山西油松人工林生态系统生物量、碳积累及其分布  

Biomass,carbon accumulation and its partitioning of a Pinus tabulaeformis plantation ecosystem in Shanxi Province,China

作　　者：程小琴[1] 韩海荣[1] 康峰峰[1] 

机构地区：[1]北京林业大学林学院,北京100083

出　　处：《生态学杂志》2012年第10期2455-2460,共6页Chinese Journal of Ecology

基　　金：国家林业公益性行业科研专项(201104008);国家林业局948项目(2010-4-15)资助

摘　　要：油松是我国北方主要的造林树种之一,准确估计油松人工林生态系统的生物量及碳储存对研究区域人工林的碳储功能具有重要意义。本研究采用固定样地方法对38年生油松人工林的生物量、碳贮量及其空间分布进行测定,并估算了其净生产力与年净碳固定量。结果表明:(1)油松单木生物量与胸径和树高之间均存在着紧密的相关关系。林分平均生物量为145.35t.hm-2,其中乔木层为123.98t.hm-2,占林分生物量的85.30%。(2)油松人工林生态系统各组分碳含量为:树干0.5032gC.g-1,树皮0.4887gC.g-1,树枝0.5414gC.g-1,树叶0.4774gC.g-1,树根0.4862gC.g-1;灌木层0.4468gC.g-1;草本层0.4417gC.g-1;枯落物层0.4112gC.g-1;土壤层(0～100cm)0.0090gC.g-1,随土层深度增加各层次土壤碳含量逐渐减少。(3)油松人工林生态系统总碳贮量为172.95t.hm-2,各层碳贮量的大小顺序为土壤(0～100cm)(102.07t.hm-2)>乔木层(62.08t.hm-2)>枯落物层(7.75t.hm-2)>灌木层(0.58t.hm-2)>草本层(0.47t.hm-2)。油松各器官的碳贮量与其生物量呈正比,树干的生物量最大,其碳贮量也最大,占乔木层碳贮量的58.80%。(4)油松人工林年净生产力为10.19t.hm-2.a-1,有机碳年固定量为5.03tC.hm-2.a-1。Pinus tabulaeformis（Carr.） is one of the main forestation tree species in northern China. To accurately estimate the biomass and carbon storage of P. tabulaeformis plantation ecosystem is critical to the study of the carbon sequestration function of regional P. tabulaeformis plantations. By using plot sampling method, this paper measured the biomass, carbon storage, and carbon partitioning of a 38-year-old P. tabulaeformis plantation in Shanxi Province, and estimated the net productivity and annual net carbon sequestration of the plantation. It was found that the biomass of the individual tree was closely correlated with the diameter at breast height and tree height. The mean stand biomass was 145.35 t·hm^-2, of which, tree layer biomass was 123.98 t·hm^-2, accounting for 85.30% of the total. The carbon content in various components of the plantation ecosystem was 0.5032 g C·g^-1 in stem, 0.4887 g C·g^-1 in bark, 0.5414 g C·g^-1 in branch, 0.4774 g C·g^-1 in leaf, 0.4862 g C·g^-1 in root, 0.4468 g C·g^-1 in shrub layer, 0.4417 C·g^-1 in herb layer, 0.4112 g C·g^-1 in litter layer, and 0.0090 g C·g^-1 in soil layer （0-100 cm）, and the soil carbon content was decreased gradually with depth. The total carbon storage of the plantation ecosystem was 172.95 t·hm^-2, and the carbon storage of each layer was in the order of soil layer （102.07 t·hm^-2） 〉 tree layer （62.08 t·hm^-2） 〉 litter layer （7.75 t·hm^-2） 〉 shrub layer （0.58 t·hm^-2） 〉 herb layer （0.47 t·hm^-2）. The carbon storage in different tree organs was positively correlated with their biomass. Stem had the highest biomass, and its carbon storage was also the greatest, accounting for 58.80% of the tree layer’s. The plantation had an annual net productivity of 10.19 t·hm^-2·a^-1, and its annual net carbon sequestration was 5.03 t C·hm^-2·a^-1.

关 键 词：生物量 碳含量 碳积累 油松 

分 类 号：S718.5[农业科学—林学] S791.254