Tree Species Composition Influences Enzyme Activities and Microbial Biomass in the Rhizosphere: A Rhizobox Approach
Figure 3
Activities (mean ± standard deviation) of L-asparaginase, urease and proteinase in soils at different distances to the root mats under different tree species compositions.
Bars indicate standard deviations. Treatments P, S, A, P×S, P×A and P×S×A refer to poplar, willow, alder, poplar-willow, poplar-alder, and poplar-willow-alder, respectively. Different letters indicate significantly different means within the same treatment at P<0.05 according to Duncan’s multiple range test.