Water use measurements for rice, specifically under lowland /flooded/ submerged condition, are difficult. Terms like reference evapo-transpiration, consumptive water use, actual ET, crop coefficients are reported for rice crop, but the component of water balance in most of the crop models is relatively weak, need to be strengthened. There is a need of good field experiments to be used for this purpose, regards
Please check the following link and PDF attachments.
http://link.springer.com/article/10.1007/BF00881016
Dear Dr. Kalra,
I suggest use to read the following article:
Bouman BAU, Peng S, Castaneda AR and Visperas RM (2005) Yield and water use of irrigated tropical aerobic rice systems. Agricultural Water Management 74(2): 87-105.
You may get easy access to the article via the following weblink # www.sciencedirect.com/science/ article/pii/S0378377404003257.
Dear Dr. Kalra,
I give you yet another reference of a comprehensive chapter on the subject:
De Datta SK (1981) Water use and water management practices for rice. Pages 297-347 in ''Principles and Practices of Rice Production - S.K. De Datta''. ISBN 0-471-09760-8. John Wiley & Sons, Inc. , 605 Third Avenue, New York 10158, USA
I hope you'll find it useful.
Dear Dr. Kalra
Yes I do agree with your views that it is very difficult to measure water use by rice crop. We have tried this measurement and pl. look our following publication.
Determination of evapotranspiration and crop coeffcients of rice and sunower with lysimeter
Agricultural Water Management 45 (2000) 41-54
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