Using radiation thermography and thermometry to evaluate crop water stress in soybean and cotton
The use of digital infrared thermography and thermometry to investigate early crop water stress offers a producer improved management tools to avoid yield declines or to deal with variability in crop water status. This study used canopy temperature data to investigate whether an empirical crop water stress index could be used to monitor spatial and temporal crop water stress. Different irrigation treatment amounts (100%, 67%, 33%, and 0% of full replenishment of soil water to field capacity to a depth of 1.5Â m) were applied by a center pivot system to soybean (Glycine max L.) in 2004 and 2005, and to cotton (Gossypium hirsutum L.) in 2007 and 2008. Canopy temperature data from infrared thermography were used to benchmark the relationship between an empirical crop water stress index (CWSIe) and leaf water potential ([Psi]L) across a block of eight treatment plots (of two replications). There was a significant negative linear correlation between midday [Psi]L measurements and the CWSIe after soil water differences due to irrigation treatments were well established and during the absence of heavy rainfall. Average seasonal CWSIe values calculated for each plot from temperature measurements made by infrared thermometer thermocouples mounted on a center pivot lateral were inversely related to crop water use with r2 values >0.89 and 0.55 for soybean and cotton, respectively. There was also a significant inverse relationship between the CWSIe and soybean yields in 2004 (r2Â =Â 0.88) and 2005 (r2Â =Â 0.83), and cotton in 2007 (r2Â =Â 0.78). The correlations were not significant in 2008 for cotton. Contour plots of the CWSIe may be used as maps to indicate the spatial variability of within-field crop water stress. These maps may be useful for irrigation scheduling or identifying areas within a field where water stress may impact crop water use and yield.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Falkenberg, Nyland R. & Piccinni, Giovanni & Cothren, J. Tom & Leskovar, Daniel I. & Rush, Charlie M., 2007. "Remote sensing of biotic and abiotic stress for irrigation management of cotton," Agricultural Water Management, Elsevier, vol. 87(1), pages 23-31, January.
- Jackson, Scott H., 1991. "Relationships between normalized leaf water potential and crop water stress index values for acala cotton," Agricultural Water Management, Elsevier, vol. 20(2), pages 109-118, November.
- Ben-Asher, J. & Phene, C. J. & Kinarti, A., 1992. "Canopy temperature to assess daily evapotranspiration and management of high frequency drip irrigation systems," Agricultural Water Management, Elsevier, vol. 22(4), pages 379-390, December.
- Dogan, Ergun & Kirnak, Halil & Copur, Osman, 2007. "Effect of seasonal water stress on soybean and site specific evaluation of CROPGRO-Soybean model under semi-arid climatic conditions," Agricultural Water Management, Elsevier, vol. 90(1-2), pages 56-62, May.
- O'Shaughnessy, S.A. & Evett, S.R., 2010. "Canopy temperature based system effectively schedules and controls center pivot irrigation of cotton," Agricultural Water Management, Elsevier, vol. 97(9), pages 1310-1316, September.
- Pinter, P. J. & Fry, K. E. & Guinn, G. & Mauney, J. R., 1983. "Infrared thermometry: A remote sensing technique for predicting yield in water-stressed cotton," Agricultural Water Management, Elsevier, vol. 6(4), pages 385-395, August.
When requesting a correction, please mention this item's handle: RePEc:eee:agiwat:v:98:y:2011:i:10:p:1523-1535. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Shamier, Wendy)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.