林业科学2017，Vol.53Issue(2)：1-9,9.DOI:10.11707/j.1001-7488.20170201
不同经营措施对毛竹林生态系统净碳汇能力的影响
Effects of Different Management Measures on the Net Carbon Sequestration Capacity of Moso bamboo Forest Ecosystem
摘要
Abstract
[Objective] Moso bamboo shows excellent carbon sequestration potential and plays an important role in combating climate change.Managing bamboo forests affects not only soil carbon pool,but also vegetation carbon pool,and there comes along with carbon emissions and carbon leakage problems.It is of vital significance to study the comprehensive effect of different management measures on the carbon in bamboo forest ecosystem.[Method] A two-way randomized block design was adopted to evaluate the effects of different management measures on net carbon sequestration capacity of moso bamboo forest ecosystem during 2010 to 2013.Excluding the effects of topographical factors,we chose fertilization intensity and harvesting model as the two factors,and each of them was set with three levels,coming to a total of nine treatments: high intensities of both fertilization and harvesting,high intensity of fertilization with intermediate intensity of harvesting,high intensity of fertilization with low intensity of harvesting,intermediate intensity of fertilization with high intensity of harvesting,intermediate intensities of both fertilization and harvesting,intermediate intensity of fertilization with low intensity of harvesting model,no fertilization with high intensity of harvesting model,no fertilization with intermediate intensity of cutting,no fertilization with low harvesting model.[Result] Results showed that between 2010 and 2013 there were no significant differences (P>0.05) in SOM storage in 0-10 cm soil layer but differences were significant (P<0.05) in SOM storage in 0-50 cm soil layer.Differences of carbon storage by under canopy vegetation was not significant (P>0.05) while differences of total carbon storage by vegetation and moso bamboo carbon storage were highly significant (P<0.01).The total transportation leakage from sample area accounted for only 7.32% of total fertilization emissions inside sample area.Differences of net carbon sequestration were significant (P<0.05) between treatments of A2B3 (intermediate fertilization intensity with low intensity of harvesting and high retention model) and treatments of A1B1 (high fertilization intensity with high intensity of harvesting and low retention model).The highest net carbon sequestration was 64.721 tC·hm-2 in treatments A2B3,and the lowest was-14.237 tC·hm-2 in treatments A1B1.It implies that excessive intensive management may cause carbon emissions in moso bamboo forest ecosystem,and a reasonable model of management will benefit carbon accumulation in moso bamboo forest ecosystem.The soil carbon pool changes accounted for 70.99%±12.30% of all carbon pool changes,the moso bamboo carbon pool for 23.37%±11.24%,the under canopy vegetation carbon pool for 0.63%±0.37%,the transportation leakage for 0.40%±0.16%,and fertilization emissions for 4.60%±4.85%.The sum of soil carbon pool changes and moso bamboo carbon pool changes accounted for 94.36% of all carbon pool changes.[Conclusion] When monitoring and measuring carbon sequestration,for cost saving,we may consider to ignore the under canopy vegetation carbon pool and transportation leakage.The study also showed that under the common management measure of moso bamboo forest,i.e.,high fertilization intensity with high harvesting intensity,the total carbon storage by vegetation increases slowly,and soil carbon emission is significant,which goes against the accumulation of net carbon sequestration in moso bamboo forests.We suggest that intermediate fertilization intensity with low harvesting intensity be the best measure to increase carbon sequestration in moso bamboo forests,not only the total vegetation carbon storage increases most,but also soil carbon pool,it is a most favorable model of management for increasing carbon sequestration and reducing the emission of carbon dioxide.关键词
毛竹林/经营措施/土壤碳库/植被碳库/排放泄漏/净碳汇量Key words
moso bamboo forest/management measure/soil carbon pool/vegetation carbon pool/emission and leakage/net amount of carbon sequestration分类
农业科技引用本文复制引用
李翀,周国模,施拥军,周宇峰,徐林,范叶青,沈振明,李少虹,吕玉龙..不同经营措施对毛竹林生态系统净碳汇能力的影响[J].林业科学,2017,53(2):1-9,9.基金项目
国家自然科学重大基金(61190114) （61190114）
国家"十二五"科技支撑项目(2012BAD22B0503) （2012BAD22B0503）
国家自然科学基金资助项目(31370637) （31370637）
浙江省森林生态系统碳循环与固碳减排重点实验室开放基金项目(FCLAB2015003). （FCLAB2015003）
