8Shreve B R, Moore P A, Daniel T C, et al. Reduction of Phosphorus in Runoff from Field-applied Poultry Litter Using Chemical Amendments[ J]. Journal of Environmental Quality, 1995, 24 ( 1 ) : 106 - 111.
9Kilbride A L, Mendl M, Statham P, et al. A Cohort Study of Preweaning Piglet Mortality and Farrowing Accommodation on 112 Commercial Pig Farms in England [ J ]. Preventive Veterinary Medicine, 2012, 104(3) : 281 -291.
10Gilchrist M J, Greko C, Wallinga D B, et al. The Potential Role of Concentrated Animal Feeding Operations in Infectious Disease Epidemics and Antibiotic Resistance [ J ]. Environmental Health Perspectives, 2007, 115(2) : 313.
