Amino acid digestibility

Digestibility of amino acids, fiber, energy, and concentrations of digestible and metabolizable energy in conventional and extruded yellow dent corn, wheat, and sorghum fed to growing pigs

Extrusion of cereal grains may be used to improve nutrient digestibility in cereal grains because addition of heat and pressure in combination with addition of moisture during the extrusion may gelatinize the starch, which results in an increase in starch digestibility. It is also possible that AA and energy digestibility are increased by the extrusion, but data to verify this hypothesis have not been published. Therefore, the objective of these experiments was to test the hypothesis that the ileal digestibility of AA and starch and the apparent total tract digestibility (ATTD) of ADF, NDF, and GE as well as the concentrations of DE and ME in corn, wheat, and sorghum are increased by extrusion.

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Ileal digestibility of amino acids in selected feed ingredients fed to young growing pigs

Casas, G. A., N. W. Jaworski, J. K. Htoo, and H. H. Stein. 2018. Ileal digestibility of amino acids in selected feed ingredients fed to young growing pigs. J. Anim. Sci. 96:2361–2370. Link to abstract

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High-protein distillers dried grains with solubles produced using a novel front-end– back-end fractionation technology has greater nutritional value than conventional distillers dried grains with solubles when fed to growing pigs

Espinosa, C. D. and H. H. Stein. 2018. High-protein distillers dried grains with solubles produced using a novel front-end– back-end fractionation technology has greater nutritional value than conventional distillers dried grains with solubles when fed to growing pigs. J. Anim. Sci. 96:1869-1876. Link to abstract

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Effects of isoquinoline alkaloids on apparent ileal digestibility of amino acids, acid hydrolyzed ether extract, and starch by young growing pigs fed corn-soybean meal diets

Sangrovit G is a phytogenic feed additive derived from Macleaya cordata composed of isoquinoline alkaloids (IQ), primarily sanguinarine, that are believed to benefit animal performance. Sanguinarine has anti-inflammatory, immuno-modulatory, and antimicrobial effects. As a result, inclusion of IQ in diets for pigs may reduce inflammation in the intestine and thereby increase absorption of essential nutrients.

However, there are no data published for the effects of IQ on digestibility of crude protein, amino acids, starch, and lipids in pigs. Therefore, the objective of the experiment was to test the hypothesis that the apparent ileal digestibility (AID) of crude protein, amino acids, acid hydrolyzed ether extract and starch in corn-soybean meal diets fed to young growing pigs increases as IQ is added to the diet.

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Effect of drying method of ileal digesta on the digestibility of crude protein and amino acids by pigs

Lagos, L. V. and H. H. Stein. 2018. Effect of drying method of ileal digesta on the digestibility of crude protein and amino acids by pigs. J. Anim. Sci. 96(Suppl. 2):181 (Abstr.) Link to abstract (.pdf)

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Chemical composition and digestibility of energy, dry matter, amino acids, and fiber in wheat middlings and red dog fed to growing pigs

Casas, G. A., D. A. Rodriguez, and H. H. Stein. 2018. Chemical composition and digestibility of energy, dry matter, amino acids, and fiber in wheat middlings and red dog fed to growing pigs. J. Anim. Sci. 96(Suppl. 2):175-176 (Abstr.) Link to abstract (.pdf)

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High-protein distillers dried grains with solubles produced using a novel front-end-back-end fractionation technology has greater nutritional value than conventional distillers dried grains with solubles when fed to growing pigs

Espinosa, C. D. and H. H. Stein. 2018. High-protein distillers dried grains with solubles produced using a novel front-end-back-end fractionation technology has greater nutritional value than conventional distillers dried grains with solubles when fed to growing pigs. J. Anim. Sci. 96(Suppl. 2):174 (Abstr.) Link to abstract (.pdf)

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Digestibility of amino acids, fiber, and fat and concentrations of digestible and metabolizable energy in two sources of distillers dried grains with solubles fed to growing pigs

Rodriguez, D. A., S. A. Lee, and H. H. Stein. 2018. Digestibility of amino acids, fiber, and fat and concentrations of digestible and metabolizable energy in two sources of distillers dried grains with solubles fed to growing pigs. J. Anim. Sci. 96(Suppl. 2):173-174 (Abstr.) Link to abstract (.pdf)

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Digestibility of amino acids, energy, fat, and fiber and digestible and metabolizable energy in low-oil distillers dried grains with solubles fed to growing pigs

Lee, S. A., C. D. Espinosa, and H. H. Stein. 2018. Digestibility of amino acids, energy, fat, and fiber and digestible and metabolizable energy in low-oil distillers dried grains with solubles fed to growing pigs. J. Anim. Sci. 96(Suppl. 2):172-173 (Abstr.) Link to abstract (.pdf)

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Effects of Sangrovit® Extra on apparent ileal digestibility of amino acids, crude protein, acid hydrolyzed ether extract and starch by weanling pigs fed corn-soybean meal diets

Rundle, C. M. and H. H. Stein. 2018. Effects of Sangrovit® Extra on apparent ileal digestibility of amino acids, crude protein, acid hydrolyzed ether extract and starch by weanling pigs fed corn-soybean meal diets. J. Anim. Sci. 96(Suppl. 2):152 (Abstr.) Link to abstract (.pdf)

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Amino acid digestibility of a modified corn byproduct (Gold Pro) with and with a multi-enzyme supplement (CORE) when fed to weanling pigs

Soltwedel, K. T., F. B. Sandberg, W. B. Kwon, H. H. Stein, S. J. England, M. R. Bible, T. M. Fakler, and J. Y. Jacela. 2018. Amino acid digestibility of a modified corn byproduct (Gold Pro) with and with a multi-enzyme supplement (CORE) when fed to weanling pigs. J. Anim. Sci. 96(Suppl. 2):150 (Abstr.) Link to abstract (.pdf)

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Young Scholar Presentation: Nutritional value of rice coproducts fed to pigs

Casas, G. A. and H. H. Stein. 2018. Young Scholar Presentation: Nutritional value of rice coproducts fed to pigs. J. Anim. Sci. 96(Suppl. 2):143 (Abstr.) Link to abstract (.pdf)

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Standardized ileal digestibility of amino acids in three sources of hybrids of rye and in barley, wheat, and corn fed to growing pigs

McGhee, M. L. and H. H. Stein. 2018. Standardized ileal digestibility of amino acids in three sources of hybrids of rye and in barley, wheat, and corn fed to growing pigs. J. Anim. Sci. 96(Suppl. 2):142 (Abstr.) Link to abstract (.pdf)

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Effects of various heat treatments on concentrations of digestible and metabolizable energy and on amino acid digestibility in soybean meal fed to growing pigs

Mathai, J. K., J. K. Htoo, M. Wiltafsky, and H. H. Stein. 2018. Effects of various heat treatments on concentrations of digestible and metabolizable energy and on amino acid digestibility in soybean meal fed to growing pigs. J. Anim. Sci. 96(Suppl. 2):25-26 (Abstr.) Link to abstract (.pdf)

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Ileal digestibility of amino acids and starch in hybrid rye compared with other cereal grains fed to pigs

Hybrid rye is grown in Europe, Canada, and the United States, and compared with conventional rye, it has increased yields and reduced risk of ergot contamination, making it an interesting ingredient in the feeding of pigs. However, there is limited information about the nutritional value of hybrid rye when fed to pigs. Therefore, the objective of the experiment was to determine the standardized ileal digestibility (SID) of crude protein and amino acids, as well as the apparent ileal digestibility (AID) of starch in hybrid rye compared with barley, wheat, and corn.

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Procedures for determining digestibility of amino acids, lipids, starch, fibre, phosphorus, and calcium in feed ingredients fed to pigs

Stein, H. H. 2017. Procedures for determining digestibility of amino acids, lipids, starch, fibre, phosphorus, and calcium in feed ingredients fed to pigs. Anim. Prod. Sci. 57:2317-2324. Link to abstract

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Digestibility of crude protein and amino acids in Dakota Gold distillers dried grains with solubles (DDGS) fed to pigs is greater than in conventional DDGS

Distillers dried grains with solubles (DDGS) is a co-product of ethanol production. In recent years, companies that produce DDGS have begun to remove some of the corn oil for use in biodiesel production. Conventional DDGS contains 10-12% fat, compared with 6-9% in low-oil DDGS.

Research has shown that adding fat to diets fed to pigs increases the digestibility of amino acids in the diets. However, there is limited information about how reduced oil concentration in DDGS influences the digestibility of protein when fed to pigs. An experiment was conducted to compare the standardized ileal digestibility (SID) of crude protein and amino acids in conventional DDGS and in the low-oil DDGS product Dakota Gold, which is produced using a process that does not involve heating.

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Comparative ileal digestibility of amino acids in 00-rapeseed meal and rapeseed meal fed to growing male broilers

Ullah, Z., Z. U. Rehman, Y. Yin, H. H. Stein, Z. Hayat, G. Ahmed, M. U. Nisa, M. Akhtar, and M. Sarwar. 2017. Comparative ileal digestibility of amino acids in 00-rapeseed meal and rapeseed meal fed to growing male broilers. Poult. Sci. 96:2736–2742. Link to full text (.pdf)

Ileal digestibility of amino acids in low-oil DDGS fed to growing pigs

Distillers dried grains with solubles (DDGS) are fed to pigs as a source of energy and amino acids. In recent years, ethanol plants have begun recovering corn oil from DDGS to sell for biodiesel and other uses. Conventional corn DDGS contains 10-12 fat, compared with 5-9% fat in low oil DDGS. Previous research in our lab showed that amino acid digestibility was reduced in low oil DDGS compared with conventional DDGS, but that research used DDGS from only one supplier. An experiment was conducted to compare the digestibility of amino acids in low oil DDGS sourced from multiple different suppliers.

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The ileal digestibility of most amino acids is greater in red dog than in wheat middlings when fed to growing pigs

Casas, G. A. and H. H. Stein. 2017. The ileal digestibility of most amino acids is greater in red dog than in wheat middlings when fed to growing pigs. J. Anim. Sci. 95:2718-2725. Link to full text (.pdf)

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