Fig. 2From: Effect of root exudates of Eucalyptus urophylla and Acacia mearnsii on soil microbes under simulated warming climate conditionsTwo type compounds of Eucalyptus urophylla root exudates. a The first category: more secretion under elevated CO2 condition, b The second category: more secretion under higher temperature& elevated CO2 condition. The mean values and standard deviations of three replicates are presented. Significant differences of variable means among different treatments at each sampling date are indicated by different letters (P < 0.05)Back to article page