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Ultraviolet-B radiation and nitrogen effects on growth and yield of maize under Mediterranean field conditions

Author:
  • Carlos M. Correia
  • João F. Coutinho
  • Lars Olof Björn
  • José M. G. Torres-Pereira
Publishing year: 2000
Language: English
Pages: 117-125
Publication/Series: European Journal of Agronomy
Volume: 12
Issue: 2
Document type: Journal article
Publisher: Elsevier

Abstract english

The effects of an increase in UV-B radiation on growth and yield of maize (Zea mays L.) were investigated at four levels of applied nitrogen (0, 100, 200 and 300 kg ha−1 of N) under Mediterranean field conditions. The experiment simulated a 20% stratospheric ozone depletion over Portugal. Enhanced UV-B and N deficiency decreased yield and total biomass production by 22–49%. High UV-B dose reduced yield, total biomass and growth of N-fertilized maize plants but did not affect N-stressed plants to the same extent. The response of grain yield to N was smaller with enhanced UV-B radiation. The underlying mechanisms for these results are discussed.

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Keywords

  • Biological Sciences

Other

Published
  • ISSN: 1161-0301
Lars Olof Björn
E-mail: lars_olof [dot] bjorn [at] biol [dot] lu [dot] se

Professor emeritus

Molecular Cell Biology

+46 46 222 72 53

B-A340

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