Litter Quality of Populus Species as Affected by Free-Air Enrichment and N-FertilizationReport as inadecuate




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Applied and Environmental Soil ScienceVolume 2009 2009, Article ID 948363, 11 pages

Research ArticleEarth System Science and Climate Change, Department of Environmental Sciences, Wageningen University, P.O. Box 47, 6700 AA Wageningen, The Netherlands

Received 9 February 2009; Revised 17 August 2009; Accepted 13 October 2009

Academic Editor: Sabine Goldberg

Copyright © 2009 Esther Vermue et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effect of elevated and nitrogen fertilization on the molecular chemistry of litter of three Populus species and associated soil organic matter SOM was investigated by pyrolysis-gas chromatography-mass spectrometry. The results are based on 147 quantified organic compounds in 24 litter samples. Litter of P. euramerica was clearly different from that of P. nigra and P. alba. The latter two had higher contents of proteins, polysaccharides, and cutin-cutan, while the former had higher contents of phenols and benzofurans-pyrans. The difference between replications was at least as large as the effect of treatments, so that no systematic chemical changes were attributable to effect or N-fertilization effect. The chemistry of SOM under the various species and treatments did not show significant changes either. The low number of available replicates that is two was clearly insufficient to overcome the effect of spatial variation on litter chemistry and detect small differences in molecular litter chemistry.





Author: Esther Vermue, Peter Buurman, and Marcel R. Hoosbeek

Source: https://www.hindawi.com/



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