Estimation of soil water deficit in an irrigated cotton field with infrared thermography

Phadi, J., Misra, R.K. and Payero, J.O. (2012) Estimation of soil water deficit in an irrigated cotton field with infrared thermography. Field Crops Research, 126 1: 45-55.


Author Phadi, J.
Misra, R.K.
Payero, J.O.
Title Estimation of soil water deficit in an irrigated cotton field with infrared thermography
Journal name Field Crops Research   Check publisher's open access policy
ISSN 0378-4290
1872-6852
Publication date 2012-02-14
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.fcr.2011.09.015
Volume 126
Issue 1
Start page 45
End page 55
Total pages 11
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2012
Language eng
Abstract Plant growth and soil water deficit can vary spatially and temporally in crop fields due to variation in soil properties and/or irrigation and crop management factors. We conducted field experiments with cotton (Gossypium hirsutum L.) over two seasons during 2007-2009 to test if infrared thermography can distinguish systematic variation in deficit irrigation applied to various parts of the field over time. Soil water content was measured with a neutron probe and thermal images of crop plants were taken with a thermal infrared camera. Leaf water potential and stomatal conductance were also measured on selected occasions. All measurements were made at fixed locations within three replicate plots of an irrigation experiment consisting of four soil-water deficit treatments. Canopy temperature related as well with soil water within the root zone of cotton as the stomatal conductance index derived from canopy temperature, but it neglected the effect of local and seasonal variation in environmental conditions. Similarities in the pattern of spatial variation in canopy temperature and soil water over the experimental field indicates that thermography can be used with stomatal conductance index to assess soil water deficit in cotton fields for scheduling of irrigation and to apply water in areas within the field where it is most needed to reduce water deficit stress to the crop. Further confidence with application of infrared thermography can be gained by testing our measurement approach and analysis with irrigation scheduling of other crops.
Keyword Canopy temperature
Irrigation
Leaf water potential
Soil water deficit
Stomatal conductance
Stomatal conductance index
Thermal imagery
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Queensland Alliance for Agriculture and Food Innovation
 
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Created: Thu, 20 Oct 2011, 13:22:32 EST by Dr Jose Payero Rodriguez on behalf of Qld Alliance for Agriculture and Food Innovation