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  • CN 62-1070/P
  • ISSN 1000-694X
  • 双月刊 创刊于1981年
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生物与土壤

毛乌素沙地南缘不同活性沙丘土壤水分时空变化

  • 伍永秋 ,
  • 张健枫 ,
  • 杜世松 ,
  • 哈斯额尔敦 ,
  • 黄文敏
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  • 1. 北京师范大学防沙治沙教育部工程研究中心/地表过程与资源生态国家重点实验室, 北京 100875;
    2. 北京师范大学资源学院, 北京 100875
伍永秋(1963-),男,四川江安人,博士,教授,主要从事环境演变和土壤侵蚀研究。Email:yqwu@bnu.edu.cn

收稿日期: 2014-07-23

  修回日期: 2014-09-30

  网络出版日期: 2015-11-20

基金资助

国家自然科学基金项目(41330748);国家科技支撑计划课题(2012BAD16B0202)

Temporal and Spatial Variation of Soil Moisture in Dunes with Different Vegetation Coverage in Southern Margin of the Mu Us Sandy Land

  • Wu Yongqiu ,
  • Zhang Jianfeng ,
  • Du Shisong ,
  • Hasi Eerdun ,
  • Huang Wenmin
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  • 1. MOE Engineering Center of Desertification and Blown-sand Control at Beijing Normal University/State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China;
    2. College of Resources Science & Technology, Beijing Normal University, Beijing 100875, China

Received date: 2014-07-23

  Revised date: 2014-09-30

  Online published: 2015-11-20

摘要

以毛乌素沙地南缘风沙活动区典型的不同活性沙丘(流动沙丘、半流动沙丘、固定沙丘)为研究对象,于2011、2012年4-10月,每月2次,利用烘干法对3种沙丘迎风坡、丘顶、背风坡底部的0~100 cm深度土壤水分进行定位监测,分析了3种沙丘土壤水分时空变化特征。结果表明:土壤水分含量总体表现为固定沙丘>半流动沙丘>流动沙丘。3种沙丘平均土壤水分含量大体上都表现为秋季 >春季 >夏季。3种沙丘背风坡底部土壤水分含量最高,其次是迎风坡,丘顶最低,且迎风坡和丘顶两年平均土壤水分含量差距不大。表层0~10 cm土壤水分含量季节之间差异最大,随深度增加,土壤水分季节变异系数减小。沙丘各部位土壤水分含量垂直变异系数总体变化趋势为从春季到夏季增加,从夏季到秋季减小。土壤水分含量在0~100 cm的垂直变异系数与土壤水分含量为负相关关系,水分含量越高,土壤水分在0~100 cm之间的变化幅度越小。研究区3种沙丘土壤含水量变化水分可分为4个时期:4-5月为春季缓慢积累期,6-8月为夏季消耗期,9-11月为秋季积累期,12月到次年3月为冬季稳定期。总体上,天然植被对水分的涵养效果大于其消耗,本区降水可以维持不同活性沙丘的天然植被生长。

本文引用格式

伍永秋 , 张健枫 , 杜世松 , 哈斯额尔敦 , 黄文敏 . 毛乌素沙地南缘不同活性沙丘土壤水分时空变化[J]. 中国沙漠, 2015 , 35(6) : 1612 -1619 . DOI: 10.7522/j.issn.1000-694X.2014.00157

Abstract

This research is focused on three types of sand dunes(shifting dune, semi-shifting dune and fixed dune) that are typical to the southern borderline of the Mu Us Sandy Land. Soil moisture was measured for samples from a variety of depths ranging from 0 to 100 cm and from representative locations such as the windward slope, the dune top and the leeward slope. The sampling was conducted from April through October, twice a month, in both 2011 and 2012. The characteristics of the spatial-temporal variation of the soil moisture were established:the overall soil moisture of the three types of sand dunes demonstrates a pattern of fixed dune >semi-shifting dune >shifting dune. Seasonally, average soil moisture of each type of the sand dunes shows the same pattern of autumn >spring >summer. For all the three types of sand dunes, the soil moisture at different locations maintain the following pattern:the leeward slope near dune bottom >the windward slope >the dune top, while the average moisture levels at the windward slope and the dune top are quantitatively close during the two years under study. In terms of temporal variation, soil moisture at 0-10 cm depth exhibits the largest seasonal fluctuation, and shows a diminishing variation with greater depths. Vertical variation of the soil moisture in the sand dune increases from spring to summer, and then decreases from summer to autumn. Along the 0-100 cm depth, vertical variation of the soil moisture is in a negative correlation with the soil moisture level:higher overall soil moisture, lower the vertical variation. Four distinct periodical phases of soil moisture can be identified for the three types of sand dunes in the region:April and May is the spring slow accumulation phase, June to August is the summer depleting phase, September to November is the autumn accumulation phase, and December to March is the winter stable phase. Overall, natural vegetation conserves more than consumes the moisture, and precipitation in the region is able to sustain the natural vegetation on the different types of sand dunes.

参考文献

[1] 刘新平,张铜会,赵哈林,等.干旱半干旱区沙漠化土地水分动态研究进展[J].水土保持研究,2005,12(1):63-68.
[2] 李禄军,蒋志荣,车克钧,等.绿洲-荒漠交错带不同沙丘土壤水分时空动态变化规律[J].水土保持学报,2007,21(1):123-127.
[3] 潘颜霞,王新平.荒漠人工植被区浅层土壤水分空间变化特征分析[J].中国沙漠,2007,27(2):250-256.
[4] 王军,傅伯杰.黄土丘陵小流域土地利用结构对土壤水分时空分布的影响[J].地理学报,2000,55(1):84-91.
[5] 何其华,何永华,包维楷.干旱半干旱区山地土壤水分动态变化[J].山地学报,2003(2):149-156.
[6] 陈全胜,李凌浩,韩兴国,等.典型温带草原群落土壤呼吸温度敏感性与土壤水分的关系[J].生态学报,2004(4):831-836.
[7] 李新荣,马凤云,龙立群,等.沙坡头地区固沙植被土壤水分动态研究[J].中国沙漠,2001(3):3-8.
[8] 吕贻忠,胡克林,李保国.毛乌素沙地不同沙丘土壤水分的时空变异[J].土壤学报,2006(1):152-154.
[9] 张友焱,周泽福,程金花,等.毛乌素沙地不同沙丘部位几种灌木地土壤水分动态[J].东北农业大学学报,2010,41(6):73-78.
[10] 崔利强,吴波,杨文斌,等.毛乌素沙地东南缘不同植被盖度下土壤水分特征分析[J].干旱区资源与环境,2010(2):177-182.
[11] 郭柯,董学军,刘志茂.毛乌素沙地沙丘土壤含水量特点——兼论老固定沙地上油蒿衰退原因[J].植物生态学报,2000(3):275-279.
[12] 符超峰,赵景波.毛乌素沙地东南缘不同类型沙丘土壤水分分布特征[J].干旱区研究,2011(3):377-383.
[13] 石莎,冯金朝,邹学勇.不同地形条件对沙漠植物生长和沙地土壤水分的影响[J].干旱区地理,2007,30(6):846-851.
[14] 王志,王蕾,刘连友,等.毛乌素沙地南缘沙丘水分的时空分布特征[J].干旱区研究,2007,24(1):61-65.
[15] Entin J K,Robock A,Vinnikov K Y,et al.Temporal and spatial scales of observed soil moisture variations in the extratropics[J].Journal of Geophysical Research:Atmospheres(1984-2012),2000,105(D9):11865-11877.
[16] 邓辉,舒时光,宋豫秦,等.明代以来毛乌素沙地流沙分布南界的变化[J].科学通报,2007(21):2556-2563.
[17] 张新时.毛乌素沙地的生态背景及其草地建设的原则与优化模式[J].植物生态学报,1994(1):1-16.
[18] 杨梅焕,朱志梅,曹明明,等.毛乌素沙地东南缘不同沙漠化阶段土壤-植被关系研究[J].西北农林科技大学学报(自然科学版),2010,38(5):181-187.
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