桂中喀斯特地区油茶人工林碳储量及碳密度研究  

Study on Carbon Storage and Carbon Density of Camellia oleifera Plantation in Karst Area of Central Guangxi

作　　者：卢德波 LU De-bo(Guangxi State-owned Weidu Forest Farm,Laibin,Guangxi 546100)

机构地区：[1]广西壮族自治区国有维都林场,广西来宾546100

出　　处：《园艺与种苗》2024年第7期34-36,91,共4页Horticulture & Seed

摘　　要：[目的]研究桂中喀斯特地区不同林龄油茶人工林碳储量及碳密度特征,为进一步挖掘和利用广西油茶树种碳汇功能提供科学参考。[方法]以广西不同林龄软枝油茶(Camellia oleifera)人工林为研究对象,采用空间代替时间方式,对不同林分乔木层、凋落物层、灌木层、草本层碳含量和碳储量占比进行比较,研究其分配规律。[结果]不同林龄油茶林乔木层各组分碳含量差异显著,6年生(幼林期)、12年生(中林期)、20年生(成熟林期)油茶林乔木层碳含量分别为20.77、32.67、56.29 g/kg。乔木层各组成部分碳含量均随着林龄的增加而增加。20年生油茶林乔木层树干部分碳密度达到38.08 t/hm^(2)。6年生、12年生、20年生油茶林林下层碳含量平均值分别为8.45、9.95、15.84 g/kg,林分总碳储量分别为8.49、27.30、54.84 t/hm^(2)。[结论]乔木层碳含量及碳密度在不同林龄阶段均为最高。不同林龄林分中,林分总碳储量及乔木层碳储量随林龄的增加而增加,乔木层碳储量为油茶林分碳储量的主体部分,其碳储量所占比例达到总碳储量的45%以上。[Objective]The aim was to study the characteristics of carbon storage and carbon density of Camellia oleifera plantations of different forest ages in the karst region of central Guangxi,and provide scientific reference for further exploring and utilizing the carbon sink function of C.oleifera tree species in Guangxi.[Method]Taking C.oleifera plantations of different ages in Guangxi as the research object,the carbon content and carbon storage ratio of tree layer,litter layer,shrub layer and herb layer in different stands were compared using a spatial instead of temporal approach to study their distribution rules.[Result]There were significant differences in the carbon content of each component in the tree layer of C.oleifera forests of different ages.The carbon content in the tree layer of the 6-year-old(young forest),12-year-old(middle forest),and 20-year-old(mature forest)C.oleifera forests was 20.77,32.67,and 56.29 g/kg,respectively.The carbon content of each component of the tree layer increases with the increase of forest age.The carbon density in the trunk of the tree layer of the 20-year-old C.oleifera forest reached 38.08 t/hm^(2).The average carbon content in the lower layer of the 6-year-old,12-year-old,and 20-year-old C.oleifera forest is 8.45,9.95,and 15.84 g/kg,respectively.The total carbon storage of 6-year-old,12-year-old,and 20-year-old C.oleifera stands was 8.49,27.30,and 54.84 t/hm^(2),respectively.[Conclusion]The carbon content and carbon density of the tree layer were the highest at different forest age stages.In different forest age stands,the total carbon storage and tree layer carbon storage increased with the increase of forest age,and the tree layer carbon storage was the main part of the carbon storage of C.oleifera forest.Its carbon storage accounted for over 45%of the total carbon storage.

关 键 词：软枝油茶 碳储量 碳密度 分配 

分 类 号：S718.5[农业科学—林学]