马尾松成熟人工林分乔木层碳含量分析

Analysis of Carbon Content in Tree Layer of Mature Pinus massoniana Plantation

[目的]了解马尾松的碳汇量及其植株碳的分布格局,分析和评价其碳汇潜力。[方法]以广西环江县华山林场30年生马尾松成熟期人工林为研究对象,对其乔木层碳储量及其分配格局进行研究。[结果]马尾松成熟人工林同一植株不同部位其含碳量有所不同,不同植株相同部位含碳量也存在不同程度的差异。马尾松成熟期的干皮上、中、下部碳含量差异不显著,但干材部分上、中、下部碳含量存在显著差异(P<0.05)。马尾松植株不同器官平均碳素含量介于463.9~493.5 g/kg,各器官平均含碳量高低顺序为细根>干材>树叶>根蔸>中根>粗根>树枝>干皮。[结论]针对桂西北喀斯特石山区马尾松成熟人工林乔木层的碳储量进行研究,为其碳汇潜力分析和评价提供了科学的参考。

[Objective]The aim of this study was to understand the carbon sink of Pinus massoniana and its distribution pattern of plant carbon,and analyze and evaluate its carbon sink potential.[Method]Taking30-year-old Pinus massoniana mature plantation in Huashan forest farm of Huanjiang county,Guangxi as the research object,carbon storage and distribution pattern of tree layer were studied.[Result]The carbon contents in different parts of the same plant of mature Pinus massoniana plantation were different,and the carbon contents in the same part of different plants were also different to varying degrees.There was no significant difference in the carbon content of upper,middle and lower parts of dry bark at maturity stage,but there were significant differences in the carbon content of upper,middle and lower parts of dry wood(P<0.05).The average carbon content in different organs of Pinus massoniana ranged from 463.9 g/kg to 493.5 g/kg.The order of average carbon content in different organs was fine root>trunk>leaf>stems near roots>medium root>coarse root>branch>dry bark.[Conclusion]The carbon storage of tree layer of mature Pinus massoniana plantation in karst mountain area of northwest Guangxi was studied,which provided scientific reference for the analysis and evaluation of carbon sink potential.