Field studies on irrigated grain sorghum (Sorghum bicolor L. Moench) crops were conducted in California for three years to evaluate the use of thermal infrared measurements to estimate water use and detect crop stress. These studies were conducted on a Yolo loam soil with different rooting volumes to limit the water availability. Data show that the stress-degree-day index (midday comparison of canopy-air temperature differences) provides a valid indicator of crop stress, and that the canopy-air temperature difference increases rapidly above zero when more than 65% of the available water is depleted. The canopy-air temperature difference is also related to leaf-water potential, with an increase above zero when the potential decreases below − 1.1 MPa (=11 bars). Improvement of the performance of the stress-degree-day index through compensation for environmental variability was achieved by including measurements of the plant water stress which are related to available water extracted. It is concluded that remote sensing of emitted thermal radiation offers a promising technique which can be incorporated into irrigation management programs.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
Clawson KL, Blad BL (1982) Infrared thermometry for scheduling irrigations of corn. Agron J 74:311
Ehrler WL, Idso SB, Jackson RD, Reginato RJ (1978) Wheat canopy temperatures: Relation to plant water potential. Agron J 70:251
Gardner BW, Blad BL, Watts DG (1981 a) Plant and air temperatures in differentiallyirrigated corn. Agric Meteorol 25:207
Gardner BR, Blad BL, Garrity DP, Watts DG (1981 b) Relationships between crop temperature, grain yield; evapotranspiration and phenological development in two hybrids of moisture stressed sorghum. Irrig Sci 2:213
Geiser DM, Slack DC, Allred ER, Stange, KW (1982) Irrigation scheduling using crop canopy-air temperature difference. Trans. ASAE 25:689.
Hatfield JL, Millard JP, Reginato RJ, Jackson RD, Idso SB, Pinter PJ Jr, Goettleman RC (1980) Spatial variability of surface temperature as related to cropping practice with implications for irrigation management. Proc. 14th ERIM Symposium on Remote Sensing of Environment. pp 1311–1320
Idso SB, Jackson RD, Pinter PJ Jr, Reginato RJ, Hatfield JL (1981 a) Normalizing the stressdegree-day parameter for environmental variability. Agric Meteorol 24:45
Idso SB, Reicosky DC, Reginato RJ, Hatfield JL (1981b) Determining soil-induced plant water potential depressions in alfalfa by means of infrared thermometry. Agron J 73:826
Jackson RD (1981) Soil moisture inferences from thermal infrared measurement of vegetation tempertures. 1981 International Geoscience and Remote Sensing Symposium. pp 364–374
Jackson RD, Reginato RJ, Idso SB (1977) Wheat canopy temperatures: A practical tool for evaluating water requirements. Water Resources Res 13:651
Jackson RD, Idso SB, Reginto RJ, Pinter PJ Jr (1980) Remotely sensed crop temperatures and reflectances as inputs to irrigation scheduling. Proc Spec Conf on Irrig and Drainage ASCE. pp 390–397
Jackson RD, Idso SB, Reginato RJ, Pinter PJ Jr (1981) Canopy temperature as a crop water stress indicator. Water Resources Res 17:1133
Kanemasu ET, Heilman JL, Bagley JO, Powers WL (1977) Using Landsat data to estimate evapotranspiration of winter wheat. Environ Manag 1:515
Walker GK, Hatfield JL (1979) Test of the stress-degree-day concept using multiple planting dates of red kidney beans. Agron J 71:967
Contribution from the California Agricultural Experiment Station Project 3963. Research partially supported by Water Resources Grant UCAL-W-574 and USDA-Broadform Agreement 12-14-5001-17BF
About this article
Cite this article
Hatfield, J.L. The utilization of thermal infrared radiation measurements from grain sorghum crops as a method of assessing their irrigation requirements. Irrig Sci 3, 259–268 (1983). https://doi.org/10.1007/BF00272841
- Thermal Radiation
- Infrared Radiation
- Radiation Measurement
- Environmental Variability
- Sorghum Bicolor