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为了探讨不同恢复方式对大兴安岭重度火烧迹地碳储量的影响,以人工恢复(兴安落叶松、樟子松)和天然恢复的林分为研究对象,采用干烧法对乔木层、灌木层、草本层和枯枝落叶层含碳率进行测定.采用全收获法和平均标准木法获得林分各组分生物量估算森林植被的碳储量,分析不同恢复方式下林分各组分碳储量的分配特征.结果表明:人工恢复和天然恢复的林分灌木层平均含碳率高于乔木层和草本层.兴安落叶松人工林灌木层平均含碳率为45.8%、枯枝落叶层为45.3%、乔木层为44.4%、草本层为33.6%.樟子松人工林灌木层和乔木层平均含碳率高于50%.天然次生林乔木层、灌木层和枯枝落叶层平均含碳率在42%左右.森林植被层中,生物量贡献率从大到小依次为乔木层、灌木层和草本层.兴安落叶松人工林森林植被层和枯枝落叶层生物量总和为123.90 t·hm-2,远高于樟子松人工林和天然次生林.火烧后人工恢复23年的兴安落叶松人工林森林植被碳储量为50.97 t·hm-2,其中,乔木层碳储量为49.87 t·hm-2,占森林植被层总碳储量的97.8%,草本层所占比重仅为0.02%.人工恢复的林分植被层总碳储量高于天然恢复的林分,火烧迹地在这一时段内采用人工恢复的方式较天然恢复碳汇能力更强.
In order to investigate the effect of different restoration methods on the carbon storage of heavy fire burned sites in the Greater Hinggan Mountains, artificial restoration (Larix gmelinii, Pinus sylvestris var. Mongolica) and natural restoration forests were used as the research object. The effects of different restoration methods on the carbon storage of arbor, shrub layer, And the litter layer carbon content were determined.Using the method of harvesting and average standard wood to obtain the biomass of each component of forest, the carbon storage of forest vegetation was estimated and the distribution characteristics of carbon storage of each component under different restoration methods The results showed that the average carbon sequestration rate of artificially restored and naturally restored stands was higher than that of the arbor and herb layers.The average carbon content of the shrub layer of Larix gmelinii plantation was 45.8% and the litter layer was 45.3% The average carbon content of shrub layer and arbor layer of Pinus sylvestris var. Mongolica was higher than 50% .The average carbon content of arbor, shrub layer and litter layer in natural secondary forest was about 42% In the forest vegetation layer, biomass contribution rate descending order was arbor, shrub layer and herb layer.The total biomass of forest vegetation layer and litter layer in Larix gmelinii plantation was 123.90 t · hm-2 Higher than Pinus sylvestris artificial Forest and natural secondary forest.The carbon storage of forest vegetation of Larix gmelinii plantation after artificial restoration for 23 years after fire was 50.97 t · hm-2, in which the carbon storage of arbor layer was 49.87 t · hm-2, accounting for the total carbon storage of forest vegetation layer And the percentage of herbaceous layer was only 0.02%. The total carbon storage of artificial restoration stands was higher than that of natural restoration, and the burned ground was more natural than the natural restoration of carbon sink during this period Stronger