摘要
对广西来宾市维都林场36年生顶果木人工林生态系统碳含量、碳密度及其分配格局进行了研究。结果表明,乔木层不同器官平均碳含量为501.7g/kg,介于483.40~516.95g/kg之间,表现为:树叶〉树干〉根兜〉粗根〉枯枝〉中根〉鲜枝〉细根〉树皮;生态系统碳密度为554.89t·c/hm^2,其中乔木层和土壤层为主要的碳库,分别为406.60t·c/hm^2、143.72t·c/hm^2;不同层次表现为乔木层(占总量73.28%)〉土壤层(25.90%)〉灌木层(0.55%)〉凋落物层(0.25%)〉草本层(0.02%)。顶果木年净固碳量为32.18t·c/(hm^2·a),净碳素累积量为11.29t·c/(hm^2·a),具有很高的固碳能力。
The carbon content, accumulation and distribution of 36-year-old standing forest of Acrocarpus fraxinifo- lius plantation ecosystem was studied in Guangxi State-owned Weidu Forestry Farm, Laibin City. The results showed that the average carbon content in different organs of the tree layer was 501.7 g/kg, ranged from 483.40 g/kg to 516. 95 g/kg, with the order of leaf 〉trunk 〉root tip〉coarse root〉dead branch〉middle root〉flesh branch〉 fine root〉bark. The total carbon density in Acrocarpus fraxinifolius plantation ecosystem was 554. 89 t·c/hm^2, tree layer and soil layer were the main carbon pool, both reached 406. 60 t · c/hm^2, 143.72 t · c/hm^2, respec- tively ; different gradations showed tree layer (account for 73.28 % of the total) 〉soil layer (25.90 % ) 〉shrub lay- er (0. 55 % ) 〉litter layer (0. 25 % ) 〉herb layer (0. 02 % ). The annual carbon fixation of Acrocarpusfraxinifoli- us plantation was 32. 18 t · c/ (hm^2 · a), and net carbon accumulation was 11.29 t · c / (hm^2 · a), being relat- ed with high carbon sequestration ability.
出处
《西部林业科学》
CAS
2015年第4期137-141,共5页
Journal of West China Forestry Science
基金
国家自然科学资金项目<赤红壤区粘土矿物及铁铝氧化物对土壤有机碳的稳定机制>(31260121)
广西林业科技项目<珍贵树种顶果木人工林综合技术研究>(桂林科字[2013]第19号)
关键词
顶果木
人工林
碳含量
碳密度
分配格局
Acrocarpus fraxinifolius
plantation
carbon content
carbon density
distribution pattern