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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (31): 9-13.doi: 10.11924/j.issn.1000-6850.2014-0713

所属专题： 农业地理

• 林学 园艺 园林 • 上一篇    下一篇

内陆沙区丘间地土壤水分时空变化分析

杜娟,刘淑娟   

  1. 甘肃省治沙研究所/甘肃省荒漠化与风沙灾害防治国家重点实验室培育基地,甘肃省治沙研究所
  • 收稿日期:2014-03-17 修回日期:2014-03-17 接受日期:2014-09-30 出版日期:2014-11-20 发布日期:2014-11-20
  • 通讯作者: 刘淑娟
  • 基金资助:
    甘肃省自然科学基金(096RJZH015)；国家自然基金项目“石羊河尾闾（青土湖）水面形成的生态效应研究”(31160116)、“人为干预下石羊河下游地下水动态变化及生态效应研究”(1260129)、“干旱内陆沙区丘间地植被生态过程及其驱动机制”(31460223)。

The Temporal and Spatial Variation Analysis of Soil Moisture of Interdune Lowland in Inland Sandy Areas

  • Received:2014-03-17 Revised:2014-03-17 Accepted:2014-09-30 Online:2014-11-20 Published:2014-11-20

摘要： 土壤水分是沙漠沙生植物成活和生长的最主要因子，不同的地形类型下土壤水分空间分布差异明显。利用智能中子水分仪定时测定土壤水分的方法，测定并分析了巴丹吉林沙漠东南缘不同地形下0~200 cm深土壤共10 个层次的水分时空变化特征。结果表明：巴丹吉林沙漠东南缘土壤水分空间分布具有一定规律性，土壤水分丘间地下部＞丘间地中部＞丘间地上部＞沙丘上中下部，沙丘上中下部的年季变化不大，总体处于平稳状态；丘间地土壤水分变化较其他地形大，春季土壤水分不是很丰富，土壤水分波动不大；夏季受植物生长、太阳蒸腾和降雨的影响，土壤水分时空变化差异明显，20 cm以上水分增多，40~180 cm表现为水分变化活跃层；秋季水分整体含量增加。巴丹吉林沙漠东南缘不同地形下土壤水分时空变化研究为大规模的沙漠生态平衡治理、生态系统人工修复以及沙区可持续发展等提供了科学的依据。

关键词: 生理指标, 生理指标

Abstract: Soil moisture is the most important factor for the survival and growth of desert psammophytes. Under different types of terrain, spatial distribution of soil moisture has significant differences. Using smart neutron moisture meter timing measurement of soil moisture, different terrain 0-200 cm deep soil moisture of 10 levels of spatial and temporal variation characteristics were measured and analyzed in southeast edge of Badain Jaran desert. The results showed that: soil moisture spatial distribution of the southeastern margin of the Badain Jaran desert had a certain regularity: lower interdune lowland＞middle interdune lowland＞upper interdunal lowland＞the upper, middle and lower of dunes. And the annual variability of sand dune was overall in a steady state; soil moisture of interdune lowland changed than other terrain. In spring, soil moisture was not very rich, soil moisture had little fluctuations; In summer, plant growth were limited by transpiration and rainfall, there was significant differences of temporal and spatial variation of soil moisture, soil moisture above 20 cm increased and 40-180 cm were the active layer of the performance of moisture of change; moisture content increased in the overall fall. The southeast edge of the Badain Jaran desert soil moisture temporal and spatial variation in topography study provided a scientific basis for the massive desert ecological balance governance, ecosystem artificial restoration and sandy areas of sustainable development.