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European Journal of AgronomyVolume 12, Issue 2, March 2000, Pages 117-125

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

  • aDept. of Biol. and Environ. Eng., ICETA-Univ. Tras-os-Montes Alto D., Vila Real, Portugal
  • bDepartment of Soil Science, Univ. Tras-os-Montes Alto Douro, A., Vila Real, Portugal
  • cDepartment of Plant Physiology, Lund University, Lund, Sweden

Abstract

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. (C) Elsevier Science B.V.

Author keywords

MaizeNitrogenUV-B radiation

Indexed keywords

GEOBASE Subject Index:growth responsemaizenitrogenozone depletionultraviolet B radiationyield response
Species Index:Zea mays
  • ISSN: 11610301
  • CODEN: EJAGE
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1016/S1161-0301(99)00050-7
  • Document Type: Article

  Correia, C.M.; Dept. of Biol./Environmental Engg., ICETA, Univ. of Tras-os-Montes/Alto Douro, Apartado 202, Portugal;
© Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.

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