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Porometry and baseline analysis: The case for compatibility

OAR@ICRISAT

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Relation http://oar.icrisat.org/7665/
http://dx.doi.org/10.1016/0168-1923(90)90048-B
 
Title Porometry and baseline analysis: The case for compatibility
 
Creator Monteith, J L
 
Subject Agriculture-Farming, Production, Technology, Economics
 
Description This paper explores the suggestion by Idso and his colleagues that the response of stomata to saturation vapour pressure deficit may prove to be an artefact of porometry. Re-examination of their analysis reveals several potential sources of error leading to anomalously small ratios of aerodynamic to stomatal resistance both for leaves and for canopies. Arguments are advanced for adopting values of this ratio an order of magnitude larger than those used by Idso. The saturation deficit (D0) estimated within the canopies explored by Idso is then less than 1 kPa even when the deficit in ambient air approaches 30 kPa. As Idso's own porometer measurements suggest that stomatal closure in water hyacinth did not occur until D0 exceeded 1 kPa, his observations of stomatal resistance and radiative surface temperature appear to be fully compatible and his “apparent discrepancy” disappears
 
Publisher Elsevier
 
Date 1990
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/7665/1/AgriculturalandForestMeteorology_49_155-167_1990.pdf
Monteith, J L (1990) Porometry and baseline analysis: The case for compatibility. Agricultural and Forest Meteorology, 49 (2). pp. 155-167. ISSN 0168-1923