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

På svenska

Author

  • Carlos M. Correia
  • João F. Coutinho
  • Lars Olof Björn
  • José M. G. Torres-Pereira

Summary, in 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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Publishing year

2000

Language

English

Pages

117-125

Publication/Series

European Journal of Agronomy

Volume

12

Issue

2

Document type

Journal article

Publisher

Elsevier

Topic

  • Biological Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1161-0301