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2025 , Vol. 48 >Issue 1: 94 - 104

DOI: https://doi.org/10.12118/j.issn.1000-6060.2024.125

土壤生态

黑河下游胡杨林土壤碳空间分异特征及其影响因素

  • 殷一丹 ,
  • 鱼腾飞 ,
  • 韩拓 ,
  • 谭天逸 ,
  • 陈小玲
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  • 1.中国科学院西北生态环境资源研究院，甘肃 兰州 730000
    2.中国科学院大学，北京 100049
    3.中国科学院西北生态环境资源研究院干旱区生态安全与可持续发展重点实验室，甘肃 兰州 730000
    4.中国科学院西北生态环境资源研究院阿拉善荒漠生态水文试验研究站，甘肃 兰州 730000
    5.额济纳旗林业和草原局，内蒙古 阿拉善 737300
殷一丹（2000-），女，硕士研究生，主要从事干旱区碳循环方面的研究. E-mail: yinyidan@nieer.ac.cn
鱼腾飞（1987-），男，副研究员，主要从事干旱区生态水文和生态恢复方面的研究. E-mail: yutf@lzb.ac.cn

收稿日期: 2024-02-28

  修回日期: 2024-05-21

  网络出版日期: 2025-01-21

基金资助

阿拉善盟科技计划项目(AMTM2022-2);内蒙古自治区关键技术攻关项目(2020GG0306)

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Spatial differentiation and its influencing factors of soil carbon in Populus euphratica Oliv. forest in the lower reach of Heihe River

  • YIN Yidan ,
  • YU Tengfei ,
  • HAN Tuo ,
  • TAN Tianyi ,
  • CHEN Xiaoling
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  • 1. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China
    4. Alxa Desert Eco-Hydrology Experimental Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China
    5. Ejin Banner Forestry and Grassland Bureau, Alagxa 737300, Inner Mongolia, China

Received date: 2024-02-28

  Revised date: 2024-05-21

  Online published: 2025-01-21

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摘要

荒漠河岸林土壤碳的分布受到多重因素的影响。以黑河下游额济纳绿洲为研究区域，通过采集20个胡杨林样地0~100 cm土层土壤样品，研究了土壤有机碳（SOC）、土壤无机碳（SIC）的空间分异特征及其影响因素。结果表明：（1） 0~100 cm SOC和SIC均值分别为2.90 g·kg-1和10.79 g·kg-1，SIC为SOC的3.72倍。（2） 垂直方向上SOC和SIC随土壤深度增加而减少，水平方向上从东河上段至下段SOC与SIC虽然均呈现减少趋势，但SIC总量仍大于SOC，说明SIC是干旱区内陆河下游土壤碳的主要赋存形式。（3） 土壤理化性质对SOC的解释程度较高，而对SIC的解释程度较低。其中，土壤化学性质（EC、Na+、SO42-、Cl-、Ca2+、Mg2+、K+）对SOC的影响程度最大。综上，黑河流域下游荒漠河岸林土壤碳库是以SIC为主，且在水平和垂直方向存在明显的空间分异，土壤理化性质对SOC和SIC空间分异的影响存在差异。其中，碱性阳离子是影响SOC的主要因素，而土壤砂粒含量和容重是影响SIC的主要因素。

关键词： 河岸胡杨林; 土壤碳; 分布特征; 影响因素; 黑河流域

本文引用格式

殷一丹 , 鱼腾飞 , 韩拓 , 谭天逸 , 陈小玲 . 黑河下游胡杨林土壤碳空间分异特征及其影响因素[J]. 干旱区地理, 2025 , 48(1) : 94 -104 . DOI: 10.12118/j.issn.1000-6060.2024.125

Abstract

The distribution of soil carbon in desert riparian forests is shaped by multiple factors. This study examines the Ejina Oasis in the lower reaches of the Heihe River, China. Soil samples from 20 Populus euphratica Oliv. plots at depths of 0-100 cm were analyzed to investigate the spatial variation of soil organic carbon (SOC) and soil inorganic carbon (SIC) and their influencing factors. The results reveal: (1) The mean SOC and SIC contents in the 0-100 cm soil layer were 2.90 g·kg-1 and 10.79 g·kg-1, respectively, with SIC being 3.72 times of SOC. (2) Vertically, both SOC and SIC contents exhibited a declining trend with increasing soil depth, while horizontally, SOC and SIC from the upper to lower sections of East River of the Heihe River show a decreasing trend, but the total amount of SIC is still greater than SOC. This suggests that inorganic carbon predominates in the lower reaches of inland rivers in arid regions. (3) Soil physical and chemical properties showed a stronger explanatory power for SOC, whereas their influence on SIC was comparatively lower. Specifically, soil chemical properties such as electrical conductivity (EC), sodium ion (Na+), sulfate (SO42-), chloride ion (Cl-), calcium ion (Ca2+), magnesium ion (Mg2+), and potassium ion (K+) had the most significant influence on SOC. In conclusion, the soil carbon pool in desert riparian forests in the lower reaches of inland river basins in arid areas is predominantly composed of SIC, with notable spatial variations in both horizontal and vertical directions. Basic cations are identified as the primary factor influencing SOC spatial differentiation, while soil sand content and bulk density are the key factors affecting SIC spatial differentiation.

Key words： riparian Populus euphratica Oliv. forest; soil carbon; distribution characteristics; influencing factor; Heihe River Basin

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