Table 2 Soil enzyme activities.

From: Structural and functional differentiation of bacterial communities in post-coal mining reclamation soils of South Africa: bioindicators of soil ecosystem restoration

Site

Soil group (Sample size)

ß-glucosidase (P-nitrophenol µg/g/h)

Alk-phosphatase (P-nitrophenol µg/g/h)

Acid-phosphatase (P-nitrophenol µg/g/h)

Urease (NH4−N µg/g/2 h)

Site X

ReclX (N = 3)

66.18 ± 18.86c

148.59 ± 54.60b

869.95 ± 153.65c

5.02 ± 1.07c

 

RefX (N = 5)

457.14 ± 64.42ab

182.87 ± 39.09b

1603.13 ± 48.97a

21.25 ± 7.44abc

Site Y

ReclY (N = 5)

175.66 ± 74.66bc

155.17 ± 73.16b

1186.49 ± 233.67bc

16.44 ± 5.56bc

 

RefY (N = 3)

693.83 ± 130.37a

2142.69 ± 633.53a

1437.06 ± 378.83ab

45.42 ± 25.38a

Site Z

ReclZ (N = 5)

529.79 ± 113.28a

226.16 ± 110.03b

1640.53 ± 102.21a

28.95 ± 7.26ab

 

RefZ (N = 5)

494.92 ± 270.51ab

256.77 ± 142.08b

1536.95 ± 170.33ab

27.42 ± 12.36abc

  1. Values (mean ± SD) followed by different superscript letters across columns are significantly different (Wald chi-square test, P < 0.05) based on interactions between fixed factors “site” and “history” in the mixed linear model. Alk, Alkaline.
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