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Elevated Carbon Dioxide Effects on Nitrogen Dynamics in Grasses, with Emphasis on Rhizosphere Processes

^a Research Institute for Agrobiology and Soil Fertility (AB), Dep. of Soil Chemistry and Soil Ecology, P.O. Box 14, 6700 AA Wageningen, The Netherlands

View larger version (19K): [in a new window]   Fig. 1 Percentage of change in N content of plants, shoots, roots, shoot/root (S/R) ratio N, N percentage in shoots and roots, C/N ratio of shoots and roots, and N content in the rhizosphere soil solution, the rhizosphere soil microbial biomass (SMB) flush, and rhizosphere soil residue as a result of elevated CO2 and averaged across N levels, species, and harvests (n = 40). *, **, *** Significant at the 0.05, 0.01, and 0.001 levels of probability, respectively; ns is not significant