作 者：
何斌;余春和;王安武;李就鹏;陈玉萍;荣薏
关键词：
厚荚相思人工林;碳素含量;碳贮量;碳分配
摘 要：
对7年生厚荚相思人工林生态系统的碳素含量、贮量及其空间分布特征进行了研究。结果表明:厚荚相思不同器官碳素含量为470.1~533.8 g/kg,排序从大到小依次为树叶、树枝、树干、树根、树皮。灌木层、草本层和凋落物层碳素含量分别为465.4、425.7和478.3 g/kg。土壤(0~80 cm)平均碳素含量为12.94 g/kg,随土层深度的增加,各层次土壤碳素含量逐渐减少。厚荚相思人工林生态系统总碳贮量为141.05 t/hm2,其中乔木层为46.97 t/hm2,占整个生态系统碳贮量的33.30%;灌草层为2.07 t/hm2,占1.47%;凋落物层为4.49 t/hm2,占3.18%;林地土壤(0~80 cm)为92.01 t/hm2,占65.23%。厚荚相思各器官碳贮量与其生物量成正比例关系,树干的碳贮量最高,占乔木层碳贮量的52.20%,树枝、树叶、树皮和树根等碳贮量共占乔木层的47.80%。7年生厚荚相思人工林乔木层年净生产力为20.06 t/(hm2.a),碳素年净固定量为9.86 t/(hm2.a)。
译 名：
Carbon storage and distribution in Acacia crassicarpa plantation ecosystem
作 者：
HE Bin1,YU Chun-he2,WANG An-wu2,LI Jiu-peng2,CHEN Yu-ping1,RONG Yi1(1.Forestry College of Guangxi University,Nanning 530004,China;2.Qipo Forest Farm of Guangxi,Nanning 530225,China)
关键词：
Acacia crassicarpa plantation;carbon content;carbon storage;carbon distribution
摘 要：
The content,storage and distribution of carbon in 7-year-old Acacia crassicarpa plantation ecosystem were studied.The results showed that carbon content in different organs of A.crassicarpa trees ranged from 470.1 g/kg to 533.8 g/kg,and decreased in the order of leaf>branch>stem>root>bark.The carbon content in shrub,herb and litter floor were 465.4 g/kg,425.7 g/kg and 478.3 g/kg,respectively.Carbon content in the soil(0—80 cm) was 12.94 g/kg and declines with soil depth.The total carbon storage in A.crassicarpa plantation ecosystems amounted to 141.05 t/hm2,of which over-storey of A.crassicarpa stored 46.97 t/hm2 and accounted for 33.30%,and under-storey plant stored 2.07 t/hm2 and accounted for 1.47%,and litter floor stored 4.49 t/hm2 and accounted for 3.18%,and soil stored 92.01 t/hm2 and accounted for 65.23%.The carbon storage in different organs was positively related to the biomass of corresponding organs.Stem accumulated the highest carbon storage,comprised 52.20% of carbon storage in overstory trees,the rest in branch,leaf,bark and root,etc.,seized 47.80%.The annual net productivity of 7-year-old A.crassicarpa plantation was 20.06 t/(hm2·a) and annual carbon fixation was up to 9.86 t/(hm2·a).
