Physical and Chemical Properties of the Topsoil under Different Reclamation Modes in Pingshuo Mining Area
Journal: Advanced Management Science (AMS)
Author: Gengjie Zhang1, 2, Chuan Zhang1, 2, Jiansheng Zhang1, 2, Zhongke Bai3, 4*
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
To assess the impacts of reclamation on topsoil physic-chemical properties in Pingshuo mining area, this paper compared bulk density (BD), field capacity (FC), organic matter (OM), total nitrogen (TN) and C/N at 0-10 cm and 10-20 cm of topsoil in typical plots through the transverse, longitudinal and comprehensive analysis. The results show, (1) all the physic-chemical indicators except BD of unreclaimed plots were lower than original plots and reclaimed plots; reclaimed woodland heaped by earth-rock had the highest OM. (2) BD of all plots in 0-10 cm was lower than in 10-20 cm; only unreclaimed plots had lower FC in 0-10 cm than in 10-20 cm; most plots had higher OM, TN and C/N at 0-10 cm than at 10-20 cm layer. (3) BD was significantly negatively correlated with FC and OM in original plots; BD and soil chemical indicators showed a significant positive correlation in unreclaimed plots, while the FC was significantly negatively correlated with other indicators; relativity of indicators in reclaimed plots were similar as original plots, just the relativity of BD and TN was significantly negative. (4) it was suggested that reclamation direction is woodland when the dump is heaped by earth-rock, while other initial reclamation direction is grassland, which could be changed into arable land after a few of years.