Engenharia Agrícola | |
Measurement systems of soil water matric potential and evaluation of soil moisture under different irrigation depths | |
José M. G. Beraldo2  José E. Cora1  Edemo J. Fernandes1  | |
[1] ,Instituto Federal de Educação, Ciência e Tecnologia de São PauloMatão SP | |
关键词: tensiometer; digital tensiometer; neutron attenuation technique; tensiômetro; tensímetro digital; técnica de moderação de nêutrons; | |
DOI : 10.1590/S0100-69162012000300006 | |
来源: SciELO | |
【 摘 要 】
The development of new methodologies and tools that enable to determine the water content in soil is of fundamental importance to the practice of irrigation. The objective of this study was to evaluate soil matric potential using mercury tensiometer and puncture digital tensiometer, and to compare the gravimetric soil moisture values obtained by tensiometric system with gravimetric soil moisture obtained by neutron attenuation technique. Four experimental plots were maintained with different soil moisture by irrigation. Three repetitions of each type of tensiometer were installed at 0.20 m depth. Based on the soil matric potential and the soil water retention curve, the corresponding gravimetric soil moisture was determined. The data was then compared to those obtained by neutron attenuation technique. The results showed that both tensiometric methods showed no difference under soil matric potential higher than -40 kPa. However, under drier soil, when the water was replaced by irrigation, the soil matric potential of the puncture digital tensiometer was less than those of the mercury tensiometer.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
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RO202005130067931ZK.pdf | 302KB | download |