南亚热带13年生大叶栎人工林固碳功能分析  

Analysis on carbon sequestration of 13-year-old Quercus griffithii plantation in south subtropical region

作　　者：叶家义 付军 陆卫勇 欧军 何斌[2] YE Jiayi;FU Jun;LU Weiyong;OU Jun;HE Bin(Guangxi State-owned Paiyangshan Forest Farm,Ningming,Guangxi 532500,China;College of Forestry,Guangxi University,Nanning,Guangxi 530004,China)

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：《亚热带农业研究》2023年第1期38-43,共6页Subtropical Agriculture Research

基　　金：国家自然科学基金项目(31560206,31760201);广西林业科技项目(桂林科字[2022ZC]第80号、第81号、第82号);广西大学与广西国有派阳山林场科技合作项目(2013-3-8)。

摘　　要：[目的]探究南亚热带大叶栎人工林碳汇功能,为其生态效益的合理评价和可持续经营提供依据。[方法]以广西宁明县13年生大叶栎人工林为研究对象,采用平均木法和样方收获法分别测定其乔木层、灌木层、草本层及凋落物层生物量,采用重铬酸钾容量法测定植物和土壤样品的碳含量,探讨大叶栎人工林生态系统生物量和碳储量及其分布格局。[结果](1)大叶栎人工林生态系统生物量为119.20 t·hm^(-2),其中乔木层、灌木层、草本层和凋落物层分别占92.57%、0.86%、0.60%和5.97%。(2)大叶栎人工林生态系统碳储量为164.26 t·hm^(-2),不同层次碳储量依次为:土壤层(109.62 t·hm^(-2))>乔木层(50.83 t·hm^(-2))>凋落物层(3.06 t·hm^(-2))>灌木层(0.45 t·hm^(-2))>草本层(0.30 t·hm^(-2))。(3)大叶栎人工林乔木层年净生产力为10.47 t·hm^(-2)·a^(-1),年净固碳量为4.85 t·hm^(-2)·a^(-1),年净吸收CO_(2)量为17.81 t·hm^(-2)·a^(-1)。[结论]大叶栎人工林具有较强的固碳功能,可作为南亚热带地区发展碳汇林的良好树种。[Purpose]Comprehending the carbon sequestration of Quercus griffithii plantation in south subtropical will provide a basis for the rational evaluation of its ecological benefits and sustainable management.[Method]A 13-year-old Q.griffithii plantation in Ningming County of Guangxi was chosen to determine the biomass of different layers(including arbor layer,shrub layer,herb layer and litter layer)using average wood method and plot harvesting method,and the carbon contents of different components and understory soils were determined by potassium dichromate volumetric method,based on which the biomass,carbon storage and distribution pattern of the ecosystem were studied.[Result](1)The biomass of Q.griffithii plantation ecosystem was 119.20 t·hm^(-2),in which the tree layer,shrub layer,herb layer and litter layer accounted for 92.57%,0.86%,0.60%and 5.97%,respectively.(2)The total carbon storage of Q.griffithii plantation ecosystem was estimated to be 164.26 t·hm^(-2),and the descending order of the carbon storage of each component in this ecosystem was soil layer(109.62 t·hm^(-2)),tree layer(50.83 t·hm^(-2)),litter layer(3.06 t·hm^(-2)),shrub layer(0.45 t·hm^(-2))and herb layer(0.30 t·hm^(-2)).(3)The annual net productivity of Q.griffithii plantation was 10.47 t·hm^(-2)·a^(-1),with annual carbon fixation and annual net CO_(2) absorption reaching 4.85 and 17.81 t·hm^(-2)·a^(-1),respectively.[Conclusion]Q.griffithii plantation has relatively high carbon fixation ability and is considered good tree species for developing carbon sink forests in south subtropical areas.

关 键 词：大叶栎 生物量 碳储量 南亚热带 

分 类 号：S792.39[农业科学—林木遗传育种]