Abstract:

To investigate the status and pollution situation of livestock and poultry breeding industry in Yiwu City and put forward the corresponding measures, annual total excrement from main livestock/poultry and nitrogen, phosphorus content in which were evaluated based on the agricultural pollution census data and poultry waste emission coefficient in urine. The study showed that, gross livestock/poultry excrement in 2007 comprises of 16.6×104 tons of feces and 48.5×104 tons of urine. The total livestock/poultry excrement contained 0.18×104 tons total N, 348.59 tons total P, 3.16×104 tons COD, 1.10×104 tons Cu, and 2.07×104 tons Zn. Among the main livestock/poultry, pigs excreted the highest amount of feces, accounting for 78.3% of the total excrement; the livestock/poultry urine was also produced by pigs, accounting for 99.8%. The highest amount of livestock/poultry excrement came from Yiting town, accounting for 39.4%.