A Combined Frequency Domain and Tensiometer Sensor for Determining Soil Water Characteristic Curves
A Combined Frequency Domain and Tensiometer Sensor for Determining Soil Water Characteristic Curves
复制标题
DOI：
10.2136/sssaj2009.0047n
复制
发表时间：
2010-03
影响因子：
2.9
通讯作者：
Yurui Sun;Shujuan Ren;T. Ren;B. Minasny
中科院分区：
文献类型：
--
作者：
Yurui Sun;Shujuan Ren;T. Ren;B. Minasny
人们对开发一种能够同时测量土壤基质势和含水量以快速确定土壤水特征曲线的技术越来越感兴趣。在这项研究中，我们开发了一种新型组合土壤水分和电位传感器。新传感器将传统充水张力计的不锈钢管改造成单个传感电极，用于测量土壤含水量。这种新颖设计的优点是利用张力计的整个长度，而无需向传感器添加额外的组件。为了验证其可行性，该传感器在实验室条件下干燥的三种土壤（沙土、砂壤土和粘壤土）上进行了测试，以产生0至-80 kPa基质势范围内的土壤水分特征曲线。还使用标准实验室技术（张力表和压力板）获得了三种土壤的水特征曲线。结果表明，新传感器测量的三种土壤的水特征曲线与使用标准方法获得的水特征曲线非常吻合。
There is increasing interest in the development of a technique that can simultaneously measure soil matric potential and water content for rapidly determining a soil water characteristic curve. In this study, we developed a new combined soil water content and potential sensor. The new sensor adapted the stainless steel tube of a conventional water-filled tensiometer into a single sensing electrode for measuring soil water content. This novel design has the advantage of utilizing the whole length of the tensiometer without adding additional components to the sensor. To verify its feasibility, the sensor was tested on three soils (sand, sandy loam, and clay loam) while they were drying under laboratory conditions to produce the soil water characteristic curves in the matric potential range of 0 to -80 kPa. Water characteristic curves of the three soils were also obtained using standard laboratory techniques (tension table and pressure plate). The results show that water characteristic curves of the three soils from the new sensor are in good agreement with those obtained using the standard methods.