邹城市采煤塌陷区复垦土壤质量变化研究

Study on Quality Change of Reclaimed Soil in Coal Mining Subsidence Area in Zoucheng City

[目的]分析邹城市不同复垦年限土壤的质量变化。[方法]样品选自复垦工艺相同的5个不同复垦年限的复垦区和未塌陷区,选用pH、电导率、速效钾、有效磷、有机质、容重、碱解氮和紧实度8个指标,比较分析了复垦后土壤质量的时间和空间变化。[结果]利用相关系数确定权重,在Arcgis中运用地统计分析和空间分析,得到不同复垦年限的土壤质量分布图。随着时间的推移,复垦后邹城市土壤质量逐步提高;施肥不均和复垦机械造成的紧实度不均匀引起区域土壤质量变异系数比较大;复垦时的充填物质会对表层土壤质量产生影响,在较短的时间内,粉煤灰产生的影响要比煤矸石好。[结论]人工施肥不均、复垦机械作业以及复垦时的充填物质都能对复垦后的土壤质量产生影响。

[Objective] The study was to analyze the quality change of the soil with different reclamation years in Zoucheng city. [ Method ] The samples were collected from 5 reclamation areas with the same reclamation technology and different reclamation years and un-sunken area, 8 indexes of pH value, conductivity, rapidly available K, available P, organic matter, bulk density, alkaline hydrolytic N and degree of compaction were selected to analyze the temporal and spatial change of soil quality after reclamation. [ Result] The correlation coefficient was used to determine the weight, the geo-statistical analysis and spatial analysis were used in Arcgis and the distribution map of soil quality with different reclamation years was obtained. With the lapse of time, the soil quality of Zoucheng City was improved gradually after reclamation. The variation coefficient of regional soil quality was bigger, which was caused by uneven fertilization and uneven soil compaction caused by reclamation machine. The filling substance in reclamation had some effect on surface soil quality and the effect of fly ash was better than that of coal gangue in a shorter time. [ Conclusion ] Artificially uneven fertilization, mechanical operation and the filling substance in reclamation all could affect soil quality after reclamation.