关键词: 污泥, 重金属, 结缕草, 绿化, 处置利用, 土壤蓄水量, 小麦产量, 深翻时间, 休闲期, 旱地

Abstract: The experiment of sewage sludge composted as fertilizer for Zoysia japonica was conducted, and the results showed that Cd content in soil was lower than0.3mg穔g^-1 under the condition of the fertilizer application lower than45t穐m^-2(dry weight)and the pHvalue of soil lower than6.5 (Cd as the limiting factor for the amount of fertilizer application). NO₃^- -Ncontent of groundwater was lower than the standard of the first class groundwater (10mg穔g^-1).The contents of organic matter, available N, total N, and total Pwere higher than those under control by 16%, 78%, 61%, and 140%, respectively. The biomass of Zoysia japonica was increased two times a-gainst the control. Therefore, sewage sludge utilized as fertilizer for grassland might be a valuable approach.

Key words: Sewage sludge, Heavy metal, Zoysai japonica, Greening, Disposal and utilization, fallow period, dry land, soil water storage capacity, grain yield of wheat, deep plowing time