秦岭太白山森林表层土壤有机碳分布特征  

Distribution characteristics of forest surface soil organic carbon in Taibai Mountains of Qinling

作　　者：陈曦 张彦军[1] 邹俊亮 党维 鞠学良 于媛 CHEN Xi;ZHANG Yanjun;ZOU Junliang;DANG Wei;JU Xueliang;YU Yuan(Geography and Environmental Engineering Department,Baoji University of Arts and Sciences,Baoji,Shaanxi 721013,China;Beijing Research&Development Centre for Grass and Environment,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China;Shaanxi Miaosen Environmental Protection Technology Company Limited,Xi’an,Shaanxi 710000,China;Key Laboratory of State Grid Environmental Protection,State Grid Shaanxi FElectrie Power Rssearch Institute,Xi’an,Shaanxi 70000,China)

机构地区：[1]宝鸡文理学院地理与环境学院,陕西宝鸡721013 [2]北京市农林科学院北京草业与环境研究发展中心,北京100097 [3]陕西淼森环保科技有限公司,陕西西安710000 [4]国网陕西省电力公司电力科学研究院电网生态环境保护重点实验室,陕西西安710000

出　　处：《森林与环境学报》2022年第3期244-252,共9页Journal of Forest and Environment

基　　金：国家自然科学基金项目“土壤微生物群落结构调控太白红杉林凋落物呼吸温度敏感性的机理研究”(41801069);陕西省科技厅面上项目“坡向影响秦岭太白山锐齿栎林土壤呼吸的机理研究”(2022JM-113)。

摘　　要：为探明秦岭太白山森林表层(0~10 cm)土壤有机碳及活性碳组分(易氧化碳和水溶性碳)含量的海拔梯度分布特征,揭示其海拔梯度格局的影响因素,沿秦岭太白山北坡海拔每上升50 m设置1个标准样地,通过路径分析法确定其影响因素对土壤有机碳及活性碳组分的贡献。结果表明,土壤有机碳、易氧化碳和水溶性碳含量均呈现出随着海拔梯度的升高而升高的趋势;不同气候带上土壤有机碳、易氧化碳和水溶性碳含量差异显著,基本呈现出亚寒带>寒温带>温带>暖温带的趋势;植被带也是影响土壤有机碳、易氧化碳和水溶性碳含量的因素之一,基本呈现出高山草甸>高山针叶林>桦木林带>混交林带>锐齿栎>低山混交带的趋势;土壤有机碳、易氧化碳和水溶性碳含量的海拔梯度格局均与土壤温度、凋落物量、土壤容重和黏粒含量密切相关,土壤温度是重要因素。In order to explore the elevation gradient distribution characteristics of soil organic carbon and active carbon components(readily oxidizable carbon and dissolved carbon) in the forest surface(0-10 cm) of the Taibai Mountain in Qinling Mountains, and elucidate the influencing factors of the elevation gradient pattern, a standard sample plot was placed every 50 m along the northern slope of Taibai Mountain, and the contribution of influencing factors to the soil organic carbon and active carbon components was determined by path analysis. The results show that the soil organic carbon, dissolved carbon, and readily oxidizable carbon contents increased as the altitude increased. The soil organic carbon, dissolved carbon, and readily oxidizable carbon content were significantly different between various climate zones, with the greatest amount in the sub frigid zone, followed by the cold temperate, temperate, and warm temperate zones, respectively. Vegetation zone is also one of the factors affecting the soil organic carbon, dissolved carbon, and readily oxidizable carbon contents. It was observed that content was greatest at alpine meadow, followed by the alpine coniferous forest, birch forest belt, mixed forest belt, quercus acacia, and low mountain mixed belt, respectively. The content of soil organic carbon, readily oxidizable carbon and dissolved carbon are closely related to soil temperature, litter biomass, soil bulk density, and clay content.

关 键 词：秦岭太白山 土壤有机碳 海拔梯度 土壤活性碳 

分 类 号：S714.4[农业科学—林学]