桂西南尾巨桉中龄林生态系统碳储量及其分布格局  

Carbon Storage and Distribution of Middle-aged Eucalyptus urophylla ×E.grandis Plantation Ecosystem in Southwest Guangxi

作　　者：卢开成 张明慧 李春宁 何斌[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：《安徽农业科学》2016年第12期171-173,共3页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(31160152;31560206);广西大学;广西国有派阳山林场重大科技合作项目(2013-3-8)

摘　　要：[目的]评价桂西南尾巨桉人工林生态系统固碳能力和生态效益。[方法]采用标准样地法对广西宁明县4年生尾巨桉人工林的碳含量、碳储量及其空间分布格局进行研究。[结果]尾巨桉不同器官碳含量范围为454.80~478.50 g/kg,各器官碳含量从大到小依次为干材、树叶、干皮、树枝、树根。灌木层、草本层和凋落物层碳含量分别为463.50、442.70和453.40 g/kg。0~80 cm厚土层碳含量为8.89 g/kg,其中表土层（0~20 cm厚）的碳含量明显高于其他土层。尾巨桉中龄林生态系统碳储量为156.27 t/hm2,其中乔木层为46.02t/hm2,占29.44%;灌木层为0.86 t/hm2,占0.55%;草本层为0.74 t/hm2,占0.47%;凋落物层为3.30 t/hm2,占2.11%;土壤层为105.35t/hm2,占67.42%。尾巨桉人工乔木层林年净生产力为24.30 t/（hm2·a）,年净固碳量为11.50 t/（hm2·a）,折合CO2量为42.17t/（hm2·a）。[结论]桂西南尾巨桉人工林具有较强的碳吸存能力。[Objective]To evaluate carbon sequestration ability and ecological benefits of Eucalyptus urophylla × E.grandis plantation in southwest Guangxi.[Method] Standard plot method was taken to study the content,storage and distribution of carbon in 4-year-old E.urophylla × E.grandis plantation in Ningming County of Guangxi Province.[Result] The carbon content in different organs of E.urophylla × E.grandis trees ranged from 454.80 g / kg to 478.50 g / kg,which was in order as follow：stem 〉leaf〉 bark〉 branch 〉root.The carbon content in shrub,herb,litter floor were 463.50,442.70 and 453.40 g / kg,respectively.Carbon content in the soil（0-80 cm） was 8.89 g / kg,of which the carbon content of the topsoil（0-20 cm） was significantly higher than the other layers.The total carbon storage in E.urophylla × E.grandis plantation ecosystems amounted to 156.27 t / hm2,of which overstorey of E.urophylla × E.grandis trees stored 46.02 t/hm2 and accounted for 29.44%,and shrub layer stored 0.86 t / hm2 and accounted for 0.55%,herb layer plant stored 0.74 t / hm2 and accounted for 0.47%,litter floor plant stored 3.30 t / hm2 and accounted for 2.11%,and soil stored 105.35 t / hm2 and accounted for 67.42%.The annual net productivity of E.urophylla × E.grandis trees was 24.30 t /（hm2·a）,and annual net carbon fixation was up to 11.50 t/（hm2·a）,amounted CO2 to 42.17 t /（hm2·a）.[Conclusion]The E.urophylla × E.grandis plantation in southwest Guangxi has a high capability in carbon sequestration.

关 键 词：尾巨桉 中龄林 碳含量 碳储量 碳分配 

分 类 号：S718.55[农业科学—林学]