Soil microbial biomass carbon (a), soil microbial activity (b) and <i>q</i>CO<sub>2</sub> (c) in the perennial grasses and the shrubs in May, July and September in 2010.
<p>Vertical bars indicate standard errors of means (n = 3). Difference letters indicate statistically significant differences (P<0.05), and absence of letters implies that no significant differences were detected.</p