Stein

Practical feeding: Formulating swine diets to meet Ca and P requirements

Manaig, Y. J. Y., and H. H. Stein. 2024. Practical feeding: Formulating swine diets to meet Ca and P requirement. Feed Strategy, May-June edition. Page 30-32. Link to full text.

 

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Effects of increasing dietary protein on standardized ileal digestibility of amino acids in diets fed to growing pigs

Apparent ileal digestibility (AID) of amino acids (AA) is affected by dietary AA levels because of different contributions of endogenous AA to the ileal digesta from pigs fed diets with different levels of AA. Because of the influence of dietary protein and AA on calculated values for AID, values for AID obtained in individual feed ingredients are not always additive in mixed diets. Therefore, values for standardized ileal digestibility (SID) of AA, which are corrected for the basal ileal endogenous losses of AA, are used in diet formulations to avoid the influence of endogenous AA on digestibility values, and SID values are, therefore, additive in mixed diets.

When the direct procedure is used to determine AA digestibility, diets containing cereal grains are sometimes formulated to contain AA below the requirement. In contrast, if the SID of oilseed meals or other protein-rich ingredients are determined, concentrations of AA may be at or above the requirement. Because the influence of the basal endogenous losses of AA is eliminated in the calculations of SID values, it is assumed that values for SID are not influenced by dietary concentrations of AA. However, to our knowledge this hypothesis has not been experimentally verified, but it is an important question because it may influence how diets used in digestibility experiments are formulated. Therefore, four experiments were conducted to test the hypothesis that the SID of AA by growing pigs is not influenced by dietary AA levels.

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Feed preference of weanling pigs fed diets containing extruded corn ground to different particle sizes

Extrusion results in increased digestibility of energy, which is primarily due to increased gelatinization of starch. Because this process improves flavor of cereal grains, it is known that extrusion improves palatability in pig diets. Particle size reduction in cereal grains results in an improved digestibility of nutrients due to increased surface area of grains, which subsequently increases the interaction with digestive enzymes. However, because grinding changes the textural traits of grains, the palatability of feeds is low and thus feed intake of pigs is often reduced.

The feed preference of pigs may be influenced by the characteristics of feed ingredients included in diets, but it is not known if different particle size of extruded corn affects the feed preference of weanling pigs. Therefore, the objective was to test the null hypothesis that there were no effects of reducing particle size of extruded corn on feed preference by weanling pigs.

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Is there a nutritional difference in full-fat soybeans fed to growing pigs?

Ruiz-Arias, N. C., S. A. Lee, and H. H. Stein. 2024. Is there a nutritional difference in full-fat soybeans fed to growing pigs? National Hog Farmer. On-line.

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Influence of a novel phytase on Ca and P digestibility in diets fed to sows in late-gestation and lactation

Espinosa Charmaine D., Leidy J. Torres-Mendoza, Jonathan R. Bergstrom, Hans H. Stein. 2024. Influence of a novel phytase on Ca and P digestibility in diets fed to sows in late-gestation and lactation. Animal Feed Science and Technology 309 (2024) 115906. doi.org/10.1016/j.anifeedsci.2024.115906. Link to full text.

Effects of microbial phytase on standardized total tract digestibility of phosphorus in feed phosphates fed to growing pigs

Lopez, Diego A., Su A. Lee, Hans H. Stein. 2022. Effects of microbial phytase on standardized total tract digestibility of phosphorus in feed phosphates fed to growing pigs. J. Anim. Sci. Vol 100, Issue 12, skac350, doi.org/10.1093/jas/skac350. Link to full text.

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Interactive effects of reducing particle size and extrusion on energy digestibility and concentrations of digestible energy and metabolizable energy in corn fed to young pigs

Particle size reduction in cereal grains often results in an improved digestibility of starch due to increased surface area of grains, which subsequently increases the interaction with digestive enzymes. Improvement in the apparent total tract digestibility (ATTD) of gross energy (GE) upon particle size reduction has also been demonstrated in corn and a number of other ingredients when fed to weanling or growing-finishing pigs.

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Influence of particle size and origin of field peas on apparent ileal digestibility of starch and amino acids and standardized ileal digestibility of amino acids when fed to growing pigs

Ibagon, Jimena A., Su A. Lee, C. Martin Nyachoti, and Hans H. Stein. 2024. Influence of particle size and origin of field peas on apparent ileal digestibility of starch and amino acids and standardized ileal digestibility of amino acids when fed to growing pigs. Translational Animal Science, 2024, 8, txae008. doi.org/10.1093/tas/txae008.

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Nutrient composition and digestibility by growing pigs of amino acids and energy vary between wheat middlings from Europe and the United States

Espinosa, Charmaine D., Leidy J. Torres-Mendoza, Hans H. Stein. 2024. Nutrient composition and digestibility by growing pigs of amino acids and energy vary between wheat middlings from Europe and the United States. Animal Feed Science and Technology 309 (2024) 115905. doi.org/10.1016/j.anifeedsci.2024.115905.

Reproductive performance and immune status of sows fed diets containing Olextra 1200 during lactation

The olive oil tree (Olea europaea L.) contains hydrophilic and lipophilic bioactive compounds, which include flavones, phenolic acids, phenolic alcohols, secoiridoids, and hydroxycinnamic acid derivatives. These bioactive compounds have anti-inflammatory, antimicrobial, and antioxidant properties, and therefore, olive-derived plant bioactive compounds may reduce chronic inflammation and intestinal integrity in pigs. Therefore, olive-derived plant bioactive compounds, such as Olextra 1200, may improve health and prevent disease by inhibiting B cell activation and cytokine expression. However, there is a lack of data demonstrating effects of olive extracts on reproductive performance of sows and their offspring. Therefore, the objective of this experiment was to test the hypothesis that dietary supplementation of Olextra 1200 increases reproductive performance as well as the immune status of sows.

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In vitro digestibility of plant-based protein foods and ingredients using the INFOGEST workflow vs standardised values in growing pigs

Gomez-Marin, Cristina, Hans H. Stein, Natalia S. Fanelli, Beatriz Miralles, Isidra Recio. 2023. In vitro digestibility of plant-based protein foods and ingredients using the INFOGEST workflow vs standardised values in growing pigs. International Symposium Dietary Protein for Human Health. Utrecht, The Netherlands Sep 2023. Pag 90. Link to Abstract.

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Estimates of Requirements for Digestible Ca by Growing Pigs

Stein, H. H. 2023. Estimates of Requirements for Digestible Ca by Growing Pigs. Proc. 22nd Annual Midwest Swine Nutrition Conf. Danville, IN, Sep. 8, 2023. Pages 13-17. Link to full text.

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Advantages of Higher Soybean Meal Diets for Pigs

Lee, S. A, and H. H. Stein. 2023. Advantages of Higher Soybean Meal Diets for Pigs. Proc. 22nd Annual Midwest Swine Nutrition Conf. Danville, IN, Sep. 7, 2023. Pages 41-46. Link to the full text.

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Does xylanase impact gestating, lactating sow digestibility?

Acosta, J. P., and H. H. Stein. 2023. Does xylanase impact gestating, lactating sow digestibility? National Hog Farmer. On-line edition. Dec. 21, 2023.

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Chemical composition of barley and co-products from barley, corn, and wheat produced in South-East Asia or Australia

Fanelli, Natalia S., Leidy J. Torres-Mendoza, Jerubella J. Abelilla, and Hans H. Stein. 2023. Chemical composition of barley and co-products from barley, corn, and wheat produced in South-East Asia or Australia. Anim Biosci. Vol. 37, No. 1:105-115. doi.org/10.5713/ab.23.0201 Link to full text.

The Effect of a Novel Consensus Bacterial 6-Phytase Variant on Ileal Digestibility of Energy in Growing Pigs: Meta-Analysis of 4 Trials

Velayudhan, Deepak E., Ester Vinyeta-Punti, Rachael Hardy, Leon Marchal, Charles Martin Nyachoti, Hans H. Stein, Yueming Dersjant-Li. 2023. The Effect of a Novel Consensus Bacterial 6-Phytase Variant on Ileal Digestibility of Energy in Growing Pigs: Meta-Analysis of 4 Trials. J. Anim. Sci., Volume 101, Issue Supplement_2, November 2023, Pages 117–118, doi.org/10.1093/jas/skad341.131. Link to full text.

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Effects of Microbial Phytase on Standardized Total Tract Digestibility of Phosphorus in Feed Phosphates Fed to Growing Pigs

Lopez Diaz, Diego A., Su A Lee, Hans H. Stein. 2023. Effects of Microbial Phytase on Standardized Total Tract Digestibility of Phosphorus in Feed Phosphates Fed to Growing Pigs. J. Anim. Sci., Volume 101, Issue Supplement_2, November 2023, Pages 114–115, doi.org/10.1093/jas/skad341.127. Link to full text.

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