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研究了湖南鹰嘴界自然保护区内马尾松(Pinus massoniana)林、马尾松阔叶树混交林和常绿阔叶林这3种处于不同演替阶段森林类型的碳储量及时空分布格局。结果表明:3种类型森林生态系统碳储量分别为182.86、179.84和229.12MgC·hm-2,其中乔木层占59.57%～67.88%,随森林进展演替增加,乔木层是生态系统碳储量主要贡献者,且各林分均以树干占乔木层碳储量比例最大;土壤层占31.05%～36.55%,碳储量随演替进展而增加,但对森林生态系统碳储量贡献率减小;林下植被和凋落物层分别占0.41%～3.04%和0.65%～2.53%,均随演替进展而减少,对生态系统碳储量贡献微弱;演替过程中生物量碳与土壤碳储量比为1.96、1.69和2.20,生物量碳在生态系统碳储量中所占比例呈增加趋势。可见在常绿阔叶林分布区,实施近自然林经营,模拟常绿阔叶林结构,是提升该区域森林碳汇能力的重要途径。
The carbon storage and temporal-spatial distribution patterns of Pinus massoniana forest, Pinus massoniana mixed forest and evergreen broad-leaved forest in different succession stages in the Yingkou Nature Reserve of Hunan Province were studied. The results showed that the carbon stocks of the three types of forest ecosystems were 182.86,179.84 and 229.12MgC · hm-2, respectively, of which the tree layer accounted for 59.57% -67.88%. With the forest succession increasing, the tree layer was the main contribution of ecosystem carbon storage , And the tree stratum accounted for 31.05% -36.55% of the total carbon storage in the arbor layer. The carbon storage increased with the succession, but the contribution to the carbon storage in forest ecosystem decreased. The understory vegetation And litter layer accounted for 0.41% ~ 3.04% and 0.65% ~ 2.53%, both decreased with the succession progress and contributed little to the ecosystem carbon storage. The biomass carbon and soil carbon storage ratio in the succession process were 1.96 and 1.69 And 2.20, the proportion of biomass carbon in the ecosystem carbon stock tends to increase. It can be seen that in the evergreen broad-leaved forest distribution area, the management of near-natural forests and the simulation of evergreen broad-leaved forest structures are important ways to enhance the ability of forest carbon sequestration in this area.