Hans H. Stein

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

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Energy digestibility, Dry matter digestibility, Dietary fiber, Physicochemical characteristics, Corn, Wheat, Soybean meal, Canola meal, Distillers dried grains with solubles, Corn germ meal, Copra expellers, Sugar beet pulp, Cellulose, Pectin

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Energy digestibility, Digestible energy, Metabolizable energy, Dietary fiber, Inclusion rate

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

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Corn germ meal, Sugar beet pulp, Wheat middlings, Inclusion rate, Dry matter digestibility, Crude protein digestibility

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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Corn germ meal, Sugar beet pulp, Wheat middlings, Inclusion rate, Digestible energy, Metabolizable energy

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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Energy, In vitro digestibility, Physicochemical characteristics, Total dietary fiber

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

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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.

Keywords:

Dietary fiber, Digestible energy, Metabolizable energy, Corn germ meal, Sugar beet pulp, Wheat middlings, Canola meal

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Research Reports

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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)

Keywords:

In vitro digestibility, Energy digestibility, Fiber digestibility, Corn, Wheat, Soybean meal, Canola meal, Distillers dried grains with solubles, Corn germ meal, Copra expeller, Sugar beet pulp, Cellulose, Pectin

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Dietary fiber, Energy digestibility, Fiber digestibility, Physicochemical characteristics

Publication Type:

Conference proceedings

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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In vitro digestibility, Physicochemical characteristics, Dietary fiber

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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In vitro, Dry matter digestibility, Organic matter digestibility, Dietary fiber

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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