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Meat and Bone Meal as a Protein Supplement for Lactating Dairy Cattle¹

Alaska Agricultural Experiment Station, Palmer

ABSTRACT

Forty-eight cows were used in two switchback feeding trials to compare animal performance on concentrate rations high in meat and bone meal, on conventional dairy mixtures, and on barley alone. Although isolated incidents of feed refusal occurred, rations containing animal protein were palatable. Silage intake was depressed when ground barley was the only concentrate fed (P < 0.01). It was also depressed when meat and bone meal was used in Trial 1 (P < 0.05), but was unaffected in the second trial. Milk production was lowest on barley and ranged from minimal to 1.6 lb per day higher on commercial rations than on the simple, barley-oat mixtures supplemented with animal and plant proteins and urea used in these experiments.

¹ Research supported in part by the Tropical and Subarctic Research Programs, Crops Research Division, ARS, USDA.