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RECORD NUMBER: 2 OF 6

OLS Field Name OLS Field Data
Main Title Efficiency of Water Use as Influenced by Micrometeorological and Physiological Processes.
Author Kanemas, Edward T. ; Tear, I. D. ; Power, W. L. ; Si, J. W. ; Bru, L. J. ;
CORP Author Kansas Water Resources Research Inst., Manhattan.
Year Published 1973
Report Number Contrib-119; DI-14-31-0001-3516; OWRR-A-044-KAN; 14206,; A-044-KAN(2)
Stock Number PB-223 371
Additional Subjects ( Grain sorghum plants ; Evapotranspiration) ; ( Wheat plants ; Evapotranspiration) ; Photosynthesis ; Micrometeorology ; Soil water ; Carbon dioxide ; Plant tissues ; Water consumption ; Transpiration ; Acetic acid ; Mercury organic compounds ; Water use ; Antitranspirants ; Stomatal resistance ; Acetic acid/(phenyl mercury salt)
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB-223 371 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 75p
Abstract
Water-use efficiency (net photosynthesis/evapotranspiration) was studied on sorghum treated with an antitranspirant, phenylmercuric acetate. Short-term studies of 3 to 4 days post-treatment showed that water use efficiency was reduced. Results show that diffusion porometry and field chambers can be used, to test other antitranspirants applied to field-grown crops. Net photosynthesis and water use efficiency of sorghum was not significantly affected during a period of water stress. Stomatal resistance, as measured with the diffusion porometer, increased rapidly at a critical soil moisture and was concurrent with a decline in net photosynthesis. Stomatal resistance may be an indicator for irrigation scheduling. Water use efficiency was studied in awned and awnless isogenic lines of wheat. The laboratory study showed that the awnless isogenic head has a 20% greater water use efficiency than the awned. (Author)