supported by the National Natural Science Foundation of China(No.41371319);the Special Funds for Enviro-Scientific Research(No.2013467036);the Agro-Scientific Research in the Public Interest(No.200903011)
The 360 feed and manure samples were collected from 150 animal farms in Jiangsu Province, China and analyzed for heavy metals. Concentrations of Zn and Cu in animal feeds were 15.9-2041.8 and undetected-392.1 mg/kg re...