Abstract: Concentrations of nutrient and toxic substances in livestock manure directly affect the value of its use.A total of 19 chicken manure samples were collected from intensive poultry farms in Zhejiang Province for characterizing contents of nutrient substances and pollutant elements,and chemical forms of P,Cu and Zn therein.Results show that the chicken manure contained high amounts of crude protein,minerals,Cu,Zn as well as dissolved salts.The elements of P,Cu and Zn in the manure were present mainly in extractable form,and hence high in bio-availability and mobility.The concentrations of trace elements and heavy metals in the chicken manure were obviously higher than those in the feedstuff that were fed,and affected by the latter.Significant correlations were found between concentration of Ca,Mg,P,K,As,Cd,Cr,Cu,Fe,Mn,Pb and Zn in the chicken manure and those in the feedstuff.Quality of feedstuff was an important factor controlling concentrations of heavy metals in chicken manure.

Key words: chicken manure, nutrient substance, heavy metal, chemical form