Amino acid digestibility

Effect of Sal CURB on digestibility of energy and nutrients by growing pigs

Liu, Y. and H. H. Stein. 2015. Effect of Sal CURB on digestibility of energy and nutrients by growing pigs. J. Anim. Sci. 93(Suppl. s3):855-856 (Abstr.) Link to abstract (.pdf)

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Concentrations of nitrogen-corrected apparent metabolizable energy and amino acid digestibility in soybean meal from Argentina, Brazil, China, Thailand, and the United States fed to broilers

Sotak-Peper, K. M., R. C. Sulabo, C. M. Parsons, and H. H. Stein. 2015. Concentrations of nitrogen-corrected apparent metabolizable energy and amino acid digestibility in soybean meal from Argentina, Brazil, China, Thailand, and the United States fed to broilers. J. Anim. Sci. 93(Suppl. s3):299 (Abstr.) Link to abstract (.pdf)

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Determination of amino acid digestibility in soybean meal from different regions of the United States and fed to pigs

Soybeans grown in the northern United States are exposed to fewer growing days and hours of sunlight than soybeans grown elsewhere in the U.S. As a result, soybeans grown in the northern U.S. fix less nitrogen, and have a lower concentration of crude protein, than other U.S. soybeans. However, the concentrations of particular amino acids, particularly indispensable amino acids, are more important for the purposes of diet formulation than the concentration of crude protein. The concentration of amino acids in soybeans grown in different parts of the U.S. has not been determined.

The amount of amino acids in soybean meal that are available to the pig also depends on digestibility, but no research has been conducted to compare the digestibility of amino acids among soybean meal produced in different regions of the U.S. Therefore, an experiment was conducted to compare the standardized ileal digestibility (SID) of amino acids and the concentration of SID amino acids in soybean meal produced in different regions within the United States and fed to growing pigs.

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Energy concentration and amino acid digestibility in high-protein canola meal, conventional canola meal, and soybean meal fed to growing pigs

Berrocoso, J. D., O. J. Rojas, Y. Liu, J. Shoulders, J. C. González-Vega, and H. H. Stein. 2015. Energy concentration and amino acid digestibility in high-protein canola meal, conventional canola meal, and soybean meal fed to growing pigs. J. Anim. Sci. 93:2208-2217. Link to full text (.pdf)

Concentrations of nitrogen-corrected apparent metabolizable energy and amino acid digestibility in soybean meal from Argentina, Brazil, China, Thailand and the United States fed to broilers

The nutritional value of soybean meal from different sources may vary due to differences in processing techniques and environmental conditions such as growing areas, soil type, and variety of soybeans. The Philippines import soybean for livestock feed from many different countries. However, the nutritional quality of soybean meal from these different origins has not been compared. It is important for producers formulating diets in the Philippines to know whether the same values can be used in formulations for all sources of imported soybean meal. Therefore, two experiments were conducted to determine the concentrations of apparent metabolizable energy (AME) and nitrogen-corrected apparent metabolizable energy (AMEn), and the standardized ileal digestibility (SID) of amino acids by broilers fed soybean meal from Argentina, Brazil, China, Thailand, and the United States.

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Effect of Sal CURB® on digestibility of energy, amino acids, calcium, and phosphorus in growing pigs

Porcine epidemic diarrhea virus (PEDV) can be spread via contaminated feed. Treating PEDV-contaminated feed with formaldehyde has been shown to prevent infection in pigs that consume the feed. However, concerns have been raised about the effect of treatment with formaldehyde on the nutritional value of feedstuffs. Therefore, an experiment was conducted to determine the effects of adding a formaldehyde-based feed disinfectant to the diet on the apparent ileal digestibility (AID) of dry matter, crude protein, and amino acids, and the apparent total tract digestibility (ATTD) of dry matter, gross energy (GE), calcium, and phosphorus in nursery pigs.

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Amino acid digestibility in rice coproducts fed to growing pigs

Casas, G. A., J. Almeida, and H. H. Stein. 2015. Amino acid digestibility in rice coproducts fed to growing pigs. J. Anim. Sci. 93(Suppl. 2):136 (Abstr.) Link to abstract (.pdf)

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Concentration of metabolizable energy and digestibility of energy, phosphorus, and amino acids in lemna protein concentrate fed to growing pigs

Rojas, O. J., Y. Liu, and H. H. Stein. 2014. Concentration of metabolizable energy and digestibility of energy, phosphorus, and amino acids in lemna protein concentrate fed to growing pigs. J. Anim. Sci. 92:5222-5229. Link to full text (.pdf)

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Energy concentration and amino acid digestibility in corn and corn coproducts from the wet-milling industry fed to growing pigs

Liu, Y., M. Song, F. N. Almeida, S. L. Tilton, M. J. Cecava, and H. H. Stein. 2014. Energy concentration and amino acid digestibility in corn and corn coproducts from the wet-milling industry fed to growing pigs. J. Anim. Sci. 92:4557-4565. Link to full text (.pdf)

Amino acid digestibility and concentration of digestible and metabolizable energy in a threonine biomass product fed to weanling pigs

Almeida, F. N., R. C. Sulabo, and H. H. Stein. 2014. Amino acid digestibility and concentration of digestible and metabolizable energy in a threonine biomass product fed to weanling pigs. J. Anim. Sci. 92:4540-4546. Link to full text (.pdf)

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Amino acid digestibility in rice co-products fed to growing pigs

Global production of rice is third in terms of total tonnage after corn and wheat. Rice is grown to produce polished white rice for human consumption. However, harvested rice, called paddy rice or rough rice, needs to be dehulled, which results in production of brown rice. The outer brown bran layer of brown rice, known as rice bran, also needs to be removed before polished white rice is produced. Approximately 20% of the paddy rice is hulls and the bran fraction is 8 to 10%, so only 70% of the paddy rice will become polished rice. Rice bran is high in fiber, and also contains about 15% crude protein and 14 to 20% fat. Rice bran can be fed as full fat rice bran or defatted rice bran. During milling of the rice, some kernels may get broken and cannot be used for human consumption. These broken kernels are known as broken rice or brewers rice and may also be used in animal feeding. Broken rice is high in starch and contains little fat, fiber, or protein.

Both rice bran and broken rice may be fed to pigs, but these ingredients are poorly characterized in terms of nutritional value. An experiment was, therefore, conducted to determine the standardized ileal digestibility (SID) of crude protein and amino acids in broken rice, two sources of full fat rice bran (FFRB), and defatted rice bran (DFRB) fed to growing pigs.

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Digestibility of energy and concentrations of digestible and metabolizable energy in processed soybean and rapeseed products fed to growing pigs

Soybean meal is the most common source of protein in swine diets in the United States. However, conventional soybean meal contains antinutritional factors such as antigenic proteins, oligosaccharides, lectins, and trypsin inhibitors that limit its use in diets fed to weanling pigs. Methods of processing soybean meal to remove antinutritional factors have been developed. These include enzyme treatment, fermentation, and the removal of soluble carbohydrates.

Like soybean meal, rapeseed products are usually not fed to weanling pigs due to the presence of glucosinolates and relatively high concentrations of fiber in these products. Previous research has shown that fermentation of soybean meal can reduce antinutritional factors and fiber concentrations. An experiment was conducted to determine the apparent total tract digestibility (ATTD) of energy and concentrations of digestible (DE) and metabolizable (ME) energy in four sources of processed soybean products, conventional soybean meal, conventional 00-rapeseed expellers, and in a fermented mixture of co-products including 00-rapeseed expellers, wheat bran, potato peel, and soy molasses.

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Different corn hybrids fed to growing pigs. II. Concentrations and digestibility of amino acids

Liu, Y., R. C. Sulabo, T. E. Sauber, and H. H. Stein. 2014. Different corn hybrids fed to growing pigs. II. Concentrations and digestibility of amino acids. J. Anim. Sci 92(E-Suppl. 2):668 (Abstr.) Link to abstract (.pdf)

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Amino acid digestibility in field peas, fish meal, corn, soybean meal, and soybean hulls

Mathai, J. K. and H. H. Stein. 2014. Amino acid digestibility in field peas, fish meal, corn, soybean meal, and soybean hulls. J. Anim. Sci 92(E-Suppl. 2):648 (Abstr.) Link to abstract (.pdf)

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Digestibility of amino acids in distillers dried grains with solubles produced in Europe from wheat, maize, or mixtures of wheat and maize and fed to growing pigs

Curry, S. M., J. K. Htoo, H. V. Masey O'Neill, and H. H. Stein. 2014. Digestibility of amino acids in distillers dried grains with solubles produced in Europe from wheat, maize, or mixtures of wheat and maize and fed to growing pigs. J. Anim. Sci 92(E-Suppl. 2):643 (Abstr.) Link to abstract (.pdf)

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Procedures and methodology for determining standard ileal digestibility (SID) amino acid digestibility of feedstuffs

Stein, H. H. 2014. Procedures and methodology for determining standard ileal digestibility (SID) amino acid digestibility of feedstuffs. J. Anim. Sci 92(E-Suppl. 2):377 (Abstr.) Link to abstract (.pdf)

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Comparative digestibility of energy and nutrients in feed ingredients fed to sows and growing pigs

Lowell, J. E., Y. Liu, and H. H. Stein. 2014. Comparative digestibility of energy and nutrients in feed ingredients fed to sows and growing pigs. J. Anim. Sci 92(E-Suppl. 2):226 (Abstr.) Link to abstract (.pdf)

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Amino acid digestibility in processed soybean products and rapeseed products fed to weanling pigs

Navarro, D. M. D. L., Y. Liu, T. S. Bruun, and H. H. Stein. 2014. Amino acid digestibility in processed soybean products and rapeseed products fed to weanling pigs. J. Anim. Sci 92(E-Suppl. 2):221 (Abstr.) Link to abstract (.pdf)

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Energy concentration and amino acid digestibility in two sources of canola meal fed to growing pigs

Jaworski, N. W., Y. Liu, and H. H. Stein. 2014. Energy concentration and amino acid digestibility in two sources of canola meal fed to growing pigs. J. Anim. Sci 92(E-Suppl. 2):220 (Abstr.) Link to abstract (.pdf)

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Digestibility by growing pigs of amino acids in canola meal from North America and 00-rapeseed meal and 00-rapeseed expellers from Europe

Maison, T. and H. H. Stein. 2014. Digestibility by growing pigs of amino acids in canola meal from North America and 00-rapeseed meal and 00-rapeseed expellers from Europe. J. Anim. Sci. 92:3502-3514. Link to full text (.pdf)

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