Calibration equations for Diviner 2000 capacitance measurements of volumetric soil water content in salt-affected soils | |
Department | 环境材料与生态化学研究发展中心 |
Anna Tedeschi1; Huang, Cui Hua2; Zong L(宗莉)3; You, Quan Gang2; Xue, Xian2 | |
2014 | |
Source Publication | Soil Research |
ISSN | 1838-675X |
Volume | 52Issue:4Pages:379-387 |
Abstract | The capacitance sensor Diviner 2000 was used in an open field to monitor the volumetric soil water content (θν) in the Minqin Oasis of Northwest China. The objectives of the work were to evaluate the accuracy of the factory calibration equation; to obtain a soil-specific calibration as a linear and a power equation with both a saline and a tapwater reference; and to obtain a general equation for multiple soil layers. Calibration was done during an irrigation experiment by using water with different salinities. The soil was characterised by different salinities and textures across the plots and soil layers. The calibration was carried out using water of the same salinity and composition as the local irrigation water. This procedure would yield a better normalisation of the scaled frequency (SF) for each irrigation treatment. For the treatments under study, the accuracy of the factory calibration equation was not good (range of the root mean square error, RMSE: 0.048–0.171 cm3 cm–3). The accuracy of the soil-specific field calibration was higher. We therefore concluded that a soil-specific calibration is necessary. The RMSE shows no difference for the calibration equation with either tap or saline water reference. The linear and power equations, determined with a tap and saline water reference for each treatment and layer, gave larger differences in θν, Δθν, at high SF than at low SF values. The Δθv values increased with increasing salinity, i.e. from the control to the most saline water irrigation treatment. The linear equation had a significantly different slope for the 0.3–0.6 m layer, which has higher clay content. Pooling in a single equation of the data from multiple layers and/or treatments was satisfactory for the 0.3–0.6 m layer of the treatments W2 and W5, with RMSE of 0.026, with the higher clay content. |
Keyword | Capacitance Sensor Soil Texture Saline Water Salinity Volumetric Soil Water Content |
Subject Area | 环境材料与生态化学 |
DOI | 10.1071/SR13172 |
Funding Organization | the National Research Council and by the Chinese Academy of Science under their bilateral cooperation agreement for the periods 2004-2007 and 2008-2010;the CNR Short Term Mobility program for the period 2007-2008;the NSFC (41301615) |
Indexed By | SCI |
If | 1.320 |
Language | 英语 |
Funding Project | 功能复合材料组 |
compositor | 第三作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/18133 |
Collection | 环境材料与生态化学研究发展中心 |
Corresponding Author | Anna Tedeschi |
Affiliation | 1.Natl Res Council Italy, Inst Agr & Forestry Syst Mediterranean, CNR ISAFOM, I-80056 Naples, Italy 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, Res & Dev Ctr Ecomat & Ecochem, Lanzhou 730000, Peoples R China |
Recommended Citation GB/T 7714 | Anna Tedeschi,Huang, Cui Hua,Zong L,et al. Calibration equations for Diviner 2000 capacitance measurements of volumetric soil water content in salt-affected soils[J]. Soil Research,2014,52(4):379-387. |
APA | Anna Tedeschi,Huang, Cui Hua,Zong L,You, Quan Gang,&Xue, Xian.(2014).Calibration equations for Diviner 2000 capacitance measurements of volumetric soil water content in salt-affected soils.Soil Research,52(4),379-387. |
MLA | Anna Tedeschi,et al."Calibration equations for Diviner 2000 capacitance measurements of volumetric soil water content in salt-affected soils".Soil Research 52.4(2014):379-387. |
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