RAINFOR GEM Intensive Plots Manual (pdf) - University of Oxford

3. CO 2 EFFLUX3.1 Total soil CO 2 effluxNote: for this experiment, it is necessary to be very clear exactly what is included in the term heterotrophicrespiration (CO 2 efflux): here we understand R h to mean the respiration by heterotrophs (see Kuzyakov &Gavrichkova 2010:Fig.1 shown above) but excluding rhizo-microbial respiration. Soil respiration refers to thetotal soil CO 2 efflux (= heterotrophic respiration + root-derived respiration). Note especially that heterotrophicrespiration includes the microbial respiration of all dead plant residues including fine litter, coarse woody debrisand standing dead tree stems even though these are generally considered to be on rather than part of the soil. Itis also beneficial to know about soil priming effects (mentioned briefly in Nadelhoffer et al. 2004, reviewed inSayer et al. 2011).49