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中国农学通报 ›› 2017, Vol. 33 ›› Issue (33): 127-134.doi: 10.11924/j.issn.1000-6850.casb17070141

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

利用盘式吸渗仪确定土壤水力学参数研究进展

石长春,樊军   

  1. 陕西省治沙研究所、陕西榆林毛乌素沙地生态系统国家定位观测研究站,西北农林科技大学水土保持研究所
  • 收稿日期:2017-07-28 修回日期:2017-08-18 接受日期:2017-08-24 出版日期:2017-11-27 发布日期:2017-11-27
  • 通讯作者: 石长春
  • 基金资助:
    国家自然科学基金“水蚀风蚀交错区灌草植被对降雨入渗过程的影响与模拟”(41571224)。

Field Hydraulics Parameters Measured by Disc Tension Infiltrometer: Research Progress

  • Received:2017-07-28 Revised:2017-08-18 Accepted:2017-08-24 Online:2017-11-27 Published:2017-11-27

摘要: 各种农业措施显著影响土壤的物理性质,特别是土壤水力学参数。随着计算机模型广泛用于土壤物质迁移的预测预报,准确确定土壤水力学参数成为一项重要的研究任务。盘式吸渗仪作为一种简便实用的仪器正被广泛用于田间土壤水力学参数的测定。国内外学者发展了稳态、瞬态和反推等方法,利用盘式吸渗仪来确定土壤近饱和导水率、吸渗率和水分特征曲线。同时该仪器可以用于田间测定土壤孔隙分布状况,以及两区模型中的参数。本文对国内外有关盘式吸渗仪研究从相关理论和应用方面进展进行了综述,并对田间测定操作中注意的问题进行评述,指导田间试验以获得准确的测定数据。盘式吸渗仪在田间测定土壤孔隙,特别是大孔隙流方面有独特的优点,但是其并未在中国不同质地土壤上得以广泛应用。

Abstract: Soil management has significant effect on physical properties, especially soil hydraulics parameters. The accurate measurement of soil hydraulics parameters has become an important research with computer model being widely used in the forecast of soil material migration. Disc tension infiltrometer as a simple and convenient instrument is widely used in soil hydraulics parameters measure. The researches at home andabroad studied the method of steady state, transient state and backstepping, and used disc tension infiltrometer to measure soil near saturated hydraulic conductivity, absorptivity and soil water retention curve. At the same time, this instrument could be used to measure soil pore distribution and the parameters in two-zone model. The authors summarized the research progress and application development of disc tension infiltrometer, and reviewed the problems in field operation to guide the field experiment to acquire more accurate data. Disc tension infiltrometer has advantages in soil pore measurement, especially in macropore, but its application in different soils in China is not wide.

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