Abstract: Sludge is the product of sediment in the process of sewage purification.It contents great organic matter and some nitrogen,phosphorous,potassium and micro elements,which turns into useful resource after reasonal treatment.Seawage sludge from Lanzhou Qilihe sewadge purification factory was applied onto Bromus inermis grassland during 1996 and 1998 with three years monitoring,aboveground yield increase on Bromus grassland with appropriate sludge application was 163～203 percent in 1996, 41～120 percent in 1998. Root biomass increase in 1996 was 35～106 percent higher than the control. Through sludge application,soil organic matter, totalnitrogen,phosphorous and potassium in 0～20 depth was increased significantly. Volume weight decreased with sludge increasing.The results indicated that,the nutritional element contents in the sludge from Qilihe sewadge purification factory was high,contents of harmful element was 10 wer than standards. It was usable biological resource.

Key words: Sludge, Bromus inermis, Soil, Biomass

摘要： 污泥是污水处理和水体沉积的产物,含有较多的有机质和一定量的氮、磷、钾及微量元素,经合理处置后可转化为可利用资源。为此,笔者于1996～1998年将兰州市七里河区污水处理厂生活污泥施于无芒雀麦人工草地。3年来对无芒雀麦和土壤进行多项监测,结果表明,施用适量污泥对无芒雀麦地上生物量增产幅度显著,1996年为163%～203%;1998年为41%～120%。1996年总根量比对照高35%～106%。施用污泥使0～20cm土壤的有机质、全氮、全磷和全钾含量显著增加。土壤容重随着污泥量的增加而减小。结果表明,七里河污水处理厂污泥的营养元素含量高,有害元素低于控制标准,是一种可利用的生物资源。

关键词: 污泥, 无芒雀麦, 土壤, 土物量