Municipal Sewage Effluent Application to Soils Bearing Hardwood Coppice and Loblolly Pine Stands

摘要

Treated municipal sewage effluent was spray irrigated on an area adjacent to the sewage treatment plant of the Town of Clemson, South Carolina. A hardwood coppice and a 35-year-old loblolly pine plantation were irrigated with weekly treatments for two years. These treatments were zero, 2.5 cm, 5 cm and a variable rate that during the growing season was 11.5 cm equivalent irrigation per week. Two-year biomass production on the coppice stand was proportional to treatment rates. There was no evidence of any groundwater or adjacent stream contamination at the rates applied.