Abstract
The features of the energy balance of a canopy relevant to infrared thermometry are presented. Results of a field experiment carried out with differentially water-stressed plots showed that changes of instantaneous horizontal wind speed (as measured with a modified three-cup anemometer) affect canopy temperature (CT) readings. This needs to be taken into consideration when using CT to monitor crop water status. The merits of various stress indices based on CT measurements are discussed. The difference in CT between plots was found to be well correlated with their respective leaf water potential or stomatal resistance differences. Comparison of the measured CT with that of a wellwatered reference plot was shown to provide a potentially reliable means of detecting crop water stress.
Original language | English |
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Pages (from-to) | 219-230 |
Number of pages | 12 |
Journal | Agricultural and Forest Meteorology |
Volume | 31 |
Issue number | 3-4 |
DOIs | |
State | Published - 1 Jan 1984 |
Externally published | Yes |
ASJC Scopus subject areas
- Forestry
- Global and Planetary Change
- Agronomy and Crop Science
- Atmospheric Science