华北落叶松幼中龄林的生物量与碳汇功能  

Biomass and Carbon Sequestration Functions of Larix principis-rupprechtii Young and Middle-Aged Plantations

作　　者：张田田[1] 马履一[1] 贾忠奎[1] 刘杰[1] 游伟斌[1] 

机构地区：[1]省部共建森林培育与保护教育部重点实验室(北京林业大学),北京100083

出　　处：《东北林业大学学报》2012年第12期32-35,39,共5页Journal of Northeast Forestry University

基　　金：林业公益性行业科研专项经费项目(201004021);中央高校基本科研业务费专项资金(BLJD200904)资助

摘　　要：以华北落叶松为研究对象,通过样地调查,测定林分乔木层、灌木草本层、凋落物层的生物量,并运用重铬酸钾氧化法测定各组分的含碳率,对华北落叶松幼中龄林的生物量生产力、生物量转换因子、碳密度等进行了研究。结果表明:华北落叶松幼中龄林的生物量转换因子值在0.541 4～0.807 5之间变动,平均值为0.656 9。18、22、38年生华北落叶松林乔木层地上总生物量分别为70.16、83.79、173.3 t/hm2,其中干材所占比例最大,灌木草本层的生物量为5.15、4.57、46.44 t/hm2,凋落物层的生物量为33.70、28.76、28.57 t/hm2。华北落叶松林乔木层、灌木草本层、凋落物层的平均碳密度分别为71.220 0、9.529 5、15.433 6 t/hm2。A study was conducted to determine the biomass of tree layer, shrub and herb layer and litter layer in Lar/x principisrupprechtii young and middle-aged plantations based on the data of sample plot survey. The productivity, biomass expansion factor and carbon density of L. principis-rupprechtii plantations were analyzed according to the organic carbon ration of each layer determined by potassium dichromate oxidation titration. Results show that biomass expansion factor of L. principis-rupprechtii young and middle-aged plantations ranged from 0.541 4 to 0.807 5, with an average of 0.6569. The above- ground biomasses of tree layer in 8-, 22-, and 38-year-old plantations were 70.16, 83.79 , and 173.3 t/hm2, and trunk wood accounted for the largest proportion of biomass ; the biomasses of shrub and herb layer were 5.15, 4.57, and 46.44 t/hm2 ; the biomasses of litter layer were 33.70, 28.76, and 28.57 t/hm2, respectively. The carbon densities of tree layer, shrub and herb layer, and litter layer in L. principis-rupprechtii plantations were 71. 220 0, 9.529 5, and 15. 433 6 t/ hm2, respectively.

关 键 词：生物量 生产力 碳密度 华北落叶松 

分 类 号：S718[农业科学—林学]