%0 Journal Article
%A Oelmann, Y.
%A Kreutziger, Y.
%A Temperton, V.  M.
%A Buchmann, N.
%A Roscher, Ch.
%A Schumacher, J.
%A Schulze, E.-D.
%A Weisser, W. W.
%A Wilcke, W.
%T Nitrogen and phosphorus budgets in experimental grasslands of variable diversity
%J Journal of environmental quality
%V 36
%@ 0047-2425
%C Madison, Wis.
%I ASA [u.a.]
%M PreJuSER-56229
%P 396 - 407
%D 2007
%Z Record converted from VDB: 12.11.2012
%X Previous research has shown that plant diversity influences N and P cycles. However, the effect of plant diversity on complete ecosystem N and P budgets has not yet been assessed. For 20 plots of artificially established grassland mixtures differing in plant diversity, we determined N and P inputs by bulk and dry deposition and N and P losses by mowing (and subsequent removal of the biomass) and leaching from April 2003 to March 2004. Total deposition of N and P was 2.3 +/- 0.1 and 0.2 +/- 0.01 g m(-2) yr(-1), respectively. Mowing was the main N and P loss. The net N and P budgets were negative (-6.3 +/- 1.1 g N and -1.9 +/- 0.2 g P m(-2) yr(-1)). For N, this included a conservative estimate of atmospheric N(2) fixation. Nitrogen losses as N(2)O were expected to be small at our study site (<0.05 g m(-2) yr(-1)). Legumes increased the removal of N with the harvest and decreased leaching of NH(4)-N and dissolved organic nitrogen (DON) from the canopy. Reduced roughness of grass-containing mixtures decreased dry deposition of N and P. Total dissolved P and NO(3)-N leaching from the canopy increased in the presence of grasses attributable to the decreased N and P demand of grass-containing mixtures. Species richness did not have an effect on any of the studied fluxes. Our results demonstrate that the N and P fluxes in managed grassland are modified by the presence or absence of particular functional plant groups and are mainly driven by the management.
%K Agriculture: methods
%K Biodiversity
%K Biomass
%K Fabaceae: growth & development
%K Nitrates: analysis
%K Nitrogen: analysis
%K Phosphorus: analysis
%K Poaceae: growth & development
%K Quaternary Ammonium Compounds: analysis
%K Rain
%K Soil: analysis
%K Nitrates (NLM Chemicals)
%K Quaternary Ammonium Compounds (NLM Chemicals)
%K Soil (NLM Chemicals)
%K Phosphorus (NLM Chemicals)
%K Nitrogen (NLM Chemicals)
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:17255627
%U <Go to ISI:>//WOS:000244979300007
%R 10.2134/jeq2006.0217
%U https://juser.fz-juelich.de/record/56229