Abstract
Eighteen Holstein dairy cows averaging 141 days in milk were used in a complete randomized design to determine the effects of feeding liquid acid whey (LAW) on milk production and composition. Animals received a diet consisting of berseem clover (Trifolium alexandrinum., L), wheat straw and concentrate (Control). Treatments were control and control plus 40 liters/cow/day of LAW. Daily individual Dry Matter Intake (DMI) and milk production were measured. Diet digestibility was determined using the total collection method. Results showed that LAW increased (P 0,05) for both treatments. It can be concluded that including LAW in dairy diets, in a partial replacement of the concentrate, significantly improved FCM and milk fat and protein yields without affecting milk composition. Key words: Dairy cow, whey, milk yield, milk composition.
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