2[2]Owens FN,Secrist D S,Hill W J,et al.Acidosis in cattle:A review[J].J Anim Sci,1998(76):275-286.
3[5]Garrett E F,Pereira N,NordlundL K V.Diagnostic methods for the detection of subacute rumiual acidosis in dairy cows[J].J Dairy Sci,1999(82):1170-1178.
4[6]Mutsvangwa T,Wright T.Sub-Acute ruminal acidosis (SARA)in dairy cows[J].Ministry of Agriculture Food and Rural Affairs Dairy Sci,2003 (85):3454-3461.