Growing pigs

Metabolizable energy and amino acid digestibility by growing pigs may be reduced if excessive heat is applied during drying of corn

Corn is harvested at a high moisture level, and thus must be dried to less than 15% moisture to ensure safe storage. Improvements to reduce the energy consumption of the dryers have been implemented, especially by increasing the inlet air temperature. However, overheating may have a negative impact on the stability of nutrients, especially amino acids (AA), because Maillard reactions may occur if heat and moisture are applied to feed ingredients. Consequently, Maillard reactions result in a decrease in the concentration and digestibility of AA, and it is possible that energy digestibility is also reduced. Therefore, the objective of these experiments was to test the hypothesis that both the temperature used in drying and the time that heat is applied will affect the standardized ileal digestibility (SID) of AA, and concentration of digestible energy (DE) and metabolizable energy (ME) in corn fed to growing pigs.

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Standardized total tract digestibility of phosphorus in a new variety of soybeans fed to growing pigs

More than half of P in soybeans are bound to phytate which causes a low digestibility of P when fed to pigs. However, new varieties that have different characteristics are sometimes developed and an example is the Photoseed variety of soybeans that captures more carbon and sunlight leading to a more nutrient rich ingredient and a reduced footprint from crop production. There is, however, no information about the nutritional value of the soybean meal produced from the Photoseed variety of soybeans. Therefore, the objective of this research was to test the hypothesis that the apparent total tract digestibility (ATTD) and the standardized total tract digestibility (STTD) of P is not different in soybean meal produced from Photoseed soybeans compared with control soybean meal when fed to pigs.

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Preference for feed, but not growth performance, is reduced if hybrid rye replaces corn in diets for growing pigs

McGhee, M. L.,  H. H. Stein. 2023. Preference for feed, but not growth performance, is reduced if hybrid rye replaces corn in diets for growing pigs. Animal Feed Science and Technology 296 (2023) 115566. doi.org/10.1016/j.anifeedsci.2022.115566. Link to full text.

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Determination of DE and ME in a new variety of soybeans fed to growing pigs

Soybean meal is the principal amino acid (AA) source in diets for pigs and it also supplies a considerable amount of metabolizable energy close to what is found in corn. However, new varieties that have different characteristics are sometimes developed and an example of such a new variety is the Photoseed variety of soybeans that captures more carbon and sunlight leading to a more nutrient rich ingredient and a reduced footprint from crop production. There is, however, no information about the nutritional value of the soybean meal produced from the Photoseed variety of soybeans. Therefore, the objective of this research was to test the hypothesis that the concentration of digestible energy (DE) and metabolizable energy (ME) are not different in soybean expellers produced from Photoseed soybeans compared with control soybeans when fed to pigs.

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Amino acid digestibility in a new variety of soybeans fed to growing pigs

Soybean meal is the principal amino acid (AA) source in diets for pigs, and it is recognized that the AA profile of soybean meal is superior to that of other oilseed meals. However, new varieties that have different characteristics are sometimes developed and an example of such a new variety is the Photoseed variety of soybeans that captures more carbon and sunlight leading to a more nutrient rich ingredient and a reduced footprint from crop production. There is, however, no information about the nutritional value of the soybean meal produced from the Photoseed variety of soybeans. Therefore, the objective of this research was to test the hypothesis that the apparent ileal digestibility (AID) of crude protein (CP) and AA, and the standardized ileal digestibility (SID) of CP and AA are not different in soybean meal produced from Photoseed soybeans compared with control soybean meal when fed to pigs.

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Effects of Copper on nutrient utilization in growing pigs.

Espinosa, C. D., and H. H. Stein. 2022. Effects of Copper on nutrient utilization in growing pigs. Proc. 21th Annual Midwest Swine Nutrition Conf. Danville, IN, Sep. 8, 2022. Pages 53-57. Link to full text.

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Effect of a novel consensus bacterial 6-phytase variant on inositol hexa-phosphate degradation profile in growing pigs.

Velayudhan, D., T. Christensen, S. Knudsen, L. Marchal, Y. Dersjant-Li, and H. H. Stein. 2022. Effect of a novel consensus bacterial 6-phytase variant on inositol hexa-phosphate degradation profile in growing pigs. 15th International Symposium on Digestive Physiology of Pigs. Animal - Science Proceedings 13(Issue 2): 180. Link to abstract.

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Effects of different watering options on standardized ileal digestibility of amino acids in diets fed to growing pigs

Depending on how facility allows pigs to drink water, considerable amounts of feeds can be wasted, which may affect digestibility of nutrients by pigs. Therefore, the objective of this experiment was to test the hypothesis that different watering options affect the standardized ileal digestibility (SID) of amino acids (AA) in a corn-soybean meal diet fed to growing pigs.

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Effects of two copper sources on oxidative stress, inflammation, and gene abundance on growing pigs

Blavi, L., J. F. Pérez, A. Forouzandeh, F. González, M. de Angelo, A. Roméo, H. H. Stein, and D. Solà. 2021. Effects of two copper sources on oxidative stress, inflammation, and gene abundance on growing pigs. Book of Abstracts. 72nd Ann. Meet. European Fed. Anim.  Sci. Aug. 30 – Sep. 3, 2021, Davos, Switzerland. Page 360.

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High inclusion rates of hybrid rye instead of corn in diets for growing-finishing pigs do not influence the overall growth performance and most carcass traits are not influenced by hybrid rye

McGhee, Molly L., Bailey N. Harsh, and Hans H. Stein. 2021. High inclusion rates of hybrid rye instead of corn in diets for growing-finishing pigs do not influence the overall growth performance and most carcass traits are not influenced by hybrid rye. J. Anim. Sci. 99: 12, 1–8. doi.org/10.1093/jas/skab324. Link to full text.

Effect of the Pelleting Process on Diet Formulations with Varying Levels of Crystalline Amino Acids and Reducing Sugars on Digestibility in Growing Pigs

Dunmire, K. M., D. A. Lopez, C. J. Fiehler, Y. Zhang, C. K. Jones, Y. Li, J. C. Woodworth, R. D. Goodband, M. D. Tokach, C. R. Stark, H. H. Stein, and C. B. Paulk. 2021. Effect of the Pelleting Process on Diet Formulations with Varying Levels of Crystalline Amino Acids and Reducing Sugars on Digestibility in Growing Pigs. J. Anim. Sci. 99(Suppl. 1): 66–67. doi.org/10.1093/jas/skab054.110. Link to Abstract.

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Ileal Digestibility of Amino Acids Is Greater in Sunflower Expellers Than in Sunflower Meal When Fed to Growing Pigs

Ibagon, J. A. S. A. Lee, and H. H. Stein. 2021. Ileal Digestibility of Amino Acids Is Greater in Sunflower Expellers Than in Sunflower Meal When Fed to Growing Pigs. J. Anim. Sci. 99(Suppl. 1): 86–87. doi.org/10.1093/jas/skab054.140. Link to Abstract.

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Effects of Dietary Valine, Isoleucine, and Tryptophan Supplementations to Diets Containing Excess Leucine from Corn Protein on Growth Performance of Growing Pigs

Kwon, W. B., J. A. Soto, and H. H. Stein. 2021. Effects of Dietary Valine, Isoleucine, and Tryptophan Supplementations to Diets Containing Excess Leucine from Corn Protein on Growth Performance of Growing Pigs. J. Anim. Sci. 99(Suppl. 1): 61–62. doi.org/10.1093/jas/skab054.103. Link to Abstract.

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Effects of Dietary Valine, Isoleucine, and Tryptophan Supplementations to Diets Containing Excess Leucine on Nitrogen Balance of Growing Pigs

Kwon, W. B., J. A. Soto, and H. H. Stein. 2021. Effects of Dietary Valine, Isoleucine, and Tryptophan Supplementations to Diets Containing Excess Leucine on Nitrogen Balance of Growing Pigs. J. Anim. Sci. 99(Suppl. 1): 61. doi.org/10.1093/jas/skab054.102. Link to Abstract.

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Optimal tryptophan:lysine Ratio for 25–40 Kg Growing Pigs Fed Diets Containing 35 % Distillers Dried Grains with Solubles

Oliveira, M. S. F., J. K. Htoo, J. C. González-Vega, and H. H. Stein. 2021. Optimal tryptophan:lysine Ratio for 25–40 Kg Growing Pigs Fed Diets Containing 35 % Distillers Dried Grains with Solubles. J.  Anim. Sci. 99(Suppl. 1): 57–58. doi.org/10.1093/jas/skab054.097. (Abstr.). Link to Abstract.

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The Ash in Metacarpals, Metatarsals, and Tibia Is Better Correlated with Total Body Bone Ash Than the Ash in Other Bones of Growing Pigs

Lee, Su A, M. R. Bedford, and H. H. Stein. 2021. The Ash in Metacarpals, Metatarsals, and Tibia Is Better Correlated with Total Body Bone Ash Than the Ash in Other Bones of Growing Pigs. J. Anim. Sci. 99(Suppl. 1): 46–47. doi.org/10.1093/jas/skab054.080. (Abstr.). Link to abstract.

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Effect of a Novel Consensus Bacterial 6-phytase Variant on Mineral Digestibility and Bone Ash in Young Growing Pigs Fed Diets with Different Concentrations of Phytate

Espinosa, C. D., D. E. Velayudhan, Y. Dersjant-Li, and H. H. Stein. 2021. Effect of a Novel Consensus Bacterial 6-phytase Variant on Mineral Digestibility and Bone Ash in Young Growing Pigs Fed Diets with Different Concentrations of Phytate. J. Anim. Sci. 99(Suppl. 1): 45–46, doi.org/10.1093/jas/skab054.079. Link to Abstract.

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Disappearance of dietary fibre in the small intestine, large intestine, and total tract of growing pigs fed corn- or wheat-based diets without or with microbial xylanase

Abelilla, J. J., and H. H. Stein. 2019. Disappearance of dietary fibre in the small intestine, large intestine, and total tract of growing pigs fed corn- or wheat-based diets without or with microbial xylanase. Manipulating Pig Production XVII. Proc. 17th Biennial Conference of the Australasian Pig Sci. Ass. (APSA), Adelaide, Australia, 17-20 Nov. 2019. Adv. Anim.

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Effects of dietary leucine and tryptophan supplementation on serotonin metabolism and growth performance of growing pigs

Tryptophan is an indispensable AA that is often limiting for growth in pigs fed corn-soybean meal-based diets. Tryptophan may act as a regulator of feed intake by enhancing serotonin signaling in the brain, because Trp is a precursor for serotonin. High Trp intake increases feed intake, and this is partly attributed to increased serotonin synthesis. Availability of dietary Trp in the brain is considered the rate-limiting step in hypothalamic serotonin synthesis. However, to be transported into the brain, Trp competes with other large neutral AA such as Val, Leu, Ile, Tyr, and Phe for a common transporter (L-type AA transporter 1) to cross the blood-brain barrier.

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Effects of extrusion on nutrient and energy digestibility in cereal grains fed to growing pigs

Rodriguez, D. A., S. A. Lee, and H. H. Stein. 2019. Effects of extrusion on nutrient and energy digestibility in cereal grains fed to growing pigs. Book of Abstracts. In: 1st International Feed Technology Congress, Cologne, Germany. p. 16. (Abstr.). Link to Abstract.

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