Pigs

Oven drying of ileal digesta from growing pigs reduces the concentration of AA compared with freeze drying and results in reduced calculated values for endogenous losses and elevated estimates for ileal digestibility of AA

Lagos L. Vanessa, and Hans H. Stein. 2019. Oven drying of ileal digesta from growing pigs reduces the concentration of AA compared with freeze drying and results in reduced calculated values for endogenous losses and elevated estimates for ileal digestibility of AA. J. Anim. Sci. 2019.97:820–828. Link to full text.

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Effects of microbial phytase on mucin synthesis, gastric protein hydrolysis, and degradation of phytate along the gastrointestinal tract of growing pigs

Mesina Von G. R., L. Vanessa Lagos, Rommel C. Sulabo, Carrie L. Walk, and Hans H. Stein. 2019. Effects of microbial phytase on mucin synthesis, gastric protein hydrolysis, and degradation of phytate along the gastrointestinal tract of growing pigs. J. Anim. Sci. 2019.97:756–767. Link to full text.

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Increasing levels of microbial phytase increases the digestibility of energy and minerals in diets fed to pigs

Arredondo Mónica A., Gloria A. Casas, Hans H. Stein. 2019. Increasing levels of microbial phytase increases the digestibility of energy and minerals in diets fed to pigs. Anim. Feed Sci. Technol. 248: 27 - 36. Link to full text.

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Effects of dietary digestible calcium on growth performance and bone ash concentration in 50- to 85-kg growing pigs fed diets with different concentrations of digestible phosphorus

Lagos L. V., C. L. Walk, M. R. Murphy, H. H. Stein. 2019. Effects of dietary digestible calcium on growth performance and bone ash concentration in 50- to 85-kg growing pigs fed diets with different concentrations of digestible phosphorus. Anim. Feed Sci. Technol. 247: 262 - 272. 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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Crystalline amino acids in diets used to determine the standardized ileal digestibility of amino acids in feed ingredients fed to pigs do not influence calculated values for amino acid digestibility

Protein and amino acids quality in feed ingredient is most correctly evaluated by determining the standardized ileal digestibility (SID) of crude protein (CP) and amino acids. Experiments to determine the SID of CP and amino acids in feed ingredients often utilize semi-synthetic diets that contain the test ingredient as the sole source of CP and amino acids. Therefore, the CP and amino acid supply from experimental diets do not always meet the requirement for standardized ileal digestible amino acids by pigs and, therefore, pig growth is often limited in these experiments.

Crystalline amino acids are believed to be rapidly absorbed and 100% digestible. Addition of crystalline amino acids to diets during the adaptation or collection phase is, therefore, believed not to influence values for SID of amino acids in the test feed ingredient, but this has not been experimentally verified. Therefore, an experiment was conducted to test the hypothesis that addition of crystalline amino acids to diets during the adaptation or collection periods of digestibility studies will not influence calculated values for SID of CP and amino acids in corn and soybean meal. 

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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


 

Nutritional value of high-lysine sorghum, red sorghum, white sorghum, and yellow dent corn fed to growing pigs

Sorghum is used as an alternative to corn due to its lower cost and wide availability. However, conventional sorghum contains high concentration of tannin and phytate, which act as antinutritional factors. Use of microbial phytase may hydrolyze phytate and subsequently improve P absorption. High-lysine sorghum is a new variety of sorghum which may be comparable to other cereal grains and may serve as alternative to corn for pigs. However, there are at this point no data for effects of adding phytase to diets containing sorghum and no data to demonstrate the nutritional value of high-lysine sorghum.

Therefore, 2 experiments were conducted to test the hypothesis that inclusion of 500 phytase units (FTU)/kg of microbial phytase improves the standardized total tract digestibility (STTD) of P in sorghum varieties. The second hypothesis was that the STTD of P, as well as concentrations of digestible energy (DE) and metabolizable energy (ME) in high-lysine sorghum is not different from that of corn and other sources of sorghum.

 

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Development and Nutritional Value of Advanced Soybean Products Used in Diets for Young Pigs

Laia Blavi and Hans H. Stein. 2018. Development and Nutritional Value of Advanced Soybean Products Used in Diets for Young Pigs. Pages 29 - 32. Midwest Swine Nutrition Conf., Indianapolis, IN, Sep. 6, 2018. Link to full text (.pdf)

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Enzymatic digestion turns food waste into feed for growing pigs

Jinno Cynthia, Yijie He, Dan Morash, Emily McNamara, Steve Zicari, Annie King, Hans H, Stein, Yanhong Liu. 2018. Enzymatic digestion turns food waste into feed for growing pigs. Anim. Feed Sci. Technol. 242:48-58. Link to full text