山白兰人工林生态系统碳储量及空间分布特征

[目的]揭示山白兰人工林碳储量的空间分布特征及规律,为森林生态系统碳储量估算提供基础数据,也为进行人工林碳汇造林项目提供科学参考。[方法]以南亚热带地区27年生山白兰人工林为研究对象,采用标准木法、样方收获等方法对其生物量、碳含量分配进行研究。[结果]山白兰人工林生态系统碳储量为158.21 t/hm2,其中乔木层占植被层碳储量的87.24%,灌木层占10.77%,草本层占0.18%,凋落物层占1.81%;土壤层中0～80 cm的碳储量为102.01 t/hm2,为植被层的1.82倍。山白兰人工林乔木层年净固碳量为3.50 t/（hm2.年）。[结论]山白兰人工林生态系统碳储量比较可观,具有较好的发展前景。

The Carbon Storage Amount and Spatial Distribution Characteristics of Paramichelia bailonii Plantations

[Objective]The study aimed to reveal the spactial distribution characteristics and laws for the carbon storage amount of Paramichelia bailonii plantations so as to provide the basic data for the estimation on the carbon storage amount of forest ecological system and also to provide the scientific reference for the forestation project of plantation carbon sink.[Method] With 27-year-old P.bailonii plantations in the southern subtropical region as the studied object,the biomass and the carbon content distribution of the plantations were analyzed by using the standard wood method and quadrat harvest method etc.[Result]The carbon storage in the ecosystem of P.bailonii plantation was 158.21 t/hm2,in which,the arbor layer counted for 87.24% of the total vegetation carbon storage,the bush layer counted for 10.77%,the herbal layer counted for 0.18% and the litter layer counted for 1.81%.The carbon storage in soil layer at 0-80 cm depth was 102.01 t/hm2,being 1.82 times of that in the vegetation layer.The net carbon fixation amount in the arbor layer of P.bailonii plantation was 3.49 t/hm2·a.[Conclusion]The carbon storage amount in the ecological system of P.bailonii plantation was greater and had better development prospects.