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The Role of Fertilizer Management in the Development and Expression of Crop Drought Stress in Cereals under Mediterranean Environmental Conditions

Published online by Cambridge University Press:  03 October 2008

J. D. H. Keatinge ,
P. J. H. Neate  and
K. D. Shepherd
J. D. H. Keatinge
Affiliation:
Farming Systems Program, The International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
P. J. H. Neate
Affiliation:
Farming Systems Program, The International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
K. D. Shepherd
Affiliation:
Farming Systems Program, The International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
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Summary

The development and influence of crop drought stress was examined in winter-planted small-grain cereals under Mediterranean environmental conditions. In two average or wetter than average years crop drought stress in the grain-filling period was greatly exacerbated by the addition of fertilizer (N and P) and this usually resulted in significantly lower kernel weights. Yet this reduction was not so substantial as to seriously affect crop yields. Total grain yields were largest in treatments receiving fertilizer, due to greater spike numbers and numbers of kernels per spike. But heavy nitrogen applications may promote the risk of a large proportion of small or shrivelled grains in a dry year.

Type
Research Article
Information
Experimental Agriculture , Volume 21 , Issue 3 , July 1985 , pp. 209 - 222
Copyright
Copyright © Cambridge University Press 1985

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References

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