桂东南火力楠人工林生态系统碳储量及其分布格局  

Carbon Storage and Distribution of Michelia macclurei Plantation Ecosystem in Southeast Guangxi

作　　者：滕秋梅 何斌[1] 梁添富 覃俊 刘俊[1] 

机构地区：[1]广西大学林学院,南宁530004 [2]广西环江县洛阳镇贵阳市花溪区马铃乡林业站

出　　处：《农业研究与应用》2016年第4期7-11,共5页Agricultural Research and Application

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

摘　　要：本文采用样地测定方法对广西容县31年生火力楠人工林的碳素含量、储量及其空间分布格局开展了研究。结果表明:1火力楠不同器官碳素含量为433.9~466.0 g/kg,各器官碳素含量排序从大到小依次为树叶、树枝、干材、干皮、树根,灌草层碳素含量为452.6 g/kg,凋落物层为418.2 g/kg。0~100 cm土层碳素含量为13.22 g/kg,其中表土层(0~20 cm)的碳素含量(28.53g/kg)明显高于其他土层。2火力楠人工林生态系统碳储量为279.24 t/hm^2,其中乔木层为95.08t/hm^2,占34.04%,灌草层为0.81 t/hm^2,占0.29%;凋落物层为1.99 t/hm^2,占0.71%;土壤层为181.37 t/hm^2,占64.95%。331年生火力楠人工林乔木层年净生产力为9.70 t/hm^2,年净固碳量为4.44 t/hm^2,折合成CO_2的量为16.28 t/hm^2。This paper studies the content, storage and distribution of carbon in 31-year-old Michelia macclurei plantation in Rongxian, Guangxi by sample plots measurement method. The results showed that （1） carbon content in different organs ofMichelia macclurei trees ranged from 433.9 g/kg to 466.0 g/kg, which was in order as follow： leaf〉branch〉stem〉bark〉root. The carbon content in the shrub-grass layer and litter layer were 452.6 g/kg and 418.2 g/kg respectively, in the soil （0~100cm） was 13.22 g/kg, and in the topsoil （0 - 20 cm） was significantly higher than that in the other layers. （2） The total carbon storage in M. macclurei plantation ecosystem amounted to 279.24 t/hm^2, of which the overstorey of M. macclurei trees stored 95.08 t/hm^2 and accounted for 34.04%, the under-storey plant stored 0.81 t/hm^2 and accounted for 0.29%, the litter floor stored 1.99 t/hm^2 and accounted for 0.71%, and the soil stored 181.37 t/hm^2 and accounted for 64.95%. （3） The annual net productivity of M. macclurei trees was 9.70 t/hm^2, and annual net carbon fixation was 4.44 t/hm^2 which converted into COL was 16.28 t/（hm^2· a）.

关 键 词：火力楠 人工林 碳素含量 碳储量 碳分配 

分 类 号：S718.5[农业科学—林学]