## 3 Results
### Relationship between Soil Enzyme Activities and Diversity Indices of Soil Microbial Community  
There was no significant correlation between rhizosphere and non-rhizosphere bacterial diversities and soil enzyme activities (Table 2). However, the rhizosphere fungi diversity was significantly related to phosphatase, and non-rhizosphere fungi diversity was significantly correlated with sucrase enzymes (Table 2). Moreover, the sucrase enzyme was significantly correlated with rhizosphere soil fungi evenness index (Table 2).  
\begin{table}
\begin{tabular}{c c c c c c c} \hline  & \multicolumn{2}{c}{**Microbial Diversity**} & **Catalase** & **Urease** & **Sucrase** & **Phosphatase** \\ \hline Rhizosphere & Bacteria & \(H^{\prime}\) & 0.376 & 0.594 & 0.028 & 0.333 \\  & & \(S\) & 0.375 & 0.534 & 0.001 & 0.375 \\  & & \(d_{\text{MAr}}\) & 0.405 & 0.579 & \(-\)0.030 & 0.424 \\  & & \(En\) & 0.376 & 0.656 & 0.052 & 0.289 \\  & & \(D\) & 0.346 & 0.573 & 0.061 & 0.299 \\  & Fungi & \(H^{\prime}\) & 0.679 & 0.362 & \(-\)0.773 & 0.924 \({}^{\ast}\) \\  & & \(S\) & 0.724 & 0.394 & \(-\)0.814 & 0.942 \({}^{\ast}\) \\  & & \(d_{\text{MAr}}\) & 0.717 & 0.396 & \(-\)0.807 & 0.938 \({}^{\ast}\) \\  & & \(En\) & \(-\)0.738 & \(-\)0.218 & 0.913 \({}^{\ast}\) & \(-\)0.890 \({}^{\ast}\) \\  & & \(D\) & 0.631 & 0.325 & \(-\)0.729 & 0.903 \({}^{\ast}\) \\ Non-rhizosphere & Bacteria & \(H^{\prime}\) & 0.053 & 0.682 & 0.311 & \(-\)0.170 \\  & & \(S\) & 0.219 & 0.793 & 0.183 & 0.002 \\  & & \(d_{\text{MAr}}\) & 0.232 & 0.799 & 0.170 & 0.011 \\  & & \(En\) & \(-\)0.852 & \(-\)0.649 & 0.644 & \(-\)0.854 \\  & & \(D\) & 0.078 & 0.705 & 0.287 & -0.137 \\ \hline \end{tabular}
\end{table}
Table 2: The Pearson correlations among soil enzyme activities and diversity indices of soil microbial community.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline  & \multicolumn{2}{c}{**Microbial Diversity**} & **Catalase** & **Urease** & **Sucrase** & **Phosphatase** \\ \hline Rhizosphere & Bacteria & \(H^{\prime}\) & 0.376 & 0.594 & 0.028 & 0.333 \\  & & \(S\) & 0.375 & 0.534 & 0.001 & 0.375 \\  & & \(d_{\text{MAr}}\) & 0.405 & 0.579 & \(-\)0.030 & 0.424 \\  & & \(En\) & 0.376 & 0.656 & 0.052 & 0.289 \\  & & \(D\) & 0.346 & 0.573 & 0.061 & 0.299 \\  & Fungi & \(H^{\prime}\) & 0.679 & 0.362 & \(-\)0.773 & 0.924 \({}^{\ast}\) \\  & & \(S\) & 0.724 & 0.394 & \(-\)0.814 & 0.942 \({}^{\ast}\) \\  & & \(d_{\text{MAr}}\) & 0.717 & 0.396 & \(-\)0.807 & 0.938 \({}^{\ast}\) \\  & & \(En\) & \(-\)0.738 & \(-\)0.218 & 0.913 \({}^{\ast}\) & \(-\)0.890 \({}^{\ast}\) \\  & & \(D\) & 0.631 & 0.325 & \(-\)0.729 & 0.903 \({}^{\ast}\) \\ Non-rhizosphere & Bacteria & \(H^{\prime}\) & 0.053 & 0.682 & 0.311 & \(-\)0.170 \\  & & \(S\) & 0.219 & 0.793 & 0.183 & 0.002 \\  & & \(d_{\text{MAr}}\) & 0.232 & 0.799 & 0.170 & 0.011 \\  & & \(En\) & \(-\)0.852 & \(-\)0.649 & 0.644 & \(-\)0.854 \\  & & \(D\) & 0.078 & 0.705 & 0.287 & -0.137 \\ \hline \end{tabular}
\end{table}
Table 1: Mean (\(\pm\)SD) diversity indices of microbial community in rhizosphere and non-rhizosphere soil.  
Figure 6: Abundance of rhizosphere and non-rhizosphere soil bacteria and fungi \(rRNA\) genes in copper tailings dam. The different case letters indicate that the means are significantly different among reclaimed scenario (\(P<0.05\)) with Duncan test (a \(>b>c\)).