自然资源学报 ›› 2018, Vol. 33 ›› Issue (6): 1056-1067.doi: 10.31497/zrzyxb.20170436

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土地利用方式下土壤有机碳特征及影响因素——以后寨河喀斯特小流域为例

黄先飞1, 2, 周运超1, 3, *, 张珍明1   

  1. 1. 贵州大学 a. 贵州省森林资源与环境研究中心, b. 林学院, 贵阳 550025;
    2. 贵州师范大学省山地环境重点实验室, 贵阳 550001;
    3. 贵州普定喀斯特生态系统观测研究站,贵州 普定 562100
  • 收稿日期:2017-05-10 修回日期:2018-01-19 出版日期:2018-06-28 发布日期:2018-06-28
  • 作者简介:黄先飞(1983- ),男,博士,助理研究员,主要从事环境科学研究。E-mail: hxfswjs@gznu.edu.cn
  • 基金资助:

    国家重大科学研究计划项目(2013CB956702); 贵州省科技计划项目(黔科合[J]字2014-2002-03); 贵州省百层次人才计划项目(2015-4022)

Characteristics and Affecting Factors of Soil Organic Carbon under Land Uses: A Case Study in Houzhai River Basin

HUANG Xian-fei1, 2, ZHOU Yun-chao1, 3, ZHANG Zhen-ming1   

  1. 1. a. Institute for Forest Resources & Environment of Guizhou, b. College of Forestry, Guizhou University, Guiyang 550025, China;
    2. Guizhou Provincial Key Laboratory for Environment, Guizhou Normal University, Guiyang 550001, China;
    3. Puding Karst Ecosystem Research Station of Guizhou Province, Puding 562100, China
  • Received:2017-05-10 Revised:2018-01-19 Online:2018-06-28 Published:2018-06-28
  • Supported by:

    National Key Research Program of China, No. 2013CB956702; the Great Basic Research Fund of Guizhou Province, No. QKH-JZ-2014-200203; the 100 High Level Innovating Project, No. QKHRC-2015-4022). ]

摘要:

为研究喀斯特小流域土壤有机碳空间分布与土地利用之间的关系,基于网格法在后寨河流域挖掘了2 755个土壤剖面,并采集了22 057个土壤样品。分析了后寨河流域不同土地利用方式下土壤有机碳密度特征。结果表明:后寨河流域土壤有机碳密度主要受人为干扰、土壤厚度与岩石裸露率的制约。不同利用方式土壤有机碳密度(0~100 cm)总体上呈现以下规律:水田>旱地>经果林地>园地>草地>弃耕地>坡耕地>乔灌木林地>乔木林地>荒地>灌木林地>灌草地。后寨河流域100 cm土壤有机碳平均碳密度为8.70 kg/m2,低于中国土壤有机碳平均密度10.83 kg/m2,总有机碳储量为5.39×108 kg。科学合理地进行土地利用方式调整与管理,可以增大喀斯特小流域土壤有机碳储量。

关键词: 后寨河流域, 喀斯特小流域, 土壤有机碳, 用地方式

Abstract:

To study the relationship between the spatial distribution characteristics of soil organic carbon (SOC) and land use in karst river basins, 22 057 soil samples from 2 755 soil profiles were collected with a grid-sampling method at a 150 m scale in the Houzhai River Basin. The SOC density characteristics under different land uses were analyzed. The results indicate that human disturbance, soil thickness and rock outcrop are critical factors to SOC density in the Houzhai River Basin. The land uses in the Houzhai River Basin with SOC density (0-100 cm) in descended order are paddy lands, arid lands, artificial fruit forestlands, garden lands, grasslands, abandoned lands, sloping croplands, arbor-shrub mixed forestlands, arbor forestlands, uncultivated lands, shrub lands and shrub-grass lands. The average SOC density in the top 1 m soil of Houzhai River Basin is 8.70 kg/m2 which is a little lower than the average SOC density in China (10.83 kg/m2), and the SOC storage in the Houzhai River Basin is 5.39×108 kg. In conclusion, scientific and reasonable rearrangement and management of land uses could enlarge the SOC storage capacity in a karst river basin.

Key words: Houzhai River Basin, karst basin, land use, soil organic carbon

中图分类号: 

  • S153.6