Abstract

Restricting the water intake increased significantly the digestibility of the organic matter of the diet in Hereford steers, but the increase in Zebu steers was small and not significant. Changes in the freezing point of rumen contents were possibly due to increased production of saliva when water was restricted, which in turn may have favoured fermentation and consequently digestibility. The freezing points of the contents of the large intestines indicated differences, between the Hereford and Zebu steers, in the absorption of water and osmotically active substances from the terminal gut. Restricting the water intake increased the absorption of water from the large intestine of both types of steer, but changed the freezing point of the contents only in the Herefords.

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