Effects of supplemental protein percentage and feeding level on intake, ruminal fermentation, and digesta passage in beef steers fed prairie hay

Article Abstract:

Grain and oilseed protein supplements were found to be effective in meeting the protein requirements of beef cattle being fed low-nitrogen, high-fiber forage. The levels of ruminal ammonia with a combined grain and oilseed supplement were found to be lower than those in animals fed primarily oilseed supplements. Hay intake and digesta kinetics were only slightly affected by the negative effects of the supplements on fiber digestion. Both types of supplement were found to be effective at the levels used in the study, which were adjusted to body weight.

Beef cattle, Digestion, Animal feeding and feeds, Rumen fermentation

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Feed efficiency, carcass characteristics, and sensory quality of lambs, with or without prolific ancestry, fed diets with different protein supplements

Article Abstract:

Protein supplementation in early life had beneficial effects on the growth and carcass characteristics of all the sheep breeds studied. The lambs had the highest feed utilization efficiency with fish meal and corn gluten-blood meal. Meat from control lambs was found to be juicier than from the test animals, but no other significant differences were found. Breed differences in growth and carcass characteristics and meat quality were accounted for by ancestry, whether prolific or meat-type sheep.

Sheep, Growth, Growth (Physiology), Meat, Feed utilization efficiency, Meat quality

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Effect of ruminal escape protein and fat on nitrogen utilization in lambs exposed to elevated ambient temperatures

Article Abstract:

The addition of supplemental dietary protein with an increased proportion of escape crude protein was beneficial for lambs under thermal stress. The formulation should take into account fermentibility, amino acid composition and intestinal availability of escape crude protein. Supplemental fat was found to have a beneficial effect on nitrogen retention under both thermally neutral and thermally stressed conditions.

Energy metabolism, Dietary fat, Lambs

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