Establishing crop water stress index (CWSI) threshold values for early, non-contact detection of plant water stress

Murat Kacira, Peter P. Ling, Ted H. Short

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

Early, non-contact, non-destructive, and quantitative detection of plant water stress with the application of infrared thermometry using a crop water stress index (CWSI) was established. A CWSI model for plants grown under controlled environments was developed using thermodynamic principles and energy balance of the plant. CWSI threshold values were established with a parametric approach. The effectiveness of the sensing technique was evaluated using timing of the stress detection by a grower. The CWSI-based technique was able to detect the stress one to two days prior to the time of stress detection by visual observation. Overall results of this study suggested that pre-visual and non-contact detection of plant water stress with infrared thermometry application using CWSI is feasible.

Original languageEnglish (US)
Pages (from-to)775-780
Number of pages6
JournalTransactions of the American Society of Agricultural Engineers
Volume45
Issue number3
StatePublished - May 1 2002
Externally publishedYes

Keywords

  • CWSI
  • Drought stress
  • Infrared thermometry
  • Irrigation management
  • Plant monitoring

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)

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