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森林重建被认为是提高生态系统碳汇功能的重要措施.通过调查研究了两种重建方式(自然更新和人工造林)对亚热带森林生态系统碳储量及其分配格局的影响,并与地带性常绿阔叶林进行了比较.结果表明,自然更新的次生林生态系统碳储量(植被+土壤+枯落物)约为257.59thm-2,人工营造的杉木(Cunninghamia lanceolata)林、蓝果树(Nyssasinensis)林分别为230.93和163.49thm-2,表明在亚热带九连山区,自然重建方式在森林碳汇功能上优于人工重建方式.但上述森林碳储量仍然显著低于地带性植被的碳储量(299.13thm-2),表明这些森林仍具有较大的碳汇潜力.自然重建方式经济投入少,对土壤碳库扰动较小,且植被碳储量显著高于速生人工林,说明在种源丰富、自然环境较好的亚热带林区,在30多年的时间尺度上自然重建方式具有较高的固碳效益,这对于我国碳汇林建设、提高生态系统的固碳效益具有重要的指导意义.
The reconstruction of forest is considered as an important measure to improve the carbon sink function of ecosystem.It investigates the effect of two kinds of reconstruction methods (natural regeneration and artificial afforestation) on carbon storage and its distribution pattern in subtropical forest ecosystem, The results showed that the carbon stocks (vegetation + soil + litter) of the secondary natural forest ecosystems were about 257.59thm-2, the artificial Cunninghamia lanceolata forest, Nyssasinensis forest 230.93 and 163.49thm-2, respectively, indicating that the natural rebuilding method is better than artificial rebuilding in the forest carbon sequestration function in the subtropical Jiulianshan Mountains, but the above-mentioned forest carbon storage is still significantly lower than that of zonal vegetation (299.13thm- 2), indicating that these forests still have greater potential for carbon sinks.The natural reconstruction methods have less economic input and little disturbance to the soil carbon pool, and the vegetation carbon storage is significantly higher than the fast-growing plantations, indicating that in the rich provenances, the natural environment Good subtropical forest areas, in the 30-year time scale, natural rebuilding methods have high carbon sequestration benefits, which for our carbon sequestration forest construction, improve ecosystem carbon sequestration It has important guiding significance.