文献类型：期刊文献

英文题名：In Situ Monitoring of Soil Bulk Density with a Thermo-TDR Sensor

作者：Liu, Xiaona[1] Lu, Sen[2] Horton, Robert[3] Ren, Tusheng[4]

第一作者：Liu, Xiaona

通信作者：Ren, TS[1]

机构：[1]Taiyuan Univ Sci & Technol, Coll Environm & Safety, Taiyuan 030000, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[3]Iowa State Univ, Dept Agron, Ames, IA 50010 USA;[4]China Agr Univ, Dept Soil & Water Sci, Beijing 100193, Peoples R China

年份：2014

卷号：78

期号：2

起止页码：400-407

外文期刊名：SOIL SCIENCE SOCIETY OF AMERICA JOURNAL

收录：;EI(收录号：20142417807543);Scopus(收录号：2-s2.0-84901806824);WOS:【SCI-EXPANDED(收录号:WOS:000334354400007)】；

基金：This work is supported by the High-tech Industrialization Program of Higher Education Institutions of Shanxi Province (No. 20110020), the Key Science and Technology Program of Shanxi Province (No. 20120313011-4), the Natural Science Foundation of China (41071155). Robert Horton acknowledges the funding of the High-end Foreign Experts Recruitment Program of China (GDW20121100041).

语种：英文

外文关键词：Silt - Textures

摘要：Monitoring spatial and temporal dynamics of soil bulk density (rho(b)) can be challenging, and ideally soil rho(b) measurements should be continuous in situ. The thermo-time domain reflectometry (TDR) technique is emerging as a useful technique for measuring soil rho(b), with the advantages of being automated, rapid, and minimally destructive. The objective of this study is to evaluate the effectiveness of the thermo-TDR technique for monitoring the temporal dynamics of soil rho(b) under field conditions. Thermo-TDR sensors were installed at two experimental sites with different soil textures, silt loam and sandy loam, to monitor soil rho(b) continuously in the 0- to 10- and 10- to 20-cm soil layers. The results showed that the thermo-TDR rho(b) in general agreed with gravimetric rho(b) from the core method, and the differences between the two methods were within 8%. Compared with the core method, the thermo-TDR technique had the advantage of capturing the in situ rho(b) changes over time with minimal soil disturbance. We conclude that the thermo-TDR sensors can be used effectively to continuously monitor soil rho(b) under field conditions.