5M.H.Roller,G.S.Riedemann,R.N.Swanson etal:Ovine blood chemistry value measured during ammonia toxicosis[J].Am J Vet Res,Vo143,No.6:1068-1071.
6Singer RH etal:Acute ammonium salt poisioning in sheep[K].Iowa state university,Ames,Iowa,1969.
7C.M.Wathes,T.G.M.Demmers,N.Teers etal:Production response of weaned pigs after chronic exposure to airbone dust and ammonia[J].Animal Science,2004,78:87-97.
8Anderson,D.P,R.W.Wolfe,F.L.Cherms and W.E.Roper:influence of dust and ammonia on the development of air sac lesions in turkey[J].Am J Vet Res,1968,29:1049.
