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

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

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Sammanfattning

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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Originalspråkengelska
Sidor (från-till)117-125
TidskriftEuropean Journal of Agronomy
Volym12
Utgåva2
DOI
StatusPublished - 2000

Ämnesklassifikation (UKÄ)

  • Biologiska vetenskaper

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