Farmland Load and Environmental Risk Assessment of Livestock Manure in Beijing

Since the 20 th century, livestock industry has brought a series of environmental problems along with its rapid development. In this paper, based on the excretion coefficient method, the amount of livestock manure and generated nutrients and pollutants in Beijing during 2000—2011 were estimated. The change of farmland load and the warning value of environmental pollution in each functional area in Beijing were also estimated. The results showed that the most serious manure pollution was cattle(cow and beef) manure, which accounted for 48.645%;expanded urban function area had the lowest farmland load,which was still over the limitation of 30 t/hm2,the R values in ecological development and conservation areas(Huairou, Pinggu and Miyun) were over 1, in which faced the greatest pollution pressure.