论文部分内容阅读
造林工程对生态环境的恢复发挥着重要的作用,对全球的碳素循环有重要影响。以内蒙古农牧交错带退牧还林的油松(Pinus tabulaeformis)人工林为研究目标,以未退牧的天然草地作为参考,分析了造林工程对生态系统中的碳储量以及碳循环造成的影响。结果表明:造林工程使植被碳库碳储量快速提高,且随着油松林龄的增长,土壤碳库呈现先降低后逐渐升高的动态变化,凋落物碳库与生态系统的碳库随着林龄的增长而呈缓慢增长的趋势;油松林木平均碳汇速率由大到小表现为:中龄林>近熟林>幼龄林>成熟林;以成熟林(43 a)为参照,油松林林分植被碳库固碳潜力为3 695.28 g/m2,生态系统固碳潜力为4 384.99 g/m2。研究结果表明,从长远来看,研究区进行退牧还油松人工林后,生态系统固碳效果是可观的碳汇。
Afforestation projects play an important role in the restoration of ecological environment and have a significant impact on the global carbon cycle. In this paper, Pinus tabulaeformis plantation in the interlaced zone of agriculture and animal husbandry in Inner Mongolia was used as the research objective, and the natural grassland was used as a reference to analyze the effect of afforestation on the carbon storage and carbon cycle in the ecosystem . The results showed that: the afforestation project increased the carbon storage of vegetation carbon quickly, and with the increase of the age of Pinus tabulaeformis, the soil carbon pool showed the first decrease and then increased gradually. The carbon pool of litter carbon and ecosystem had the following characteristics: The average carbon sink rate of Pinus tabulaeformis forest showed as follows: Middle-aged forest> Near-mature forest> Young forest> Mature forest; According to the mature forest (43 a) The carbon sequestration potential of Pinus forest stands is 3 695.28 g / m2, and the ecosystem carbon sequestration potential is 4 384.99 g / m2. The results show that in the long run, the ecosystem carbon sequestration is a considerable carbon sequestration in the study area after returning Pinus tabulaeformis plantation.