Sodium play a important role in maintaining acid-base balance in the body, normal body fluid osmotic pressure and regulation of body fluid volume.

  The sodium ion that dischare with the form of bicarbonate and saliva have the inhibiting effect on the excess acid that generated by Rumen, reticulum and omasal and create a suitable environment for the rumen micerobial activity.

  Chlorine and sodium can maintain the osmotic pressure of extracellular fluid in coordination, involved the formation of gastrinc acid and ensure the PH of the demands of the pepsin activity.