Cellulose

Digestible and metabolizable energy in corn- or sorghum based diets may be improved by addition of a xylanase-cellulase enzyme mixture

Exogenous carbohydrases can be used in diets for pigs to increase digestibility of dietary fiber and energy in cereal grains and cereal co-products. The three main fibers in cereal grains and cereal co-products are arabinoxylans, cellulose, and mixed-linked beta glucans. The fermentability is different among these three types of fiber. Energy digestibility is often improved if xylanase is added to wheat-based diets, whereas positive responses to xylanase in corn-based diets have been difficult to demonstrate, indicating that fermentation of dietary fiber differs among ingredients. However, there is less information about effects of carbohydrases on digestibility of fiber and energy in sorghum-based diets. Therefore, an experiment was conducted to test the hypothesis that xylanase and cellulase improve the digestibility of energy and total dietary fiber in diets based on corn or sorghum with addition of high fiber co-products.

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Multi vs. single application of enzymes to degrade fibre in diets for pigs

Stein, H. H. 2019. Multi vs. single application of enzymes to degrade fibre in diets for pigs. In (eds. G. Gonzalez-Ortiz, M. R. Bedford, K. E. Back Knudsen, C. M. Courtin, and H. L. Classen): The value of fibre – engaging the second brain for animal nutrition. Wageningen Academic Publishers, Wageningen, the Netherlands.

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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

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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Effect of novel fiber ingredients on ileal and total tract digestibility of energy and nutrients in semi-purified diets fed to growing pigs

Cervantes-Pahm, S. K. Y. Liu, A. Evans, and H. H. Stein. 2014. Effect of novel fiber ingredients on ileal and total tract digestibility of energy and nutrients in semi-purified diets fed to growing pigs. J. Sci. Food Agric. 94:1284-1290. Link to full text (.pdf)

Dietary protein and cellulose effects on chemical and microbial characteristics of swine feces and stored manure

Ziemer, C. J., B. J. Kerr, S. L. Trabue, H. H. Stein, D. A. Stahl, and S. K. Davidson. 2009. Dietary protein and cellulose effects on chemical and microbial characteristics of swine feces and stored manure.  J. Env. Qual. 38:2138-2146. Link to full text (.pdf)