title: Solid beef cattle manure application impacts on soil properties and 17β-estradiol fate in a clay loam soil.
abstract: Livestock manure applied to agricultural land is one of the ways natural steroid estrogens enter soils. To examine the impact of long-term solid beef cattle (Bos Taurus) manure on soil properties and 17β-estradiol sorption and mineralization, this study utilized a soil that had received beef cattle manure over 35 years. The 17β-estradiol was strongly sorbed and sorption significantly increased (P < 0.05) with increasing soil organic carbon content (SOC) and with an increasing annual rate of beef cattle manure. The 17β-estradiol mineralization half-life was significantly negatively correlated, and the total amount of 17β-estradiol mineralized at 90 days (MAX) was significantly positively correlated with 17β-estradiol sorption. The long-term rate of manure application had no significant effect on MAX, but the addition of fresh beef cattle manure in the laboratory resulted in significantly (P < 0.05) smaller MAX values. None of the treatments showed MAX values exceeding one-third of the 17β-estradiol applied.
authors.affiliation: Department of Soil Science, University of Manitoba, Winnipeg, Manitoba, Canada.
authors.forename: Emmanuelle
authors.initials: E
authors.lastname: Caron
authors.forename: Annemieke
authors.initials: A
authors.lastname: Farenhorst
authors.forename: Xiying
authors.initials: X
authors.lastname: Hao
authors.forename: Claudia
authors.initials: C
authors.lastname: Sheedy
mesh_terms: D000327:Adsorption; D000383:Agriculture; D000538:Aluminum Silicates / Q000737:chemistry; D000818:Animals; D002417:Cattle; D000077215:Clay; D004958:Estradiol / Q000737:chemistry*; D008372:Manure / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D008372:Manure; D012987:Soil; D012989:Soil Pollutants; D004958:Estradiol; D000077215:Clay