Abstract
A total of 122 farmyard manure samples (75 cattle manure, 23 poultry manure and 24 swine manure) collected in Fukushima Prefecture were analyzed for trace elements. The results obtained are summarized as follows: 1) The trace element concentrations were in the order of Na, Fe and Al (the median in all farmyard manure: 4194-4985mg kg^<-1>)>Ti, Mn and Zn (222-578mg kg^<-1>)>Cu, Rb, Sr and Ba (19-87mg kg^<-1>)>Li, V, Cr, Ni, Ga, As, Y, Zr, Mo, Cd, Pb, La, Ce and Nd (0.32-7.53mg kg^<-1>). 2) The concentrations of Li, Al, Ti, V, Fe, Ga, As, Zr and Ba in cattle manure were higher than those in poultry manure, and highly positive correlation coefficients were observed among these elements in many combinations. In contrast, the contents of N, Mg, P, Ca, Ni, Cu, Zn, Sr and Mo in poultry manure were higher than those in cattle manure. The swine manure possessed the chemical properties of both cattle manure and poultry manure, with some exceptions. 3) The concentrations of Cd, As and Pb were generally low in farmyard manure. Although Zn was used as an index to monitor the accumulation of other harmful elements stemming from the application of farmyard manure, higher correlation coefficients were not found among Cu, Zn, Cd, As and Pb when all kinds of manure from different types of domestic animals were taken into consideration. 4) Cu and Zn concentrations were high in poultry manure and particularly high in swine manure, suggesting that care should taken to avoid soil pollution caused by the application of these manure types.
