干旱区研究

干旱区研究 >

2018 , Vol. 35 >Issue 6: 1308 - 1316

DOI: https://doi.org/10.13866/j.azr.2018.06.07

水土资源

荒漠草原不同类型土壤水分时空变化特征

  • 苏莹 ,
  • 陈林 ,
  • 李月飞 ,
  • 杨新国 ,
  • 张义凡 ,
  • 杨东东 ,
  • 朱林
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  • 1.宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏 银川 750021;
    2.宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏 银川 750021;
    3.宁夏大学西部生态与生物资源开发联合研究中心,宁夏 银川 750021
苏莹(1993-),女,硕士研究生,主要从事植物生态学研究. E-mail: suying2246@163.com
朱林. E-mail: zhulinscience@126.com

收稿日期: 2018-05-15

  修回日期: 2018-05-23

  网络出版日期: 2025-11-18

基金资助

国家自然科学基金项目(31460123,31460161,41461046);宁夏大学研究生创新项目(GIP2018070);宁夏自然科学基金(2018AAC03037,NZ17005,NZ1623);宁夏高等学校一流学科建设(生态学)资助项目(NXYLXK2017B06)

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Spatiotemporal Variation of Moisture Content of Different Soil Types in Desert Steppe

  • SU Ying ,
  • CHEN Lin ,
  • LI Yue-fei ,
  • YANG Xin-guo ,
  • ZHANG Yi-fan ,
  • YANG Dong-dong ,
  • ZHU Lin
Expand
  • 1. Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education, Yinchuan 750021, Ningxia,China;
    2. Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration of Northwestern China, Yinchuan 750021, Ningxia,China;
    3. Union Research Center for Ecology and Exploitation of Biological Resources in Western China, Ningxia University, Yinchuan, 750021,Ningxia,China

Received date: 2018-05-15

  Revised date: 2018-05-23

  Online published: 2025-11-18

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摘要

为研究荒漠草原区不同土壤类型的水分时空动态变化特征及其对降雨变化的响应。选择3种土壤类型——风沙土、风化基岩残积土和灰钙土,利用野外增减雨试验装置,对土壤水分进行长期的动态监测。结果表明:风沙土、风化基岩残积土和灰钙土的土壤体积含水率时间变化受降雨的影响显著,出现了3次波峰;降雨量的增减变化会影响波峰出现的早晚。土壤体积含水率的垂直变化主要有2种类型:波动型和降低型,其主要受地表植被及土壤物理性质的影响。风沙土和风化基岩残积土的正常和减雨区,变异系数由表层(活跃层)向深层递减;灰钙土表层的土壤体积含水率变异系数最小(正常区1.21%,增雨区1.36%,减雨区1.46%),属次活跃层。正常和增雨区的总土壤蓄水量表现为:风化基岩残积土＞风沙土＞灰钙土,而减雨区的总蓄水量为:风化基岩残积土＞灰钙土＞风沙土。

关键词： 荒漠草原; 土壤水分; 降雨变化; 土壤类型; 宁夏

本文引用格式

苏莹 , 陈林 , 李月飞 , 杨新国 , 张义凡 , 杨东东 , 朱林 . 荒漠草原不同类型土壤水分时空变化特征[J]. 干旱区研究, 2018 , 35(6) : 1308 -1316 . DOI: 10.13866/j.azr.2018.06.07

Abstract

Three soil types including sandy soil, residual soil of weathered bedrock and sierozem were used to equip a device of controlling rainfall, record soil moisture content by an installed American HOBOU 30, and monitor the long-term dynamic change of soil moisture content. The purposes of this study were to research the spatial and temporal dynamic changes of moisture content of different soil types in desert steppe and its response to precipitation variation. The results showed that the temporal variation of volumetric moisture content of sand soil, residual soil of weathered bedrock and sierozem were affected by rainfall, and three peak values occurred. Rainfall change affected the peak values to appear sooner or later. There were two major types of vertical change of soil volumetric moisture content, i.e. the fluctuation type and reduction type. They were mainly affected by surface vegetation and soil physical properties. The variation coefficients under the normal situation and the rain-reduced treatment of sandy soil and residual soil of weathered bedrock were decreased from the surface to the deeper layer. The variation coefficients of volumetric moisture content of sierozem were 1.21%, 1.36% and 1.46% under the normal situation, rain-increased treatment and rain-reduced treatment respectively. Under the normal situation and rain-increased treatment, the total soil water storage was in an order of residual soil of weathered bedrock>sandy soil>sierozem; under the rain-reduced treatment, however, it was in an order of residual soil of weathered bedrock>sierozem>sandy soil.

Key words： desert steppe; soil moisture content; precipitation variation; soil type; Ningxia

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