工林;生物量;碳储量;林龄;分配格局;雷州半岛

外文关键词：Eucalyptus urophylla×E.grandis plantation;biomass;carbon storage;stand age;distribution pattern;Leizhou Peninsula

分类号：S792.39

摘要：为了阐明不同林龄尾巨桉(Eucalyptus urophylla×E.grandis)人工林生态系统固碳能力的差异,分析其生物量和碳储量的分布特征及影响因素。本研究以不同更新方式(植苗造林和萌芽造林)、不同林龄(1、3、5、7、8年)尾巨桉人工林为研究对象,依据收获法估测生物量,测定0~100 cm土层土壤和生态系统各层次的有机碳含量,以此估算生态系统的碳储量。结果表明:1)不同更新方式的尾巨桉人工林生物量和碳储量存在差异,但变化趋势总体一致。7—8年生时,萌芽造林的尾巨桉人工林生物量比植苗造林高30.17%和82.95%,萌芽造林的碳储量比植苗造林高16.73%和37.93%。2)乔木层的生物量和碳储量均随林龄的增加而增加。乔木层各器官碳储量以树干最大,占乔木层碳储量的61.83%,树干碳储量占比随林龄的增加而增加;其次为树根,占乔木层碳储量的23.60%;树枝和树叶分别占乔木层碳储量的6.00%和2.45%,碳储量占比均随林龄的增加而下降。3)生态系统生物量和碳储量总体表现为随林龄的增加而呈增加趋势。乔木层生物量在生态系统中占主要优势,达到78.32%以上;乔木层和土壤层是生态系统碳储量的主要贡献者,两者所占比例达到92.57%以上,只有极小部分的碳储量分布在林下地被物层(占比仅为5.21%)。适当延长尾巨桉人工林的经营周期可以增加尾巨桉人工林固碳,为“碳达峰、碳中和”目标的实现作出重要贡献。
To elucidate the differences of carbon sequestration capacity of E.urophylla×E.grandis plantation at different ages,and analyze the distribution characteristics and influencing factors of biomass and carbon storage.In this study,E.urophylla×E.grandis plantation with different regeneration methods(seedling and emergence regeneration)and different stand ages(1,3,5,7,8 a)were used as study objects.The biomass was estimated by harvesting method,and the organic carbon content in 0—100 cm soil layer and at various levels of the ecosystem was measured to estimate the carbon storage of the ecosystem.The results showed that 1)biomass and carbon storage of E.urophylla×E.grandis plantation at different regeneration methods were different,but the change trends were generally consistent.The biomass of the emergence regeneration of E.urophylla×E.grandis plantation in 7—8 year was higher than that of seedling regeneration(30.17%and 82.95%),while the carbon storage of the emergence regeneration was 16.73%and 37.93%higher than that of seedling regeneration.2)The biomass and carbon storage of tree layer increased with stand age.The carbon storage of tree stems was the largest,accounting for 61.83%of the carbon storage in tree layer,and increased with age.Followed by tree roots,accounting for 23.60%;branches and leaves accounted for 6.00%and 2.45%,respectively,which both decreased with age.3)The biomass and carbon storage of the ecosystem generally showed an increasing trend with stand age increased.The biomass of the tree layer dominated the ecosystem,reaching more than 78.32%.The tree layer and soil layer were the main contributors to the ecosystem carbon storage,accounting for more than 92.57%,and only a very small part of the carbon was distributed in the understory groundcover layer(only 5.21%).Properly extending the management cycle of E.urophylla×E.grandis plantation can increase carbon sequestration,which can make an important contribution to the realization of the goal of“Carbon Peak and Carbon Neutrality”.