In addition, research results have shown that soil organic carbon is the main determinant of active organic carbon, and there is a highly significant positive correlation between different active organic carbon components, indicating that they are closely related and jointly affect the turnover of soil organic carbon as similar active carbon pools ( Wang et al., 2020 ).
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Characteristics and factors influencing soil organic carbon composition by vegetation type in spoil heaps.
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Soil TN, TP, and AK all showed an increasing trend with vegetation restoration ( Figures 5D, E, F ), and vegetation restoration had a significant effect on all three factors ( p <0.05).