Navarro

Addition of hydrogen chloride to collection bags or containers did not change basal endogenous losses or digestibility of amino acid in corn, soybean meal, or wheat middlings fed to growing pigs

Lee, Su A, L. Blavi, D. M. D. L. Navarro, and H. H. Stein. 2021. Addition of hydrogen chloride to collection bags or containers did not change basal endogenous losses or digestibility of amino acid in corn, soybean meal, or wheat middlings fed to growing pigs. Journal of Animal Science. 99(Suppl. 1):166-167. doi.org/10.1093/jas/skab054.281. Link to abstract.

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Addition of hydrochloric acid to collection bags or collection containers did not change basal endogenous losses or ileal digestibility of amino acid in corn, soybean meal, or wheat middlings fed to growing pigs

Lee, Su A, Laia Blavi, Diego M. D. L. Navarro, and Hans H. Stein. 2021. Addition of hydrochloric acid to collection bags or collection containers did not change basal endogenous losses or ileal digestibility of amino acid in corn, soybean meal, or wheat middlings fed to growing pigs. Animal Bioscience Vol. 34, No. 10:1632-1642 October 2021. doi.org/10.5713/ab.20.0838.

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Technical note: concentrations of soluble, insoluble, and total dietary fiber in feed ingredients determined using Method AOAC 991.43 are not different from values determined using Method AOAC 2011.43 with the AnkomTDF Dietary Fiber Analyzer

Nguyen, Nga, Marc Jacobs, Juntao Li, Chengfei Huang, Defa Li, Diego M. D. L. Navarro, Hans H. Stein, and Neil W. Jaworski. 2019. Technical note: concentrations of soluble, insoluble, and total dietary fiber in feed ingredients determined using Method AOAC 991.43 are not different from values determined using Method AOAC 2011.43 with the AnkomTDF Dietary Fiber Analyzer. J. Anim. Sci. 2019.97:3972–3983.

High fiber ingredients may negatively affect DE and ME concentration

Navarro, D. M. D. L., and H. H. Stein. 2018. High fiber ingredients may negatively affect DE and ME concentration. National Hog Farmer, On line edition, May 31, 2018. Link to full text.

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Structures and characteristics of carbohydrates in diets fed to pigs: a review

Navarro Diego M. D. L., Jerubella J. Abelilla, and Hans H. Stein. 2019. Structures and characteristics of carbohydrates in diets fed to pigs: a review. Journal of Animal Science and Biotechnology, 2019, 10:39. Link to full text.

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Effects of inclusion rate of high fiber dietary ingredients on apparent ileal, hindgut, and total tract digestibility of dry matter and nutrients in ingredients fed to growing pigs

Navarro D. M. D. L., E. M. A. M. Bruininx, L. de Jong, H. H. Stein. 2019. Effects of inclusion rate of high fiber dietary ingredients on apparent ileal, hindgut, and total tract digestibility of dry matter and nutrients in ingredients fed to growing pigs. Anim. Feed Sci. Technol. 248: 1 - 9. Link to full text.

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Amino acid digestibility in six sources of meat and bone meal, blood meal, and soybean meal fed to growing pigs

Navarro D.M.D.L., J.K. Mathai, N.W. Jaworski, H.H. Stein. 2018. Amino acid digestibility in six sources of meat and bone meal, blood meal, and soybean meal fed to growing pigs. Can. J. Anim. Sci. 98: 860–867. Link to full text

Non-antibiotic feed additives in diets for pigs: A review

Yanhong Liu, Charmaine D. Espinosa, Jerubella J. Abelilla, Gloria A. Casas, L. Vanessa Lagos, Su A. Lee, Woong B. Kwon, John K. Mathai, Diego M.D.L. Navarro, Neil W. Jaworski, Hans H. Stein. 2018. Non-antibiotic feed additives in diets for pigs: A review. Anim. Nutr. 4:113-125. Link to full text (.pdf)

Effects of physicochemical characteristics of feed ingredients on the apparent total tract digestibility of energy, DM, and nutrients by growing pigs

Navarro, D. M. D. L., E. M. A. M. Bruininx, L. de Jong, and H. H. Stein. 2018. Effects of physicochemical characteristics of feed ingredients on the apparent total tract digestibility of energy, DM, and nutrients by growing pigs. J. Anim. Sci. 96:2265–2277. Link to abstract

The contribution of digestible and metabolizable energy from high-fiber dietary ingredients is not affected by inclusion rate in mixed diets fed to growing pigs

Navarro, D. M. D. L., E. M. A. M. Bruininx, L. de Jong,  and H. H. Stein. 2018. The contribution of digestible and metabolizable energy from high-fiber dietary ingredients is not affected by inclusion rate in mixed diets fed to growing pigs. J. Anim. Sci. 96:1860-1868. Link to abstract

Effects of inclusion rate of high fiber dietary ingredients on apparent ileal, hindgut, and total tract digestibility of dry matter and nutrients in mixed diets fed to growing pigs

Navarro, D. M. D. L., E. M. A. M. Bruininx, L. de Jong, and H. H. Stein. 2018. Effects of inclusion rate of high fiber dietary ingredients on apparent ileal, hindgut, and total tract digestibility of dry matter and nutrients in mixed diets fed to growing pigs. J. Anim. Sci. 96(Suppl. 2):160 (Abstr.) Link to abstract (.pdf)

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Effects of inclusion rate of high fiber dietary ingredients on concentration of digestible and metabolizable energy in mixed diets fed to growing pigs

Navarro, D. M. D. L., E. M. A. M. Bruininx, L. de Jong, and H. H. Stein. 2018. Effects of inclusion rate of high fiber dietary ingredients on concentration of digestible and metabolizable energy in mixed diets fed to growing pigs. J. Anim. Sci. 96(Suppl. 2):159 (Abstr.) Link to abstract (.pdf)

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Analysis for low-molecular-weight carbohydrates is needed to account for all energy-contributing nutrients in some feed ingredients, but physical characteristics do not predict in vitro digestibility of dry matter

Navarro, D. M. D. L., E. M. A. M. Bruininx, L. de Jong, and H. H. Stein. 2018. Analysis for low-molecular-weight carbohydrates is needed to account for all energy-contributing nutrients in some feed ingredients, but physical characteristics do not predict in vitro digestibility of dry matter. J. Anim. Sci. 96:532-544. Link to full text

The contribution of digestible and metabolizable energy from high fiber dietary ingredients is not affected by inclusion rate in mixed diets fed to growing pigs

Fiber in feed ingredients used in diets for pigs is mainly used for energy, which is synthesized by microbes in the hindgut of the pig and absorbed in the form of short chained fatty acids. To estimate the energy that a pig can obtain in a particular fibrous ingredient, a digestibility experiment is usually conducted and the digestible energy (DE) and the metabolizable energy (ME) in the ingredient is determined. However, it is not known if the obtained DE and ME values are accurate for all inclusion rates of the feed ingredient in diets.

There are two reasons that differing inclusion rates of high fiber ingredients in diets fed to pigs might result in variable DE and ME values. Because energy from dietary fiber is obtained via hindgut fermentation, there may be a saturation point in the fermentation capacity in the hindgut of growing pigs. In addition, increasing dietary fiber increases the passage rate of feed through the digestive tract and thus reduces time for fermentation. However, it is not known if these potential issues affect the DE and ME in fibrous ingredients fed to pigs. An experiment was conducted to determine effects of inclusion rate of four commonly used high fiber dietary ingredients on the concentration of DE and ME by growing pigs.

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Of fiber, carbohydrases, and pigs

Abelilla, J. J., D. M. D. L. Navarro, and H. H. Stein. 2017. Of fiber, carbohydrases, and pigs. Pages 9-15 In Proc. Midwest Swine Nutrition Conf., Indianapolis, IN, Sep. 7, 2017.

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Effects of physicochemical characteristics on in vitro and in vivo nutrient digestibility in pigs

Navarro, D. M. D. L., E. M. A. M. Bruininx, L. de Jong, and H. H. Stein. 2017. Effects of physicochemical characteristics on in vitro and in vivo nutrient digestibility in pigs. Page 414 in Book of Abstracts of the 68th Annual Meeting of the European Federation of Animal Science (Abstr.) Link to abstract (.pdf)

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Amino acid digestibility by weanling pigs of processed ingredients originating from soybeans, 00-rapeseeds, or a fermented mixture of plant ingredients

Navarro, D. M. D. L., Y. Liu, T. S. Bruun, and H. H. Stein. 2017. Amino acid digestibility by weanling pigs of processed ingredients originating from soybeans, 00-rapeseeds, or a fermented mixture of plant ingredients. J. Anim. Sci. 95:2658-2669. Link to full text (.pdf)

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Effects of physicochemical characteristics of feed ingredients on total tract digestibility of dry matter, energy, fiber, and protein by growing pigs

Navarro, D. M. D. L., E. M. A. M. Bruininx, L. de Jong, and H. H. Stein. 2017. Effects of physicochemical characteristics of feed ingredients on total tract digestibility of dry matter, energy, fiber, and protein by growing pigs. J. Anim. Sci. 95(Suppl. 5):90 (Abstr.) Link to abstract (.pdf)

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Chemical composition and physicochemical characteristics of feed ingredients and effects on in vitro ileal and total tract digestibility of dry matter.

Navarro, D. M. D. L., E. M. A. M. Bruininx, L. de Jong, and H. H. Stein. 2017. Chemical composition and physicochemical characteristics of feed ingredients and effects on in vitro ileal and total tract digestibility of dry matter. J. Anim. Sci. 95(Suppl. 5):89-90 (Abstr.) Link to abstract (.pdf)

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Chemical composition and physicochemical characteristics of feed ingredients and effects on in vitro ileal and total tract digestibility of dry matter

The chemical composition and structure of dietary fiber, as well as physicochemical characteristics such as bulk density, swelling, water binding capacity, and viscosity, may influence the digestion of energy and nutrients in feed ingredients. Having a complete account of the components of a feed ingredient, particularly the type and concentration of fiber, is necessary in order to accurately the energy value of an ingredient using prediction equations.

An experiment was conducted to obtain a detailed description of the composition of ten feed ingredients, and to compare the analyzed gross energy (GE) with the GE predicted by adding together the measured energy-containing components. A secondary objective was to measure the in vitro apparent total tract digestibility (IVATTD) and in vitro apparent ileal digestibility (IVAID) of dry matter (DM) and organic matter (OM) in the feed ingredients, and to determine the correlations between the physicochemical characteristics of the ingredients and the in vitro digestibility.

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