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青冈栎混交林生物量及碳储量分布特征 预览

Distribution Features of Biomass and Carbon Storage in Cyclobalanpsis glauca Mixed Forest
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摘要 以湖南永顺43年生青冈栎混交林为研究对象,采用平均木法和样方收获法测定乔木层生物量和林下植被层生物量,采用重铬酸钾—水合加热法测定样品碳素含量,对林分各组分的生物量和碳储量分布特征进行研究。结果表明:青冈栎混交林单位面积生物量为320.03t/hm^2,各组分单位面积生物量由大到小的排列顺序为乔木层、枯落物层、灌木层和草本层。林分单位面积碳储量高达389.43t/hm^2,其中植被层和土壤层分别为249.02,140.41t/hm^2。林分内青冈栎、栲树和杉木单株平均蓄积分别为0.1561,0.2912,0.2960m^3,单株平均碳储量分别为103.85,99.15,97.90kg。青冈栎属于生长速度较慢但木材密度大的树种,单株平均蓄积仅有栲树和杉木的单株平均蓄积的1/2左右,但其单株平均生物量和碳储量却比栲树和杉木的单株平均生物量和碳储量要高,表明树种碳汇能力的高低并不完全取决于树种生长速度的快慢,这对今后生态公益林树种的选择提供了一个新的方向。 The distribution features of biomass and carbon storage of 43-year-old Cyclobalanpsis glauca mixed forest in Yongshun county,Hunan province,were studied.The biomass of tree layer and under-storey was measured by the average standard method and plot harvest method,and carbon contents by potassium dichromate-hydration heating method.The results showed that biomass per unit area of the mixed forest was 320.03 t/hm^2.The order of biomass per unit area from large to small was tree layer,litter layer,shrub layer and herb layer.Carbon storage per unit area of the mixed forest was 389.43 t/hm^2,which included vegetation layer (249.02 t/hm^2) and soil layer (140.41 t/hm^2).As increasing of soil depth,the carbon storage decreased.The average volumes per plant of Cyclobalanpsis glauca,Castanopsis fargesii and Cunninghamia lanceolata were 0.156 1,0.291 2 and 0.296 0 m^3 respectively,while the average carbon storages per plant were 103.85,99.15 and 97.90 kg respectively.Cyclobalanpsis glauca was slow-growing woody species with large wood density,its average individual volume was only half of Castanopsis fargesii ’s and Cunninghamia lanceolata ’s,but both its average biomass per plant and average carbon storage per plant were higher than the latter two.It showed that the ability of carbon sequestration of tree species wasn’t entirely determined by the growth rate.This finding provided a new option of tree species for ecological forest.
作者 林立彬 李铁华 杨柳 LIN Libin;LI Tiehua;YANG Liu(College of Forestry,Central South University of Forestry and Technology School of Forestry,Changsha 410004)
出处 《水土保持学报》 CSCD 北大核心 2019年第1期139-144,共6页 Journal of Soil and Water Conservation
基金 国家公益性行业科研专项(201504301).
关键词 青冈栎混交林 生物量 碳储量 树种选择 Cyclobalanpsis glauca mixed forest biomass carbon storage choice of tree species
作者简介 第一作者:林立彬(1993-),男,硕士研究生,主要从事森林培育研究。E-mail:812843284@qq.com;通信作者:李铁华(1964-),男,博士,教授,主要从事森林培育及水土保持研究。E-mail:1273284580@qq.com
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