Whey permeat

Effects of microbial phytase on the apparent and standardized total tract digestibility of calcium in milk co-products fed to growing pigs

Milk co-products are used in pig diets to provide lactose and, in some cases, high quality protein. In addition, milk co-products also provide calcium to the diets. However, this calcium can potentially bind to the phytate contained in the plant ingredients in the diets, which would reduce its digestibility.

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Nutritional value of animal proteins fed to pigs

Rojas, O. J. and H. H. Stein. 2012. Nutritional value of animal proteins fed to pigs. Pages 9-24 in Proc. Midwest Swine Nutr. Conf. Indianapolis, IN, Sep. 13, 2012. Link to full text (.pdf)

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Energy concentration and phosphorus digestibility in whey powder, whey permeate, and low-ash whey permeate fed to weanling pigs

Kim, B. G., J. W. Lee, and H. H. Stein. 2012. Energy concentration and phosphorus digestibility in whey powder, whey permeate, and low-ash whey permeate fed to weanling pigs. J. Anim. Sci. 90:289-295. Link to full text (.pdf)

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Energy concentration and phosphorus digestibility in whey powder, whey permeate, and low-ash whey permeate fed to weanling pigs

Whey powder is a co-product of the cheese industry, and consists primarily of lactose and protein. The inclusion of whey powder in weanling pig diets improve growth performance; this is believed to be due to the lactose fraction. Because of the demand for whey protein from the human food industry, the protein is sometimes extracted from whey powder. The resulting product is called whey permeate.

Few values for digestible and metabolizable energy in whey permeate have been reported. In addition, the standardized total tract digestibility (STTD) of phosphorus in these ingredients has not been reported. Therefore, two experiments were conducted: the first, to determine the concentrations of digestible and metabolizable energy in whey powder, whey permeate, and low-ash whey permeate; and the second, to determine the apparent and standardized total tract digestibility of phosphorus in the same ingredients.

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