Soil [N] modulates soil C cycling in CO2-fumigated tree stands: a meta-analysis

0356006 - ÚVGZ 2011 RIV GB eng J - Journal Article
Dieleman, W. I. J. - Luyssaert, S. - Rey, A. - De Angelis, P. - Barton, C. V. M. - Broadmeadow, M. - Broadmeadow, S. B. - Chigwerewe, K. S. - Crookshanks, M. - Dufrene, E. - Jarvis, P. G. - Kasurinen, A. - Kellomäki, S. - Le Dantec, V. - Liberloo, M. - Marek, Michal V. - Medlyn, B. - Pokorný, Radek - Scarascia-Mugnozza, G. - Temperton, V. M. - Tingey, D. - Urban, Otmar - Ceulemans, R. - Janssens, I. A.
Soil [N] modulates soil C cycling in CO2-fumigated tree stands: a meta-analysis.
Plant Cell and Environment. Roč. 33, č. 12 (2010), s. 2001-2011. ISSN 0140-7791. E-ISSN 1365-3040
Institutional research plan: CEZ:AV0Z60870520
Keywords : [CO2] enrichment * fine root production * microbial respiration * N fertilization * root biomass
Subject RIV: EH - Ecology, Behaviour
Impact factor: 5.145, year: 2010

We compiled a data set from 131 manipulation experiments, and used meta-analysis to test the hypotheses that: (1) elevated atmospheric CO2 stimulates soil C inputs more than C losses, resulting in increasing soil C stocks; and (2) that these responses are modulated by N.However, the increased soil C inputs were offset by increased heterotrophic respiration (Rh), such that soil C content was not affected by elevated CO2. Soil N concentration strongly interacted with CO2 fumigation: the effect of elevated CO2 on fine root biomass and -production and on microbial activity increased with increasing soil N concentration, while the effect on soil C content decreased with increasing soil N concentration.
Permanent Link: http://hdl.handle.net/11104/0194640