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Vegetative growth of winter barley in relation to environmental conditions and grain yield

Published online by Cambridge University Press:  27 March 2009

J. M. Ramos ,
L. F. Garcia del Moral  and
L. Recalde
J. M. Ramos
Affiliation:
Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad de Oranada, Spain
L. F. Garcia del Moral
Affiliation:
Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad de Oranada, Spain
L. Recalde
Affiliation:
Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad de Oranada, Spain
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Summary

The object of this study was to investigate the vegetative growth in six barley varieties grown in southern Spain (Granada) during 1979, 1980 and 1981. The results showed that crop dry weight (CDW) was dependent on environmental factors (mean temperature, rain, and radiation) which were the determinants of the two CDW components, leaf area index (LAI) and leaf area ratio (LAR). However, the effects of these climatic factors on crop growth rate (CGR) and on its components, mean leaf area index () and net assimilation rate (NAR), were partially obscured by ontogenetic drift. In addition, a highly significant relationship was demonstrated between CDW (when the LAI reaches its maximum value) and grain yield. This suggests that the pre-anthesis period has a great influence in the determination of grain yield variation in hot, dry areas, where photosynthesis is very limited after ear emergence.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 104 , Issue 2 , April 1985 , pp. 413 - 419
Copyright
Copyright © Cambridge University Press 1985

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