Calibration and modification of impedance probe for near surface soil moisture measurements
Calibration and modification of impedance probe for near surface soil moisture measurements
复制标题
用于近地表土壤湿度测量的阻抗探头的校准和修改
DOI：
10.4141/s03-069
复制
发表时间：
2004
影响因子：
1.7
通讯作者：
H. Tewolde
中科院分区：
文献类型：
--
作者：
T. Tsegaye;W. Tadesse;T. Coleman;T. Jackson;H. Tewolde
目前还没有一种可靠且低成本的传感器可以测量土壤表面或附近的土壤湿度。本研究的目的是：（一）评估修改阻抗探头（IP），以测量土壤水分含量在一个非常浅的深度（2-5厘米）的可能性;和（二）比较使用IP获得的土壤水分值使用传统的重量法获得的值。这项研究是在Winfred A.亚拉巴马绿榛子的托马斯农业研究站。将能够测量6 cm土壤深度处土壤水分含量的标准IP修改为测量2 cm、3 cm和5 cm深度处的土壤水分。使用特定地点和深度的校准技术，它提供的结果与传统的重量含水量测定方案获得的值相当。该仪器对土壤含水量的变化非常敏感，具有很大的潜力，可以替代传统的土壤含水量测定仪。
A reliable and low cost sensor that can measure soil moisture at or near the soil surface is currently not available. The objectives of this study were: (i) to evaluate the possibility of modifying an impedance probe (IP) to measure soil moisture content at a very shallow depth (2–5 cm); and (ii) to compare the soil moisture values obtained using the IP to the values obtained using the traditional gravimetric method. The research was conducted at the Winfred A. Thomas Agricultural Research Station (WTARS) Hazel Green, Alabama. The standard IP that is capable of measuring soil moisture content at 6-cm soil depth was modified to measure soil moisture at 2-, 3-, and 5-cm depths. Using a site and depth-specific calibration technique it provided results that were comparable to the values that were obtained following the traditional gravimetric water content determination protocol. We found that the instrument was very sensitive to changes in soil moisture content and has great potential as a replacement for th...