Using radiation thermography and thermometry to evaluate crop water stress in soybean and cotton

Publication year: 2011
Source: Agricultural Water Management, In Press, Corrected Proof, Available online 15 June 2011

S.A., O’Shaughnessy , S.R., Evett , P.D., Colaizzi , T.A., Howell

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 1.5m) were applied by a center pivot system to soybean (Glycine max L.) in 2004 and 2005, and to…

 Highlights: ► In this study we demonstrate how an empirical crop water stress index was related to in situ stress measurements. ► Average seasonal empirical CWSI values were inversely related to crop water use and crop yield. ► Contour plots of the average seasonal CWSI can be used to map spatial variability of within-field crop water stress.