Effects of ruminally degradable and escape protein supplements on steers grazing summer native range

Article Abstract:

Steers grazing a summer native range and fed ruminally degradable and escape proteins supplements were compared with those fed cornstarch and molasses supplement (energy control). An increase in daily weight gain was seen in steers fed the protein supplements. Forage analyses showed that the escape protein was affected by month and year effects and their interactions. In vitro studies show that more microbial protein was derived from energy control than from degradable protein supplement, which may explain the limited weight gains of steers fed degradable protein supplements.

Beef cattle, Dietary protein, Rumen fermentation, Proteins in animal nutrition

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Dietary selenate versus selenite for cattle, sheep, and horses

Article Abstract:

The bioavailability of selenate and selenite were compared in cattle, sheep and horses. There were only minor differences between the two forms used when serum, skeletal muscle and liver selenium (Se) as well as serum glutathione peroxidase activities were measured. The serum Se level increased with the duration of Se supplementation. A dietary supplementation of .3 mg of Se per kilogram of dietary dry matter of either selenate or selenite forms can support normal serum levels of Se in the three species.

Horses, Cattle, Sheep, Selenium (Nutrient), Selenite, Selenium in animal nutrition

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