桂西北马尾松人工林生态系统碳贮量与分布  

Carbon storage and distribution of Pinus massoniana plantation ecosystem in northwest Guangxi

作　　者：韦明宝 王朝健 杨正文 黄振格 王汉敢 何斌[3] WEI Mingbao;WANG Chaojian;YANG Zhengwen;HUANG Zhenge;WANG Hangan;HE Bin(Shankou Forset Farm of Nandan County,Nandan,Guangxi 547200,China;Forestry Bureau of Nandan County,Nandan,Guangxi 547200,China;Forestry College,Guangxi University,Nanning,Guangxi 530004,China)

机构地区：[1]南丹县山口林场,广西南丹547200 [2]南丹县林业局,广西南丹547200 [3]广西大学林学院,广西南宁530004

出　　处：《亚热带农业研究》2019年第3期152-156,共5页Subtropical Agriculture Research

基　　金：国家自然科学基金(31560206,31760201);广西创新驱动发展专项(桂科AA17204087-11)资助项目

摘　　要：[目的]探究桂西北马尾松人工林的碳汇功能,为合理评估其生态效益提供依据。[方法]以广西南丹县26年生马尾松人工林为研究对象,采用野外调查和实验室分析方法,研究马尾松人工林生态系统碳含量、碳储量及其空间分布格局。[结果]马尾松平均碳含量为489.3 g·kg^-1,不同器官碳含量依次为:树叶>干材>干皮>树根>树枝;林下灌木层、草本层和凋落物层碳含量分别为453.0、425.6和433.8 g·kg^-1;林地土壤有机碳含量变化范围为6.20~32.15 g·kg^-1,随土壤层深度增加而降低。马尾松人工林生态系统碳储存量为232.13 t·hm^-2,其中乔木层、灌木层、草本层、凋落物层和土壤层分别为92.67、1.36、1.12、2.49和134.49 t·hm^-2,依次占整个生态系统碳贮量的39.92%、0.59%、0.48%、1.07%和57.94%。马尾松人工林乔木层年净生产力为10.83 t·hm^-2·a^-1,年净固碳量为5.41 t·hm^-2·a^-1,年净吸收CO2量为19.83 t·hm^-2·a^-1。[结论]桂西北马尾松人工林具有较高的碳汇功能,为该区域碳汇林业的经营提供了依据。[Purpose]To explore the carbon sink function of Pinus massoniana plantation in northwestern Guangxi,and to provide a basis for rational assessment of its ecological benefits.[Method]Taking 26-year-old P.massoniana plantation in Nandan County of Guangxi as the research object,the field carbon content,carbon storage and spatial distribution pattern of P.massoniana plantation ecosystem were studied by field investigation and laboratory analysis.[Result]The average carbon content of P.massoniana was 489.3 g·kg^-1,and the carbon content of different organs varied from high to low:leaf>stem>bark>root>branch.The carbon content of understory shrub layer,herb layer and litter layer was 453.0,425.6 and 433.8 g·kg^-1,respectively.The soil organic carbon content in forest land varied from 6.20 to 32.15 g·kg^-1,which decreased with increasing soil depth.The carbon storage of the P.massoniana plantation ecosystem was 232.13 t·hm^-2,of which the tree layer,shrub layer,herb layer,litter layer,and soil layer were 92.67,1.36,1.12,2.49,and 134.49 t·hm^-2,respectively,accounting for 39.92%,0.59%,0.48%,1.07%,and 57.94%of the total ecosystem carbon storage.The annual net productivity of tree layer of the P.massoniana plantation was 10.83 t·hm^-2·a^-1,the annual net carbon sequestration was 5.41 t·hm^-2·a^-1,and the annual net CO2 absorption was 19.83 t·hm^-2·a^-1.[Conclusion]P.massoniana plantation in northwestern Guangxi has a high carbon sink function,which provides a basis for the management of carbon sink forestry in this region.

关 键 词：马尾松人工林 碳贮量 碳分配 桂西北 

分 类 号：S792.39[农业科学—林木遗传育种]