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Position: Home > Articles > Carbon Density and Storage of Acacia mangium Plantation Ecosystem in Nanning,Guangxi Scientia Silvae Sinicae 2009,45 (2) 10-15

南宁马占相思人工林生态系统碳素密度与贮量

作  者：
何斌;刘运华;余浩光;秦武明;韦善华;蔡树威
单  位：
广西高峰林场;广西大学林学院;广西七坡林场
关键词：
马占相思人工林;年龄阶段;碳素密度;碳贮量;碳分配
摘  要：
对南宁市马占相思人工林3个不同年龄阶段(4,7和11年生)生态系统的碳素密度、贮量及其空间分布特征进行研究。结果表明:马占相思不同器官中碳素密度为455.4～494.5g.kg-1,各器官碳素密度表现为:皮>干或叶>枝>根;同一林分中各层次碳素密度表现为乔木层>灌木层>草本层;0～80cm土层中碳素密度随林龄增加而增大,且随土层深度增加而下降;3个年龄阶段马占相思人工林生态系统总碳贮量分别为117.63,176.70和202.08t.hm-2,其中乔木层分别占25.67%,46.10%和50.91%,灌木和草本层分别占1.82%,1.65%和1.62%,土壤层分别占69.84%,49.62%和44.59%%,凋落物层分别占2.68%,2.34%和2.88%;3个年龄阶段林分碳素年净固定量分别为10.66,15.70和12.55t.hm-2a-1,其中乔木层碳素年净固定量分别为7.54,12.14和9.36t.hm-2a-1,占林分总量的70.17%,74.14%和74.58%;凋落物层碳素年固定量分别为312,3.56和3.191t.hm-2a-1,占林分总量的70.17%,74.14%和74.58%。
译  名：
Carbon Density and Storage of Acacia mangium Plantation Ecosystem in Nanning,Guangxi
作  者：
He Bin1 Liu Yunhua2 Yu Haoguang2 Qin Wuming1 Wei Shanhua3 Cai Shuwei3(1.Forestry College,Guangxi University Nanning 530004;2.Gaofeng Forestry Farm of Guangxi Nanning 530001;3.Qipo Forestry Farm of Guangxi Nanning 530225)
关键词：
Acacia mangium plantation;age classes;carbon density;carbon storage;carbon distribution
摘  要：
Carbon density,storage and spatial distribution of three different age classes(4-year-old,7-year-old and 11-year-old) of Acacia mangium plantation ecosystems were investigated in the city of Nanning,Guangxi.The results indicated that carbon density in different organs of A.mangium ranged from 455.4 g·kg-1 to 494.5 g·kg-1,which in the order as follows: bark>stem or leaf >branch>root.The vertical distribution of carbon density within the stand was in the following order: tree layer>shrub layer>herb layer.Carbon density in the 0～80 cm of soil increased with the stand age increase,and decreased with the increase of soil deepness.The total carbon storages in three age classes of A.mangium plantation ecosystems were 117.63,176.70 and 202.08 t·hm-2,respectively.Of the total storage of carbon,25.67%～50.91% was distributed in tree layer,1.62%～1.82% at herb and shrub layer,44.59%～69.84% at soil layer,only 2.68%～2.88% at litter layer.Annual net carbon storage at three age classes of A.mangium plantation was respectively up to 10.66,15.70 and 12.55 t·hm-2 a-1 and 70.17%～74.58% of the total annual net carbon storage was distributed at tree layer,with the 44.59%～69.84% at little layer.Therefore,A.mangium plantation could obviously increase the carbon storage of ecosystem and prompt the potential capability of sequestrating atmospheric CO_2.

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