论文部分内容阅读
采用LI-8100土壤碳通量测定系统,测定了淮南大通煤矿塌陷复垦区女贞人工林土壤碳排放动态,并结合生物量调查,建立相对生长模型,对复垦区女贞林生态系统碳的源汇效应及其特征进行了研究。结果表明:复垦区女贞林生态系统年生物量碳增量为7.72 t/(hm~2·a),其中乔木层占81.22%,林下植被占4.02%,枯死掉落物占14.76%;乔木层生物量碳年增量大小顺序依次为树干>树枝>树根>树叶,在乔木层中所占的比例依次为54.7%、22.37%、16.9%、6.06%;女贞林生态系统年净生态系统生产力NEP值为1.87 t/(hm~2·a),表明复垦区女贞林生态系统整体表现为碳汇,其中乔木层对碳汇的贡献率占77.54%。
Using LI-8100 soil carbon flux measurement system, the soil carbon emission dynamics of Prunus armeniaca Plantation in the reclamation area of Datong Coal Mine in Huainan was measured. Based on the biomass survey, a relative growth model was established to evaluate the carbon sequestration of Pinus forest Source and sink effects and their characteristics were studied. The results showed that the annual biomass carbon increment of Pinus arboree forest ecosystem in reclamation area was 7.72 t / (hm ~ 2 · a), of which, the arbor layer accounted for 81.22%, the understory vegetation accounted for 4.02%, the dead and falling objects accounted for 14.76% . The order of annual increment of biomass carbon in arbor layer was in the order of tree trunk> tree branch> tree root> leaf, which accounted for 54.7%, 22.37%, 16.9% and 6.06% of arborous layer, respectively; The NEP value of net ecosystem productivity was 1.87 t / (hm ~ 2 · a), which indicated that the overall performance of Pinus forest was reclaimed carbon sequestration, and the contribution of arbor layer to carbon sequestration accounted for 77.54%.