Prolonged elevated atmospheric CO(2)does not affect decomposition of plant material

M.A. de Graaff, J. Six, H. Blum, C. van Kessel

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Prolonged elevated atmospheric CO2 might alter decomposition. In a 90-day incubation study, we determined the long-term (9 years) impact of elevated CO2 on N mineralization of Lolium perenne and Trifolium repens plant material grown at ambient and elevated CO2 and low- and high-N-15 fertilizer additions. No significant differences were observed in N-15-NO3- recovery rates between any of the treatments, except an N addition effect was observed for L perenne (0.4 versus 0.5% N-15-NO3- day(-1) in high versus low N). The results suggest that elevated CO2 did not change plant N mineralization in any of the soils, because of a surplus of available N in the fertilized and leguminous systems, and because of insignificant plant responses to elevated CO2 in the low soil N availability systems. (c) 2005 Published by Elsevier Ltd.
Original languageEnglish
Pages (from-to)187-190
JournalSoil Biology and Biochemistry
Issue number1
Publication statusPublished - 2006


  • litter decomposition
  • populus-tremuloides
  • carbon-dioxide
  • co2
  • nitrogen
  • pco(2)
  • grassland
  • quality
  • n-15
  • sequestration

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