Abstract: The heavy metals pollution in poultry and livestock feeds and
manures under intensive farming in Jiangsu Province was investigated. 97 feed
and manure samples were sampled from 31 farming plants in 10 major cities of
Jiangsu. 14 metals, including Zn, Cu, Pb, Cd, Cr, Ni, Mo, Mn, Ba, Co, Sr, Ti,
As and Hg, were analyzed after samples acid digestion. The results showed that
the most feed samples contained high concentration of metals exceeding National
Hygienical Standard for Feeds. Meanwhile, it was found that Cu, Zn, Pb, Cd and
Cr concentrations in animal manures were also high, for example, Cu
concentration in a manure sample reached to as much as 1726.3 mg/kg. Heavy
metals loading quantities in soil per year were then calculated when metals
contaminated organic fertilizers were applied, and its effects on soil
environmental quality were further evaluated.
Keywords: heavy metal, intensive farming, feed, manure, Jiangsu Province
