黄土露天矿区重构土壤典型物理性质差异及对植被生长状况的影响

为研究重构土壤典型物理性质对植被生长状况的影响，以中煤平朔安太堡露天矿南排土场为研究对象，采用典型剖面采样法、室内测试法、方差分析法、拟合分析法等，分析土壤不同深度典型物理性质（土壤容重、土壤质量含水量）对植被生长指标的影响。结果表明，随着土层深度的增加，土壤容重均值呈现出先增加后减少的趋势，土壤质量含水量总体上随着土壤剖面深度的增加而降低。土壤容重介于0.87~2.00 g·cm^-3之间，土壤质量含水量的范围为1.19%~20.97%。各个土层之间土壤容重、土壤质量含水量均有较明显差异，且土壤容重在30~60 cm土层差异最明显，土壤质量含水量在0~30 cm土层差异最明显。研究区植被生长状况较好的样地土壤容重均值为1.47 g·cm^-3，土壤质量含水量随深度增加趋于10%左右，并且0~10 cm土层土壤容重与0~30 cm土层土壤质量含水量是影响植被生长的关键因素。研究区内重构土壤的容重、质量含水量在不同剖面以及不同土层之间存在较显著差异，表层土壤物理性质是影响植被生长的重要因素。

Effects of reconstructing soil in open cast mining areas of the Loess Plateau on soil physical properties and vegetative growth

We examined the southern dump of the Antaibao open-pit coal mine in Pingshuo, China to determine the effect of reconstructing typical physical properties of soil (soil bulk density, and soil mass water content)on vegetation growth status. Typical profile sampling, indoor testing, variance analysis, fitting analysis, and other methods were used in this study. Results showed that as soil depth increased, the average soil mass weight tended to first increase and then decrease, while the soil mass water content generally decreased with increasing soil section depth. Soil bulk density ranged from 0.87~2.00 g·cm^-3 and soil mass water content ranged from 1.19%~20.97%. There was a significant difference in soil bulk density and soil mass water content between each soil layer, with soil bulk density and soil mass water content being the most noticeably different between the layers 30~60 cm and 0~30 cm.The mean soil bulk density values of the samples with higher vegetation growth in the study area was 1.47 g·cm^-3 and soil mass water content tended to be about 10% with increased depth.The soil mass water content of the 0~10 cm and 0~30 cm layers were key factors influencing vegetation growth. Soil mass and water content of the reconstructed soil in the study area were significantly different between different sections and different soil layers, and the physical properties of surface soil were important factors influencing vegetation growth. These results could improve the basic principle of land reclamation in mining areas in theory and provide the basis for further optimizing land reclamation processes in practice.