猫儿山自然保护区不同林分类型土壤有机碳储量及其剖面分配特征  

Soil Carbon Storage and Vertical Distribution Characteristics of Different Stand Types in Maoershan Nature Reserve

作　　者：朱柳霏 戴艳花 黎立港 吴滢 宋贤冲[1,2,4] 王会利 覃祚玉[1,2,4] 谭一波 邓小军[1,2,3,4] ZHU Liu-fei;DAI Yan-hua;LI Li-gang;WU Ying;SONG Xian-chong;WANG Hui-li;QIN Zuo-yu;TAN Yi-bo;DENG Xiao-jun(Guangxi Forestry Research Institute,Key Laboratory of Central South Fast-growing Timber Cultivation of National Forestry and Grassland Administration,Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning 530002,China;Guangxi Lijiang River Source Forest Ecosystem Research Station,Guilin Xingan Lijiangyuan Forest Ecosystem Observation and Research Station of Guangxi,Guilin 541316,China;Guangxi State-owned Bobai Forest Farm,Yulin 537600,China;Guangxi Research and Development Center for New Forestry Fertilizer,Nanning 530002,China)

机构地区：[1]广西壮族自治区林业科学研究院国家林业局中南速生材繁育实验室广西优良用材林资源培育重点实验室,广西南宁530002 [2]广西漓江源森林生态系统国家定位观测研究站桂林兴安漓江源森林生态系统广西野外科学观测研究站,广西桂林541316 [3]广西国有博白林场,广西玉林537600 [4]广西林用新型肥料研发中心,广西南宁530002

出　　处：《土壤通报》2024年第4期968-973,共6页Chinese Journal of Soil Science

基　　金：广西自然科学基金项目(2022GXNSFBA035630);广西林业科技项目(桂林科研[2021]22号);广西优良用材林资源培育重点实验室项目(2019-A-04-02);广西重点研发项目(桂科AB1850011);中央财政林业科技推广示范项目([2023]TG10号)资助。

摘　　要：【目的】揭示猫儿山自然保护区3种不同林分类型土壤有机碳储量差异及其剖面垂直分布特征,为该区域林业碳汇发展提供科学理论依据。【方法】以猫儿山水青冈天然次生林、毛竹人工林、杉木人工林3种典型林分作为研究对象,采用野外调查结合室内分析的方法,测定并计算各林分土壤容重、有机碳含量、有机碳密度和有机碳储量,并根据各林分结果数据来分析不同林分土壤有机碳储量差异及其剖面垂直分布特征和占比规律。【结果】不同林分类型土壤有机碳含量、有机碳密度及有机碳储量均表现为:水青冈天然次生林>毛竹人工林>杉木人工林。不同土层土壤有机碳含量、有机碳密度及有机碳储量存在显著差异,且均随土层加深有机碳含量等指标降低。水青冈林分土壤总有机碳储量最高,为332.99 t hm^(-2);杉木林分土壤总有机碳储量最低,为225.27 t hm^(-2)。有机碳储量占比也是随土层加深而逐渐变小,土层越深,占比越小。【结论】水青冈天然次生林土壤有机碳储量高于毛竹人工林、杉木人工林,有较好的碳储量积累与固定效应。[Objective]The aim was to reveal the difference of soil organic carbon(SOC)storage,its vertical distribution characteristics and proportion rule of three different stand types in Maoershan Nature Reserve,in order to provide scientific theoretical basis for the development of forest carbon(C)sink in this area.[Methods]Soil bulk density,SOC content,organic C density and organic C storage were measured and calculated by field investigation combined with laboratory analysis in three typical stands of natural secondary forest,bamboo plantation and Chinese fir plantation in Maoershan.The difference of SOC storage in different stands and its vertical distribution and proportion were analyzed according to the result data of each stand.[Results]The SOC content,organic C density and organic C storage of different stand types were as follows:natural secondary forest>bamboo plantation>Chinese fir plantation.There were significant differences in SOC content,organic C density and storage in different soil layers,and the organic C content decreased with the deepening of soil layers.The soil total organic carbon(TOC)storage was the highest(332.99 t hm^(−2))in Prunus sylvata stand,and the lowest(225.27 t hm^(−2))in Chinese fir stand.The proportion of organic C storage gradually decreases with the deepening of the soil layer,and the deeper the soil layer,the smaller the proportion.[Conclusion]The SOC and C storage of natural secondary forest of Cyclobalsam sylvatica were higher than that of bamboo plantation and Chinese fir plantation,and had better C storage accumulation and fixation effect.

关 键 词：猫儿山 林分类型 土壤有机碳 有机碳储量 分配特征 

分 类 号：S714.8[农业科学—林学] S759.9