Effects Research Of Different Management Approaches On Net Carbon Sequestration Capacity In Moso Bamboo Forest Ecosystem

Moso bamboo stand is a very important forest resource in Zhejiang province and China. It has excellent carbon sequestration potential and can play an important role in coping with climate change. The international society have gradually recognized REDD+ forest carbon sequestration mechanism and greatly expanded the development space of forest carbon sinks and also brought opportunities and challenges for China’s bamboo management in recent years. In this study, vegetation biomass carbon pool was changed to affect soil carbon pool through bamboo forest management. The two-factor randomized block design was used to eliminate the influence of topographical factors and twomanagement measures(fertilization and cutting) were applied to investigate the changes in soil carbon pool, vegetation carbon pool, carbon emission, carbon leakage and net amount of carbon sequestration in bamboo forest ecosystems during the period from 2010 to 2013. Results showed that it was no significant differences(p>0.05) in SOM storage changes at 0-50 cm soil depth but differences in SOM concentration changes at 0-10 cm soil depth were significant(p<0.05). Because most bamboo roots concentrated in 0-20 cm soil depth, and the impact of the soil organic carbon changes were mainly manifested in the topsoil under different management measures, and also the thickness of topsoil which had differences only 10 cm. Differences of under canopy vegetation carbon storage was not significant(p>0.05) while Differences of total vegetation carbon storage and Moso bamboo carbon storage were highly significant(p<0.01) between 2010 and 2013. It was no significant differences(p>0.05) in SOM storage changes under different fertilization treatments, cutting and leaving treatments, soil layers and interaction effect. The differences in total vegetation carbon storage changes under different fertilization treatments in Moso bamboo forest were not significant(p>0.05) but differences under different cutting and leaving treatments were highly significant(p<0.01). The interaction effect was not obvious. Differences of net amount of carbon sequestration were significant(p<0.05) between treatments of A2B3(intermediate fertilization level with low-intensity cutting and high density leaving measure) and treatments of A1B1(high fertilization level with high intensity cutting and low density leaving measure). The highest net amount of carbon sequestration was 64.721tC?hm-2 in treatments A2B3, and lowest was-14.237tC?hm-2 in treatments A1B1. Implying that Excessive intensive management may cause carbon emissions of Moso bamboo forest ecosystem, while a reasonable mode of management were useful for carbon accumulation of Moso bamboo forest ecosystem. The sum of soil carbon pool changes and Moso bamboo carbon pool changes accounted for 94.36% of all carbon pool changes. When we monitoring and measurement carbon sequestration projects, we can considered to ignore the under canopy vegetation carbon pool and transportation leakage. The fertilization emissions were mainly determined by the fertilization amount, we can calculated it directly through the fertilization amount. At the same time we put forward a management plan which can raise the capacity of moso bamboo forest net carbon sequestration by researching the impact on net carbon sequestration capacity under different management measures in moso bamboo forest, namely treatments A2B3(intermediate fertilization level with low-intensity cutting and high density leaving measure). With the extension of time, the test result in fixed sample will be hoping to make a more accurate and thorough explanation of the net carbon sequestration capacity changes under different management measures.