山西太岳山31年生华北落叶松人工林碳汇功能的研究

Carbon sequestration capacity of a 31-year-old Larix principis-rupprechtii plantation on Mt. Taiyue,Shanxi

人工林生态系统的固碳作用对缓解全球气候变化发挥着重大的作用。以山西太岳山31年生落叶松人工林为研究对象,通过野外调查和室内分析,对其生物量、各组分碳含量、碳储量及空间分布进行了测定。结果表明:1)华北落叶松单木生物量和胸径、树高之间存在紧密的相关关系。林分平均生物量为166.82t·hm^(-2)。各层次按大小排列为:乔木层(111.95t·hm^(-2))>枯落物层(36.67t·hm^(-2))>草本层(17.85t·hm^(-2))>灌木层(0.35t·hm^(-2))。2)华北落叶松人工林生态系统各组分平均碳含量为(单位:g C·g^(-1)):树干0.4846、树皮0.5030、树枝0.4753、树叶0.4732、根系0.4563、灌木层0.4161、草本层0.2898、土壤层(0~60cm)0.0176,随着土壤深度增加碳含量逐渐降低。3)华北落叶松人工林生态系统总碳储量为178.3t·hm^(-2),其中土壤层为最大碳库,储量为112.97t·hm^(-2),占总碳储量的63.36%。植被层总碳储量为59.06t·hm^(-2),占总碳储量的33.13%。按大小顺序排列为乔木层54.06t·hm^(-2)、草本层4.85t·hm^(-2)、灌木层0.15t·hm^(-2)。枯落物层碳储量为6.26t·hm^(-2),占总储量的3.51%。4)华北落叶松人工林乔木层年净生产力为9.21t·hm^(-2)·a^(-1),碳素年平均固定量为4.38t·hm^(-2)·a^(-1)。

The carbon sequestration function of plantation mate change. We measured the biomass, carbon content, ecosystem plays a significant role to alleviate global cli- carbon storage and carbon partitioning of a 31 - year - old Larix principis - rupprechtii by field investigation and laboratory analysis on Mt. Taiyue, Shanxi, China. It was found that the biomass of the individual tree was closely related with the diameter at the breast height and tree height. The mean stand biomass was 166.82t hm-2, and the biomass of each layer was in order of tree layer （111. 95t hm-2） 〉 litter layer（36.67t hm-2） 〉 herb layer （17.85t hm-2） 〉 shrub layer（0.35t hm-2 ）. The average carbon content in each components of the plantation ecosystem was 0. 4846gC g-1 stem ,0.5030gC g-1inbark ,0.4753gC g-1 in brank , 0.4732gC g-1 inleaf,0.4563gC g-1 root , 0. 4161gC g-1i in shrub layer , 0. 2898gC g-1 in herb layer, 0. 0176gC g-1 in soil layer（0 -60cm）. The car- bon content gradually reduced with the increasing of soil depth. The total carbon storage of the plantation ecosys- tem was 178.3t hm-2 of which, the carbon storage of soil layer was 112.97t hm-2, accounting for 63.36% of the total as the biggest carbon library. The carbon storage of vegetation layer was 59.07t hm-2, accounting for 33.13% of the total, and the each layer was in order of tree layer（54.06t hm-2） 〉 herb layer（4.85t hm-2） 〉 shrub layer（0.15t hm-2）. The carbon storage of litter layer was 6.26t hm-2, accounting for 3. 51% of the total. The tree layer had an annual net productivity of 9.21t hm-2 . a-1, and its annual net carbon sequestration was 4.38t hm-2 . a -1.