6Alvares A P, Hendrickson R F, Visek W J. 1964.Effects of soniazid chlortetrcycline and copper upon growth and gastrointestinal utease activity in chicks[J].J Nutr, 83 : 79 - 84.
7Arnett D B, Cullen P , Ebner P D, et al. 2002. Evaluation of methods for detecting the apramycin resistance gene in E. coli isolated from cold - stressed swine[ R]. Annual report :Department of animal science, the University of Tennessee.
8Carlie F S . 1984 . Ammonia in poultry houses:A literature review [ J ] . World' s Poultry Science Journal, 41 : 99 - 113.
9Catron D V,Lane M D,Quinn I. Y,Ashton G C , Maddock H H. 1953. Made of action of antibiotics on blood glucose [ J ]. Antibiotics and Chemotherapy, 3 : 571 - 577.
10Chaslus M,Dancla E,Lafont J P. 1985. Resistance to gentamicin and apramycin in E. coli from calves in France[J ]. Veterinary Record, 117(4) :90- 91.