[ Objective ] The study aims to discuss the feasibility of urban sewage sludge applied to desertification forestland. [ Method ] Through the simulated leaching test, the effects of sewage sludge on nutrients and heavy metals in aeolian sandy soil were analyzed. [Result] After the simulated leaching with sewage sludge, the contents of total nitrogen (TN) , total phosphorus (TP) , available nitrogen (AN) and available phosphorus ( AP) in each layer of aeolian sandy soil increased significantly, and the increase in 0 -20 cm soil was more significant than thai in 20 -40 and 40 -60 cm soil. Meanwhile, the content of each heavy melal in 0 -20 cm soil rase significantly, while the increase was small in 40 - 60 cm soil. In addition, after the application of sewage sludge, the Nemrow Index of aeolian sandy soil was 0. 67 , lower than the national soil quality standard of forest land (0.70) , and the short-time application of sewage sludge to sandy soil did not cause serious pollution. However, if sewage sludge has been applied to aeolian sandy soil for a long term, the potential hazard of lone-term accumulated heavy metals (especially Cd) should be paid more attention to.%[目的]探讨城市生活污泥在沙化林地利用的可行性.[方法]通过室内淋溶模拟试验,研究施用污泥对风沙土养分及重金属含量的影响.[结果]施加污泥模拟淋溶后,风沙土总氮、总磷、速效氮、速效磷在各土层含量显著增加,且0～20 cm土层增幅明显大于20～40、40 ～60 cm土层;各重金属(Cu、Cr、Pb、Zn)含量在O～20 cm土层增加显著,40～60 cm土层增幅较小.施用污泥淋溶后,风沙土内梅罗指数(0.67)虽低于国家林地土壤质量标准(0.70),短期内未对土壤造成严重污染,但若长期施用污泥,应注意各重金属特别是Cd的累积效应所带来的潜在危害.[结论]城市污泥在沙化林地的短期应用具有较好的可行性.
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