title: Application of sewage sludge compost on highway embankments.
abstract: More and more sewage sludge is being produced in China. Safe and economical methods for sewage sludge disposal should be found considering the increase in sewage treatment. In order to verify the feasibility of sludge disposal on newly built highway embankments, five treatments (0, 15, 30, 60 and 120 tons ha(-1)) of sewage sludge compost (SSC) were added to a silty-clay embankment soil on the Xi-Huang highway. The results showed that amendment with SSC increased soil available N, available P, organic matter, cation exchange capacity, and water content, and decreased soil bulk density. Application of SSC enhanced ryegrass growth and reduced runoff and soil erosion. Heavy metal losses from sediments in runoff remained constant or decreased relative to the control until a rate of 60 tons ha(-1) was exceeded, when heavy metal losses appeared to increase.
authors.affiliation: College of Science, Northwest A and F University, Yangling, Shaanxi Province, People's Republic of China. pengcheng1969@tom.com
authors.forename: Gao
authors.initials: G
authors.lastname: Pengcheng
authors.forename: Tang
authors.initials: T
authors.lastname: Xinbao
authors.forename: Tong
authors.initials: T
authors.lastname: Yanan
authors.forename: Chen
authors.initials: C
authors.lastname: Yingxu
mesh_terms: D005308:Fertilizers; D019015:Geologic Sediments; D008129:Lolium / Q000254:growth & development / Q000378:metabolism; D019216:Metals, Heavy / Q000378:metabolism; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage; D012987:Soil; D014874:Water Pollutants, Chemical / Q000378:metabolism
chemical_list: D005308:Fertilizers; D019216:Metals, Heavy; D012722:Sewage; D012987:Soil; D014874:Water Pollutants, Chemical