Lee

Alternative nutrition strategies to control post-weaning diarrhea

Cristobal M., Su A Lee, L. Blavi and H. H. Stein. 2019. Alternative nutrition strategies to control post-weaning diarrhea. Farm Journals Pork. October 2019. Link to full text.

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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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Effects of heat treatment on digestibility of amino acids and concentration of metabolizable energy in soybean meal fed to pigs

Lee, S. A., M. S. F. Oliveira, W. B. Kwon, and H. H. Stein. 2019. Effects of heat treatment on digestibility of amino acids and concentration of metabolizable energy in soybean meal fed to pigs. Book of Abstracts. In: 1st International Feed Technology Congress, Cologne, Germany. p. 33. (Abstr.). Link to Abstract.

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Effects of graded levels of phytase on digestibility of nutrients, growth performance, and bone ash in corn and soybean meal based diets fed to pigs

Lee, S. A., and H. H. Stein. 2019. Effects of graded levels of phytase on digestibility of nutrients, growth performance, and bone ash in corn and soybean meal based diets fed to pigs. In: 80th Minnesota Nutrition Conference, Mankato, MN, Sep. 18-19, 2019. P. 25. (Abstr.). Link to abstract

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Balance calcium effect on phosphorus in late-gestation sows’ diets

Lee, Su A, and H. H. Stein. 2019. Balance calcium effect on phosphorus in late-gestation sows’ diets. National Hog Farmer. August 29, 2019. Link to full text

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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, C. Jones, J. K. Htoo, and H. H. Stein. 2019. Effects of extrusion on nutrient and energy digestibility in cereal grains fed to growing pigs. In: 6th EAAP International Symposium on Energy and Protein Metabolism and Nutrition, Belo Horizonte, Minas Gerais, Brazil, Sep. 9-12, 2019. Pages 185-186. (Abstr.). Link to full text

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PSIV-13 Basal endogenous loss, standardized total tract digestibility, and retention of Ca in sows change throughout gestation, but microbial phytase reduces basal endogenous loss of Ca by gestating sows

Lee Su A., Carrie L. Walk, Hans H. Stein. 2019. PSIV-13 Basal endogenous loss, standardized total tract digestibility, and retention of Ca in sows change throughout gestation, but microbial phytase reduces basal endogenous loss of Ca by gestating sows. Journal of Animal Science, Volume 97, Issue Supplement_2, July 2019, Pages 185–186. (Abstr.). Link to abstract.

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PSIII-18 Standardized total tract digestibility of Ca by growing pigs in different sources of calcium carbonate and dicalcium phosphate

Lee Su A., Carrie L. Walk, Hans H. Stein. 2019. PSIII-18 Standardized total tract digestibility of Ca by growing pigs in different sources of calcium carbonate and dicalcium phosphate. Journal of Animal Science, Volume 97, Issue Supplement_2, July 2019, Pages 173–174. (Abstr.). Link to abstract.

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

Rodriguez Diego A., Su A Lee, Mary B. Muckey, Cassandra K. Jones, and Hans H. Stein. 2019. Digestibility of amino acids, fiber, and energy, and concentrations of digestible and metabolizable energy in conventional and extruded yellow dent corn, wheat, and sorghum fed to growing pigs. Journal of Animal Science, Volume 97, Issue Supplement_2, July 2019, Pages 85–86. (Abstr.). Link to abstract.

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Standardized total tract digestibility of calcium varies among sources of calcium carbonate, but not among sources of dicalcium phosphate, but microbial phytase increases calcium digestibility in calcium carbonate

Lee, Su A, L. Vanessa Lagos, Carrie L. Walk, and Hans H. Stein. 2019. Standardized total tract digestibility of calcium varies among sources of calcium carbonate, but not among sources of dicalcium phosphate, but microbial phytase increases calcium digestibility in calcium carbonate. J. Anim. Sci. 2019.97:3440–3450.

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Evaluation of adaptation times and indigestible markers in ileal digestibility studies for pigs

Values for digestibility of nutrients in diets or feed ingredients fed to pigs are determined by nutrient intake and nutrient excretion in feces or ileal digesta. Ileal nutrient digestibility is determined using an indigestible marker because complete quantitative collection of ileal digesta is usually not possible. As a consequence, analysis of marker concentration in digesta is critical for accurate calculation of digestibility coefficients. Therefore, a sufficient adaptation period before initiation of ileal digesta collection is also important to make sure that the concentration of the marker in digesta is constant. It is, however, not known if the adaptation period is different among different markers. Therefore, an experiment was conducted to test the hypothesis that adaptation is needed to have constant marker concentrations in ileal digesta from pigs. The second objective was to test the null-hypothesis that apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of AA digestibility and the basal endogenous losses of AA are constant regardless of the indigestible marker used.

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Digestibility of amino acids, energy, acid hydrolyzed ether extract, and neutral detergent fiber, and concentration of digestible and metabolizable energy in low-oil distillers dried grains with solubles fed to growing pigs

Espinosa Charmaine D., Su A. Lee, and Hans H. Stein. 2019. Digestibility of amino acids, energy, acid hydrolyzed ether extract, and neutral detergent fiber, and concentration of digestible and metabolizable energy in low-oil distillers dried grains with solubles fed to growing pigs. Transl. Anim. Sci. 2019.3:662–675. Link to full text

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Influence of the concentration of dietary digestible calcium on growth performance, bone mineralization, plasma calcium, and abundance of genes involved in intestinal absorption of calcium in pigs from 11 to 22 kg fed diets with different concentrations

Lagos L. Vanessa, Su A. Lee, Guillermo Fondevila, Carrie L. Walk, Michael R. Murphy, Juan J. Loor and Hans H. Stein. 2019. Influence of the concentration of dietary digestible calcium on growth performance, bone mineralization, plasma calcium, and abundance of genes involved in intestinal absorption of calcium in pigs from 11 to 22 kg fed diets with different concentrations of digestible phosphorus. Journal of Animal Science and Biotechnology. 2019. 10:47.

Grow-Finish diet formulation

Lee, Su A, L. V. Lagos, and H. H. Stein. 2019. Grow-Finish diet formulation. National Hog Farmer, Blue Print Issue, From Farrow to Finish. April, 2019. Pages 20-22. Link to full text.

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Digestibility, retention of Ca and P changes during gestation

Lee, Su A, and H. H. Stein. 2019. Digestibility, retention of Ca and P changes during gestation. National Hog Farmer. January 31, 2019. Link to full text.

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Sows in mid-gestation have reduced digestibility and retention of calcium and phosphorus compared with growing pigs

Lee, S., C. Walk, and H. Stein. 2018. Sows in mid-gestation have reduced digestibility and retention of calcium and phosphorus compared with growing pigs. 14th International Symposium on Digestive Physiology of Pigs. Adv. Anim. Biosci. Volume 9, Issue S2, 9:S193-194. (Abstr.). Link to abstract

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Basal endogenous loss, standardized total tract digestibility of calcium in calcium carbonate, and retention of calcium in gestating sows change during gestation, but microbial phytase reduces basal endogenous loss of calcium

Lee, Su A, L. Vanessa Lagos, Carrie L. Walk, and Hans H. Stein. 2019. Basal endogenous loss, standardized total tract digestibility of calcium in calcium carbonate, and retention of calcium in gestating sows change during gestation, but microbial phytase reduces basal endogenous loss of calcium. J. Anim. Sci. 2019.97:1712–1721. Link to full text.

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Effect of decreasing protein levels in diets fed to weanling pigs on growth performance, fecal score, and carcass characteristics

Diarrhea is one of the main problems for pigs during the post-weaning period. Traditionally, antibiotic growth promoters have been used to control post-weaning diarrhea, but consumers are increasingly concerned about this practice and there is therefore an interest in feeding diets that contain no antibiotics. However, feeding pigs without antibiotic growth promoters requires alternative strategies to control post-weaning diarrhea, but feeding low protein diets may be one way to reduce the incidence of post-weaning diarrhea. However, there is a lack of knowledge about consequences of reducing the protein level in diets fed to weanling pigs.

Feeding low protein diets to pigs results in increased net energy in the diet, reduced water intake by pigs, and reduced nitrogen excretion. This will result in reduced volume of manure and also reduced concentrations of ammonium in manure. However, if formulation of low protein diets results in feeding diets with concentrations of indispensable AA that are below the requirements, deposition of protein in pigs may be greater and deposition of fat may be increased compared with pigs fed a diet containing higher level of protein. However, it is not known if feeding a diet low in protein to weanling pigs also results in changes in carcass characteristics of market pigs.

Therefore, the objective of this experiment was to test the hypothesis that feeding a low-protein diet to pigs during the post-weaning period will result in reduced diarrhea during this period, but no effects on growth performance from wean to finish and no changes in carcass composition of pigs when they reach market weight.

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Digestible calcium and digestible phosphorus in swine diets

Lee, S. A., L. V. Lagos, and H. H. Stein. 2019. Digestible calcium and digestible phosphorus in swine diets. In Proc. London Swine Conference, London, ON, Canada. March 26-27, 2019. Pages 63-72. Link full text(.pdf)

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Effect of dietary calcium on growth performance of growing pigs

Lee, S. A., Vanessa Lagos, and Hans H. Stein. 2018. Effect of dietary calcium on growth performance of growing pigs. Pages 173 - 184. XXXIV Specialization Course FEDNA, Madrid, Nov. 22 - 23, 2018. Link to full text (.pdf)

 

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