6Anthony N P,BalogJ M,Staudinger F B,et al.Effect ofa urease inhibitor and ceiling fans on ascites in broilers[J].Poultry Science, 1994,73:801 - 809.
7Mahadewn, Sauer F ,Erfle J D.Studies on bovine bacterial urease [J] J Anim Sci, 1976,42:745.
8Piatkowski B,Voigt J.Effect of phosphoric phenyl ester diarnide as inhibitor of the rumen urease of dairy cows.4.Feed intake and milk yield [J]. Archives Tierernahrung, 1981,31 : 181 - 185.
9Vogit J ,Piatkowski B,Bock J.Investigations of the effect of phosphoric phenyl ester diamide as inhibitor of the rumen urease of dairy cows 1.Influence on urea hydro lysis,ammonia release and fermentation in the rumen [J]. Archives Tierernahrung, 1980,30:811-823.
10Whitelaw F G,Milne J S,Wright H A.Urease inhibition in the sheep rumen and its effect on urea and nitrogen metabolism [J].British J Nutr, 1991,66:209 - 225.