Summary
A field study was conducted on cotton (Gossypium hirsutum L. c.v. Acala SJ-2) to investigate the effects of soil salinity on the responses of stress indices derived from canopy temperature, leaf diffusion resistance and leaf water potential. The four salinity treatments used in this study were obtained by mixtures of aqueduct and well water to provide mean soil water electrical conductivities of 17, 27, 32 and 38 dS/m in the upper 0.6 m of soil profile. The study was conducted on a sandy loam saline-alkali soil in the lower San Joaquin Valley of California on 30 July 1981, when the soil profile was adequately irrigated to remove any interference of soil matric potential on the stress measurements. Measurements of canopy temperature, leaf water potential and leaf diffusion resistance were made hourly throughout the day.
Crop water stress index (CWSI) estimates derived from canopy temperature measurements in the least saline treatment had values similar to those found for cotton grown under minimum salinity profiles. Throughout the course of the day the treatments affected CWSI values with the maximum differences occurring in mid-afternoon. Salinity induced differences were also evident in the leaf diffusion resistance and leaf water potential measurements. Vapor pressure deficit was found to indicate the evaporative demand at which cotton could maintain potential water use for the various soil salinity levels studied. At vapor pressure deficits greater than 5 kPa, cotton would appear “stressed” at in situ soil water electrical conductivities exceeding 15 dS/m. The CWSI was as sensitive to osmotic stress as other, more traditional plant measures, provided a broader spatial resolution and appeared to be a practical tool for assessing osmotic stress occurring within irrigated cotton fields.
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Clawson KL, Blad BL (1982) Infrared thermometry for scheduling irrigation of corn. Agron J 74:311
Denmead OT, Shaw RH (1962) Availability of soil water to plants as affected by soil moisture content and meteorological conditions. Agron J 54:385
Ehrler WL (1973) Cotton leaf temperatures as related to soil water depletion and meteorological factors. Agron J 65:404
Hatfield JL (1983) The utilization of thermal infrared radiation measurement inputs from grain sorghum crops as a method of assessing their irrigation requirements. Irrig Sci 3:259
Hiler EA, Howell TA (1983) Irrigation options to avoid critical stress. Chapter 11. In: Limitations to Efficient Water Use in Crop Production, ASA, pp 479–497
Hiler EA, Howell TA, Lewis RB, Boos RP (1974) Irrigation timing by the stress day index method. Trans ASAE 17:393
Hiler EA, Clark RN (1971) Stress day index to characterize effects of water stress on crop yields. Trans ASAE 14:757
Hoffman GJ, Ayers RS, Doering EJ, McNeal BL (1980) Salinity in irrigated agriculture. Chapter 5 in: Jensen ME (ed) Design and Operation of Farm Irrigation Systems. ASAE Monogr pp 145–185
Howell TA, Hatfield JL, Yamada H, Davis KR (1983) Evaluation of cotton canopy temperature to detect crop water stress. Trans ASAE (in press)
Idso SB, Reginato RJ, Farah SM (1982) Soil and atmosphere induced plant water stress as inferred from foliage temperatures. Water Resour Res 18:1143
Idso SB, Jackson RD, Pinter PJ, Jr., Reginato RJ, Hatfield JL (1981 a) Normalizing the stressdegree-day concept for environmental variability. Agric Meteorol 24:45
Idso SB, Reginato RJ, Reicosky DC, Hatfield JL (1981 b) Determining soil-induced plant water potential depressions in alfalfa by means of infrared thermometry. Agron J 73:826
Idso SB, Jackson RD, Reginato RJ (1977) Remote sensing of crop yields. Science 196:19
Jackson RD (1982) Canopy temperatures and crop water stress. In: Hillel D (ed), Advances in Irrigation. Academic Press, New York. Vol. 1, pp 43–85
Jackson RD, Idso SB, Reginato RJ, Pinter, PJ Jr. (1981) Canopy temperature as a crop water stress indicator. Water Resour Res 17:1133
Pinter PS, Jr., Reginato RJ (1981) Thermal infrared techniques for assessing plant water stress. Proc ASAE Irrigation Scheduling Conference pp 1–9
Reginato RJ (1983) Field quantification of crop water stress. Trans ASAE 26:772–775, 781
Rhoades JD (1982) Use of saline drainage water for irrigation, a field test in the Westside Project, Kern County, California. US Salinity Laboratory. p 83
Rhoades JD, Corwin DL, Hoffman GJ (1981) Scheduling and controlling irrigations from measurements of soil electrical conductivity. Proc ASAE Irrigation Scheduling Conference pp 106–115
Rhoades JD, Rawlins SL, Phene CJ (1980) Irrigation of cotton with saline drainage water. Proc ASCE Irrigation and Drainage Conference p 22
Stegman EC, Schiele LH, Bauer A (1976) Plant water stress criteria for irrigation scheduling. Trans ASAE 19:850
Van Bavel CHM (1966) Potential evaporation: The combination concept and its experimental verification. Water Resour Res 5:380
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Howell, T.A., Hatfield, J.L., Rhoades, J.D. et al. Response of cotton water stress indicators to soil salinity. Irrig Sci 5, 25–36 (1984). https://doi.org/10.1007/BF00275035
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DOI: https://doi.org/10.1007/BF00275035