中文摘要：

对关帝山4种植被恢复类型（包括云杉-落叶松-杨桦针阔混交林（简称针阔混交林）、杨桦阔叶林、沙棘灌木林和华北落叶松林）和撂荒地（对照）0-20cm土层土壤抗蚀性进行研究。结果表明，与撂荒地相比，不同植被恢复类型土壤抗蚀性均明显增强（P〈O．05），各种恢复林地土壤有机碳含量、〉O．25mm风干及水稳性团聚体含量均明显增加，水稳性团聚体平均重量直径（MWD湿）和水稳性指数均显著增大，团聚体结构破坏率和土壤容重显著减小；同时，植被恢复也改善土壤微团聚状况，使分散率降低，团聚度增加。采用主成分分析法，确定土壤抗蚀性评价指标的3个主成分，并确定土壤抗蚀性的综合评价模型，即Y-0．718Y1＋0．167Y2＋0．115Y3，依据土壤抗蚀性综合主成分值，得出土壤抗蚀性强弱顺序为：针阔混交林（2．621）〉杨桦阔叶林（1．204）〉沙棘灌木林（-0．159）〉华北落叶松林（-1．056）〉撂荒地（-2．609）。建议在该区进行生态修复的营林过程中，加强对人工林的抚育管理，以增强其水源涵养和水土保持功能。

英文摘要：

The soil anti-erodibility in 0--20 cm soil layer were studied for four vegetation restoration types（in- cluding the coniferous and broad-leaved mixed forest（by the composition of Picea meyer, P. wilsonii, Larix principis-rupprechtii , Populus davidiana and Betula platyphlla ） , the broad-leaved forest of P. davidiana and B. platyphlla, the shrub of Hippophaer hamnoides and the Larix principis-rupprechtii forest）and an abandoned land（control）in Guandi Mountain. The results showed that the soil anti-erodibility significantly increased （P〈0.05） compared to the abandoned land. In different forest lands, the contents of soil organic carbon, soil aggregates〉0.25 mm and water-stable aggregates〉0.25 mm increased obviously, the wet-sie- ving mean weight diameters （MWD） and soil aggregate water-stability index improved significantly and the soil aggregate breakage rate and soil bulk density reduced obviously. At the same time, vegetation restora- tion was helpful for the situation of the soil micro-aggregate and decreased the dispersion ratios and increased the aggregation degree. Using the method of principal component analysis, three principal component of soil anti-erodibility could be determined. Then the comprehensive evaluation model of soil anti-erodibility was found, which was Y10. 718Y1 ＋0. 167Y2 ＋0. ll5Ya. According to the comprehensive principal component index of anti-erodibility, the order of anti-erodibility with different vegetation restoration types was： The co- niferous and broad-leaved mixed forest（2. 621）〉the broad-leaved forest（1. 204）〉the shrub（-0. 159）〉the Larix fores t（-1. 056）〉the abandoned land（-2. 609）. It is suggested that the management of the artificial forest should be strengthened during ecological restoration. So the function of water conservation and soil conservation could be enhanced.