Separating root and soil microbial contributions to soil respiration: A review of methods and observations
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...…et al. 2004, Knorr et al. 2005), we selected these amendment levels to reflect a supply of labile carbon that equates with a broad range of published soil CO2 efflux rates (Rustad et al. 2001), assuming that 50% of total soil CO2 efflux is derived from microbial mineralization (Hanson et al. 2000)....
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...Average annual soil moisture deficit (in mm H2O) was estimated as the sum of the differences between mean monthly potential evapotranspiration (PET) and mean monthly precipitation....
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1,794 citations
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...gif" NDATA ITEM> ]> The respiratory activities of plant roots, of their mycorrhizal fungi and of the free-living microbial heterotrophs (decomposers) in soils are significant components of the global carbon balance, but their relative contributions remain uncertai...
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1,377 citations
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...There are unique challenges to measuring the respiration of leaves, stems, and roots (Hanson et al., 2000; Davey et al., 2004; Moore et al., 2008) and the relationship between plant productivity and respiration is variable in each of these tissues (Litton et al., 2007)....
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...There are unique challenges to measuring the respiration of leaves, stems, and roots (Hanson et al., 2000; Davey et al., 2004; Moore et al., 2008) and the relationship between plant productivity and respiration is variable in each of these tissues (Litton et al....
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1,275 citations
1,190 citations
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...A range of 14C and 13C tracer studies have shown that approximately 5–20% of net fixed C can be accounted for in rhizosphere respiration (Hanson et al., 2000; Nguyen, 2003)....
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References
3,271 citations
"Separating root and soil microbial ..." refers background or result in this paper
...Reduced rates of heterotrophic respiration in the analysis provided by Raich and Schlesinger (1992) would have increased their estimates of the soil turnover time for an average forest ecosystem....
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...The conclusion of a mean RC near 50 percent differs substantially from the prior estimate of RC used by Raich and Schlesinger (1992) in their global analysis of the impact of warming on soil respiration and soil carbon turnover rates....
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2,019 citations
1,646 citations
"Separating root and soil microbial ..." refers methods in this paper
...As the distinctive13C label is added to the FACE plot, the CO2 fertilization effect may increase root respiration (Schlesinger & Andrews 1999)....
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1,003 citations
"Separating root and soil microbial ..." refers background in this paper
...Much discussion centers on the feasibility of this approach (Anderson 1991; Dixon & Turner 1991; Jenkinson et al. 1991; Johnson & Kern 1991; Raich & Nadelhoffer 1989; Schlesinger 1990; Smith et al. 1997; Winjum et al. 1992)....
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734 citations