试验比较了某矿区原地貌样地与塌陷样地以及湖泥充填复垦5a、12a样地土壤有机碳、全氮、全磷、全钾含量以及pH值的变化过程.测量的土壤深度为60 cm,每20 cm一层,比较了4个样地0～20 cm、20～40 cm、40～60 cm土壤养分的变化.结果表明:4个样地土壤剖面各层从上到下SOC、土壤全氮、全磷、全钾含量均呈递减趋势.0～20 cm,湖泥充填复垦12年样地土壤剖面各层SOC、土壤全氮、全磷、全钾含量均优于原地貌样地.20～40 cm、40～60 cm湖泥充填复垦12年样地土壤剖面各层SOC、土壤全N、全P、全K含量基本能够达到原地貌样地含量水平.湖泥充填复垦5年样地土壤剖面各层SOC、土壤全氮、全磷、全钾含量均低于原地貌样地,但相对矿区塌陷样地有很大改善.4个样地的土壤表层pH值差异不明显且均在中性范围内,适合植物和微生物的生长发育.%Changes in soil organic carbon (SOC), totalN, totalP, total K concentrations and pH value in the original topography venue were compared with subsided venue, lake mud filling reclamation 5 years and 12 years venue. The soil were sampled every 20 cm from 0 cm to 60 cm. Soil nutrient concentrations were compared among the four venues for 0～20 cm, 20～40 cm, and 40～60 cm soil.The results were as follows: In these four venues, SOC, totalN, total P and total K concentrations decreased in the soil profile from the top to the bottom sampled layer.In the range of 0～20 cm, SOC, total N, totalP, total K concentrations in the soil profile of the lake mud fillingreclamation 12 years venue were higher than the original topography venue.In the range of 20～40 cm and 40～60 cm, SOC, total N, total P, total K concentrations in the soil profiles of the lake mud filling reclamation 12 years venue reached the original topography venue level.SOC, total N, total P and total K concentrations in soil profiles of the lake mud filling reclamation 5 years venue were lower than those in the original topography venue, but appeared a great improvementcompared to the subsided venue.The soil pH values of the four venues were not obviously different. All of them were in the neutral range, which was suitable for the growth of plants and microorganisms.
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