摘要
对广西南丹山口林场速生阶段(11 a生)秃杉人工林的碳库与碳吸存进行了研究。结果表明,秃杉不同器官碳素含量为429.9～511.5 g/kg,各器官碳素含量排列顺序为树皮>树枝>树干>树根>树叶。草本层、灌木层和凋落物层平均碳素含量分别为452.9、407.7 g/kg和430.7 g/kg。土壤(0～80 cm)碳素含量为16.71 g/kg,随土层深度的增加各层次土壤碳素含量逐渐减少。秃杉人工林生态系统碳库为172.49 t/hm2,其中乔木层为39.06 t/hm2,占生态系统碳库的20.92%;灌草层为0.20 t/hm2,占0.12%;凋落物层为0.98 t/hm2,占0.57%;土壤层为135.22 t/hm2,占78.39%。秃杉各器官的碳库与其生物量成正比例关系,树干的生物量最大,其碳库也最大,占乔木层碳库的52.06%。速生阶段秃杉林年净生产力为8.62 t/(hm2.a),碳素年净固定量为4.06 t/(hm2.a)。
The carbon stock and carbon sequestration capacities in Taiwania flousiana plantation at fast growing stage（ 11-year-old） was studied in Nandan Shankou Forestry Farm of Guangxi,China. The results showed that car- bon content in different organs of T. flousiana ranged from 452. 3 g/kg to 511.5 g/kg, and was in the order as ： bark 〉 branch 〉 stem 〉 root 〉 leaf. The carbon content in shrub,herb and litter floor were 452. 9 g/kg,407.7 g/kg and 430.7 g/kg,respectively. Carbon content in the soil（0 -80 cm）was 16. 71 g/kg and declined with soil depth. The carbon stock in T. flousiana plantation ecosystem at fast growing stage was 172.49 t/hm2, divided among the tree layer with 36. 09 t/hm2 （20. 92 % ）, under-storey plant 0.20 t/hm2 （0. 12% ） ,litter 0. 98 t/hm2 （57%） , and soil （0-80 cm）135.22 t/hm2（78.39 % ）. The carbon stock in different organs was positively related to the biomass of corresponding organs. Stem accumulated the highest carbon stock and comprised 52.06% of carbon stock in tree layer. The annual net productivity of T.flousiana plantation at fast growing stage was 8.62 t/（ hm2 · a） ,annual net carbon fixation was up to 4.06 t/（ hm2 · a）.
出处
《山地学报》
CSCD
北大核心
2009年第4期427-432,共6页
Mountain Research
基金
广西自然科学基金资助项目(0640018)
广西"十五"林业科学研究项目(2001-27)~~
关键词
秃杉人工林
速生阶段
碳库
碳吸存
Taiwania flousiana plantation
fast growing stage
Carbon stock
Carbon sequestration
