Al Cu Fe Pb Zn Mn C CK-C 168.45 ± 8.47b 9.16 ± 0.26b 88.45 ± 3.14b 19.77 ± 0.17b 90.00 ± 3.69a 20.57 ± 0.48b DBM1a 329.25 ± 9.01a 13.18 ± 0.37a 149.97 ± 3.61a 20.64 ± 0.59ab 97.81 ± 4.00a 24.60 ± 0.77a DBM2b 123.84 ± 2.74c 7.42 ± 0.21c 23.66 ± 0.72c 21.42 ± 0.31a 70.07 ± 1.73b 18.35 ± 0.71b N CK-N 179.47 ± 7.23a 10.69 ± 0.07a 76.78 ± 3.53a 21.61 ± 0.39a 94.93 ± 5.41a 24.37 ± 0.00a DBM1 1.39 ± 0.26b 3.15 ± 0.09b 2.38 ± 0.48b 0.51 ± 0.03b 0.34 ± 0.07b 0.07 ± 0.02c DBM2 1.63 ± 0.23b 2.94 ± 0.39b 2.57 ± 0.19b 0.86 ± 0.07b 0.16 ± 0.02b 0.29 ± 0.09b P CK-P 101.75 ± 4.49a 11.01 ± 0.44a 28.85 ± 0.26a 37.18 ± 0.69a 51.79 ± 1.30a 27.32 ± 0.91a DBM1 1.74 ± 0.20b 6.17 ± 0.35b 3.89 ± 0.30b 2.97 ± 0.08b 0.30 ± 0.06b 0.31 ± 0.08b DBM2 3.17 ± 2.48b 7.67 ± 0.33b 6.23 ± 3.71b 2.47 ± 0.20b 0.29 ± 0.05b 0.51 ± 0.09b   CK-G 84.69 ± 2.97a 7.25 ± 0.41a 24.73 ± 0.90a 40.06 ± 0.87a 60.86 ± 1.24a 15.46 ± 0.68a DBM1 1.12 ± 0.04b 1.71 ± 0.10b 1.62 ± 0.03b 26.58 ± 3.50b 3.47 ± 0.17b 3.24 ± 0.17b DBM2 1.21 ± 0.21b 1.45 ± 0.06b 2.18 ± 0.35b 30.81 ± 4.36ab 2.85 ± 0.87b 2.67 ± 0.74b

aDBM1, Arthrobacter sp.; bDBM2, Bacillus sp.; Data are presented as the mean ± SD (n=3). In each treatment, values with different lowercase letters in the same column are significantly different (P <0.05).

Table 3: Metal availability in mining-contaminated soil after addition of nutrient sources and modified amendment (mg·kg-1).