北京东灵山地区典型灌丛碳密度分配格局  

Carbon density and its spatial distribution pattern of typical shrublands in Mt.Dongling,Beijing,China

作　　者：张建华 周晓阳 马卉 宿贵霞 刘勇[3] 张红[3] 徐龙超 ZHANG Jianhua;ZHOU Xiaoyang;MA Hui;SU Guixia;LIU Yong;ZHANG Hong;XU Longchao(Department of Biology,Xinzhou Normal University,Xinzhou 034000,China;College of Environment and Ecology,Taiyuan University of Technology,Jinzhong 030600,China;Institute of Loess Plateau,Shanxi University,Taiyuan 030006,China)

机构地区：[1]忻州师范学院生物系,忻州034000 [2]太原理工大学环境与生态学院,晋中030600 [3]山西大学黄土高原研究所,太原030006

出　　处：《生态学报》2025年第5期2346-2354,共9页Acta Ecologica Sinica

基　　金：NSFC山西煤基低碳联合基金(U1910207);国家自然科学基金青年基金(31700413);山西省高等学校人文社会科学重点研究基地项目(20210122);山西省基础研究计划(自由探索类)(202203021221224)。

摘　　要：灌丛面积增加引起的碳储量增加是我国陆地生态系统碳储量增加的重要原因之一,也被认为是陆地生态系统碳汇研究中的一个不确定因素。为揭示华北地区灌丛生态系统不同层片的碳密度,采用野外调查和异速生长方程法,研究了北京东灵山2种典型灌丛(绣线菊和荆条)生态系统的碳密度及分布特征。结果表明:荆条灌丛总碳密度(92.32 t/hm^(2))显著高于绣线菊灌丛(70.47 t/hm^(2))(P<0.05),其中土壤碳密度占绝对优势(94.96%和91.54%),分别为87.67 t/hm^(2)和64.51 t/hm^(2),土壤有机碳富集在0—30 cm土层中,且土壤有机碳密度随土层加深呈减小趋势。荆条灌丛各土层有机碳密度均高于绣线菊灌丛,这可能与荆条灌丛凋落物产量、质量较高及其根系垂直分布范围广等因素有关。荆条和绣线菊灌丛灌木层对整个生态系统碳密度贡献较小(4.73%和7.86%),分别为4.37 t/hm^(2)和5.54 t/hm^(2),其中灌木层中枝的碳密度占绝对优势,其次为根和叶。灌木层碳密度与灌木密度显著正相关(P<0.05)。2种灌丛草本层对灌丛总碳密度贡献最小(0.31%和0.60%),分别为0.28 t/hm^(2)和0.42 t/hm^(2),且二者碳密度均表现为地上部分大于地下部分。对灌丛碳密度开展评估,为区域陆地生态系统碳循环的构建和校验提供了重要的实测数据,也为灌丛生态管理提供更有力的数据支持。Shrub recovery is one of significant contributors to the increase of carbon stocks in terrestrial ecosystems in China,yet there remains considerable uncertainty regarding the contribution of shrubs to the carbon sink.To reveal the carbon density of different layers of shrublands in North China,the carbon density and distribution characteristics of two typical shrub lands(Vitex negundo var.heterophylla and Spiraea salicifolia)in Dongling Mountain,Beijing,were measured based on the field investigation data and by employing allometric approaches.The results showed that the total carbon density(92.32 t/hm^(2))of V.negundo shrubland was significantly higher than that(70.47 t/hm^(2))of S.salicifolia shrubland(P<0.05),in which the carbon storage of soil layer was the most(94.96%and 91.54%),and the carbon storage were 87.67 t/hm^(2) and 64.51 t/hm^(2),respectively.Soil organic carbon was enriched in the 0—30 cm soil layer,and showed a decreasing trend with increasing soil depth.The organic carbon density in different soil layers of the V.negundo shrubland is higher than that of the S.salicifolia shrubland,possibly due to factors such as the high yield,quality of the litter,and wide vertical distribution range of roots of V.negundo shrubland.The contribution of the shrub layer of V.negundo shrubland and S.salicifolia to the carbon density of the entire ecosystem is relatively small(4.73%and 7.86%),and the carbon density were 4.37 t/hm^(2) and 5.54 t/hm^(2),respectively,in which,the carbon density of branches in the shrub layer was the highest,followed by root,and then leaf.The carbon density of the shrub layer was markedly positively correlated with the shrub density(P<0.05).The herbaceous layer of the two shrublands contributes the least to the total carbon density of shrublands(0.31%and 0.60%),and the carbon density were 0.28 t/hm^(2) and 0.42 t/hm^(2),respectively,and the aboveground part of the herbaceous layer has a higher carbon density than the underground part.Evaluating the carbon density of shrublands provides

关 键 词：灌丛 生物量 碳密度 碳分配 东灵山 

分 类 号：Q94[生物学—植物学]