【作者】 曹磊； 刘学娅； 胡增辉； 冷平生；

【Author】 CAO Lei;LIU Xue-ya;HU Zeng-hui;LENG Ping-sheng;College of Landscape Architecture,Beijing University of Agriculture;Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees;

【机构】 北京农学院园林学院； 北京林果业生态环境功能提升协同创新中心；

【摘要】 将城市污泥与建筑垃圾按体积比1:1混配基质,覆盖于模拟的煤矸石边坡上,以田园土坡面为对照,种植暴马丁香,调查坡面植物生长情况,分析种植基质的理化性状、重金属含量、土壤酶活性等的变化。试验结果表明:植物生长季结束后,污泥混合基质坡面植物总盖度比对照坡面高30%,暴马丁香株高比对照高53.8%;有机质含量是对照的4.5倍,全氮和碱解氮是对照的3.8倍和8倍,全磷和速效磷是对照的6.3倍和1.1倍,全钾和速效钾是对照的2.7倍和4.9倍。根际土壤脲酶、过氧化氢酶、蔗糖酶和碱性磷酸酶活性分别是对照的1.4倍、1.5倍、1.5倍和3倍。可见污泥混合基质保水性好,肥力高,能为植物生长提供充足的养分,而且重金属含量在安全使用范围内,并随着时间的推移呈下降趋势。因此,城市污泥用于边坡生态修复不仅效果良好,而且实现了污泥的资源化和无害化利用。更多还原

【Abstract】 In this study,the effect of sewage sludge substrate on the growth of vegetation was investigated.The simulated coal gangue slope was covered by the mixed substrate of sewage sludge and construction waste at volume ratio 1:1,then Syringa reticulata var.mandshurica seeds were sowed,the growth of S.reticulata var.mandshurica and the herbs grown naturally were measured.The physical and chemical properties,heavy metal content,and soil enzyme activity of the substrate were analyzed.The garden soil was used as the control.The results showed that at the end of the growing season,the plant coverage on the treated slope was 30% higher than that on the control slope.The height of S.reticulata var.Mandshurica on the treated slope was 53.8% higher than on the control slope.And in rhizosphere soil on the treated slope,the organic matter content,the total nitrogen content,the available nitrogen content,the total phosphorus content,the available phosphorus content,the total potassium content,and the available potassium content were 4.5,3.8,8,6.3,1.1,2.7,4.9 times higher than on the control slope,respectively.The activities of urease,catalase,invertase,alkaline phosphatase in rhizosphere soil on the treated slope were 1.4,1.5,1.5,3 times higher than on the control slope,respectively.Thus the mixed substrate of sewage sludge and construction waste possessed high water holding capacity and fertility,and can provide sufficient water and nutrient for plants.Moreover,the contents of heavy metals were found to be in the safe range,which presented a decreased pattern along with time.Therefore,not only the slope vegetation restoration showed a good effect,but also the reclamation and harmless utilization of sewage sludge was realized.更多还原