南亚热带米老排成熟林碳库及其分布格局  

Carbon Stock and Distribution of Mature Mytilaria laosensis Plantation in South Sub-tropical Area

作　　者：周弘愿 庞赞松 何斌[2] 廖倩苑[2] 李春宁 李远航[2] 舒凡[2] 刘俊[2] 

机构地区：[1]广西国有派阳山林场,广西宁明532500 [2]广西大学林学院,广西南宁530004

出　　处：《福建林业科技》2015年第3期45-49,共5页Journal of Fujian Forestry Science and Technology

基　　金：广西"十一五"林业科技项目(桂林科字2009[08]);国家自然科学基金项目(31160152)

摘　　要：以南亚热带地区广西宁明县米老排成熟林（34年生）为研究对象，采用标准样地法对其碳库及其分布格局进行研究。结果表明：①米老排不同器官碳素含量在472.6～509.3 g· kg^－1之间，各器官碳素含量排序依次为树叶、干材、干皮、树枝、树根。灌木层、草本层、凋落物层碳素含量分别为480.4、469.1、483.2 g· kg^－1。土壤（0～100 cm）土层中碳素含量为8.94 g· kg^－1，随土层加深土壤中碳素含量逐渐减少。②米老排人工林生态系统碳库为272.80 t· hm^－2，其中乔木层为143.47 t· hm^－2，占52.59％；灌木层为0.44 t· hm^－2，占0.18％；草本层为0.18 t· hm^－2，占0.07％；凋落物层为5.07 t· hm^－2，占1.86％；土壤层为123.64 t· hm^－2，占45.32％。③米老排成熟林年净生产力为10.17 t· hm^－2· a^－1，碳素年净固定量为5.37 t· hm^－2· a^－1，折合成CO2的量为19.69 t· hm^－2· a^－1。The standard plot method was used to study the carbon stock and distribution of mature M.laosensis plantation（34-year-old） in Ningming County of Guangxi,China.The results showed that carbon content in different organs of M.laosensis ranged from 472.6 g· kg-1 to 509.3 g· kg-1 and was in the order as：leaf〉stem〉bark〉branch〉root.The carbon content in shrub layer, herb layer and litter floor were 480.4 g· kg-1 ,469.1 g· kg-1 and 483.2 g· kg-1 respectively.Carbon content in the soil（0~100 cm） was 8.94 g · kg-1 and declined with soil depth.The total carbon stock in M.laosensis plantation ecosystems amounted to 272.80 t· hm-2 ,of which over-storey of M.laosensis stored 143.47 t· hm^-2 and accounted for 52.59%,the shrub layer stored 0.44 t· hm^-2 and accounted for 0.18%, the herb layer stored 0.18 t· hm-2 and accounted for 0.07%, the litter floor Stored 5.07 t· hm^-2 and accounted for 1.86%, and the soil stored 123.64 t· hm^-2 and accounted for 45.32%.The annual net productivity of M.laosensis trees was 10.17 t· hm^-2 · a^-1 ,and annual net carbon fixation was up to 5.37 t· hm^-2 · a^-1 ,amounted CO2 to 19.69 t· hm^-2 · a^-1 .

关 键 词：米老排 成熟林 碳库 碳分配 

分 类 号：S718.55[农业科学—林学]