Growth performance

Growth performance and carcass quality are not different between pigs fed diets containing cold-fermented low-oil DDGS and pigs fed conventional DDGS, but pelleting improves gain to feed ratio regardless of source of DDGS

Rodriguez, Diego A.,  Su A Lee, and Hans H. Stein. 2021. Growth performance and carcass quality are not different between pigs fed diets containing cold-fermented low-oil DDGS and pigs fed conventional DDGS, but pelleting improves gain to feed ratio regardless of source of DDGS. Journal of Animal Science, 2021, Vol. 99, No. 8, 1–8. doi:10.1093/jas/skab129.

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Influence of a novel consensus bacterial 6-phytase variant on mineral digestibility and bone ash in young growing pigs fed diets with different concentrations of phytate-bound phosphorus

Espinosa, Charmaine D., Maryane S. F. Oliveira, Deepak E. Velayudhan, Yueming Dersjant-Li, Hans H. Stein. 2021. Influence of a novel consensus bacterial 6-phytase variant on mineral digestibility and bone ash in young growing pigs fed diets with different concentrations of phytate-bound phosphorus. Journal of Animal Science, 2021, Vol. 99, No. 8, 1–12. doi.org/10.1093/jas/skab211.

Growth performance of weanling pigs fed diets with different inclusion levels of a cheese co-product

Whey, which is a co-product from dairy processing plants that extract fat and protein from milk to make cheese, has been used in diets fed to weanling pigs as a source of lactose. Whey powder does not contain much protein because the majority of the milk protein ends up in the cheese during processing. However, cheese co-products, which contain 40 to 50% crude protein may be used in the feeding of pigs, but there is limited information about the nutritional value of cheese co-products fed to pigs. Therefore, the objective of this research was to test the hypothesis that a cheese co-product may replace traditional protein sources in diets for weanling pigs without affecting growth performance.

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Corn protein has greater concentrations of digestible amino acids and energy than low-oil corn distillers dried grains with solubles when fed to pigs but does not affect the growth performance of weanling pigs

Acosta, Jessica P., Charmaine D. Espinosa, Neil W. Jaworski, and Hans H. Stein. 2021. Corn protein has greater concentrations of digestible amino acids and energy than low-oil corn distillers dried grains with solubles when fed to pigs but does not affect the growth performance of weanling pigs. Journal of Animal Science, 2021, Vol. 99, No. 7, 1–12. doi:10.1093/jas/skab175.

Effect of phytase on weaning piglet performance when fed diets supplemented with pharmacological levels of Zn

Pharmacological levels of Zn (i.e., 2,000 to 3,000 mg/kg) is often included in diets for weanling pigs to prevent post-weaning diarrhea. However, pharmacological levels of Zn may reduce microbial phytase efficacy by chelating the phytate molecule, which subsequently prevents access for phytase.  However, it is possible that this effect can be reduced by adding more phytase to diets. Therefore, an experiment was conducted to test the hypothesis that inclusion of increasing levels of phytase increases pig growth performance and mineral digestibility in diets with 3,000 mg/kg of Zn.

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Effect of dietary crude protein level on growth performance, blood characteristics, and indicators of intestinal health in weanling pigs

Limbach, Joseph R., Charmaine D. Espinosa, Estefania Perez-Calvo, and Hans H. Stein. 2021. Effect of dietary crude protein level on growth performance, blood characteristics, and indicators of intestinal health in weanling pigs. Journal of Animal Science, 2021, Vol. 99, No. 6, 1–14. doi:10.1093/jas/skab166. Link to full text.

Inclusion of dicopper oxide instead of copper sulfate in diets for growing–finishing pigs results in greater final body weight and bone mineralization, but reduced accumulation of copper in the liver

Blavi, Laia, David Solà, Alessandra Monteiro, J. Francisco Pérez, and Hans H. Stein. 2021. Inclusion of dicopper oxide instead of copper sulfate in diets for growing–finishing pigs results in greater final body weight and bone mineralization, but reduced accumulation of copper in the liver. Journal of Animal Science, 2021, Vol. 99, No. 6, 1–8. doi:10.1093/jas/skab127.

Effects of Dietary Valine, Isoleucine, and Tryptophan Supplementations to Diets Containing Excess Leucine from Corn Protein on Growth Performance of Growing Pigs

Kwon, W. B., J. A. Soto, and H. H. Stein. 2021. Effects of Dietary Valine, Isoleucine, and Tryptophan Supplementations to Diets Containing Excess Leucine from Corn Protein on Growth Performance of Growing Pigs. Journal of Animal Science, Volume 99, Issue Supplement_1, May 2021, Pages 61–62. doi.org/10.1093/jas/skab054.103. Link to Abstract.

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Buttiauxella Phytase Improves Growth Performance of Weanling Pigs Fed Corn, Soybean Meal, and Canola Meal Based Diets

Rundle, C. M., Y. Dersjant-Li, B. Hillen, M. S. F. Oliveira, and H. H. Stein. 2021. Buttiauxella Phytase Improves Growth Performance of Weanling Pigs Fed Corn, Soybean Meal, and Canola Meal Based Diets. Journal of Animal Science, Volume 99, Issue Supplement_1, May 2021, Pages 49–50. doi.org/10.1093/jas/skab054.084. (Abstr.) Link to Absctract.

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Effects of Reducing the Concentration of Ca and P and Increasing Microbial Phytase on Gastric Ph, Fecal Score, Growth Performance, and Bone Ash of Weanling Pigs

Lagos, L. V., M. R. Bedford, and H. H. Stein. 2021. Effects of Reducing the Concentration of Ca and P and Increasing Microbial Phytase on Gastric Ph, Fecal Score, Growth Performance, and Bone Ash of Weanling Pigs. Journal of Animal Science, Volume 99, Issue Supplement_1, May 2021, Page 44-45. doi.org/10.1093/jas/skab054.077 (Abstr.) Link to Abstract.

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Formulating diets based on digestible calcium instead of total calcium does not affect growth performance or carcass characteristics, but microbial phytase ameliorates bone resorption caused by low calcium in diets fed to pigs from 11 to 130 kg

Lagos, L. Vanessa, Su A Lee, Mike R. Bedford, and Hans H. Stein. 2021. Formulating diets based on digestible calcium instead of total calcium does not affect growth performance or carcass characteristics, but microbial phytase ameliorates bone resorption caused by low calcium in diets fed to pigs from 11 to 130 kg. Journal of Animal Science, 2021, Vol. 99, No. 3, 1–11. doi:10.1093/jas/skab057.

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Copper hydroxychloride improves gain to feed ratio in pigs, but this is not due to improved true total tract digestibility of acid hydrolyzed ether extract

Espinosa C. D., R. S. Fry, J. L. Usry, H. H. Stein. 2021. Copper hydroxychloride improves gain to feed ratio in pigs, but this is not due to improved true total tract digestibility of acid hydrolyzed ether extract. Animal Feed Science and Technology 274: 114839. doi.org/10.1016/j.anifeedsci.2021.114839  Link to full text.

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Effects of a novel E. coli phytase expressed in Pseudomonas fluorescens on growth, bone mineralization, and nutrient digestibility in pigs fed corn–soybean meal diets

Ren, Ping, Laia Blavi, Caroline González-Vega, Yanhong Liu, Deana Hancock, Mercedes Vazquez-Añón, Ferdinando N. Almeida, and Hans H. Stein. 2020. Effects of a novel E. coli phytase expressed in Pseudomonas fluorescens on growth, bone mineralization, and nutrient digestibility in pigs fed corn–soybean meal diets. Transl. Anim. Sci.

Effects of dietary crude protein level on growth performance, fecal score, gastrointestinal pH, and blood characteristics in weanling pigs fed antibiotic-free diets

Limbach, Joseph R., Estefania Pérez Calvo, Hans H. Stein. 2020. Effects of dietary crude protein level on growth performance, fecal score, gastrointestinal pH, and blood characteristics in weanling pigs fed antibiotic-free diets. Journal of Animal Science, Volume 98, Issue Supplement_3, November 2020, Page 91. (Abstr.). Link to abstract.

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Espinosa, C. D., J. P. Acosta, and H. H. Stein. 2020. Growth performance not sacrificed with corn protein. National Hog Farmer, On-line edition, October, 2020.

Espinosa, C. D., J. P. Acosta, and H. H. Stein. 2020. Growth performance not sacrificed with corn protein. National Hog Farmer, On-line edition, October, 2020. Link to full text.

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Effect of torula yeast on growth performance, diarrhea incidence, and blood characteristics in weanling pigs

Espinosa, Charmaine D., L. Vanessa Lagos, and Hans H. Stein. 2020. Effect of torula yeast on growth performance, diarrhea incidence, and blood characteristics in weanling pigs. Journal of Animal Science, 2020, Vol. 98, No. 10, 1–9. doi:10.1093/jas/skaa307. Link to full text.
 

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Effects of particle size reduction, pelleting, and extrusion on the nutritional value of ingredients and diets fed to pigs: A review

Lancheros, J. P., C. D. Espinosa, H. H. Stein. 2020. Effects of particle size reduction, pelleting, and extrusion on the nutritional value of ingredients and diets fed to pigs: A review. Animal Feed Science and Technology 268 (2020) 114603. https://doi.org/10.1016/j.anifeedsci.2020.114603.

Pigs prefer diets containing corn to diets containing hybrid rye when given the choice, but growth performance is not reduced when hybrid rye replaces corn in diets for growing pigs

In many parts of the world, including the United States, corn is the primary energy source used in diets for pigs, but there are no published data comparing the growth performance of growing pigs fed diets in which hybrid rye replaces corn. Unfamiliarity with hybrid rye also makes some producers in the United States reluctant to try feeding hybrid rye to pigs, as there is a long-standing belief that rye is less palatable than other feed ingredients. Therefore, two experiments were conducted to test the hypotheses that there is no difference in feed preference for diets containing either hybrid rye or corn as the exclusive cereal grain source, and that hybrid rye may replace a portion of corn in diets for growing pigs without adversely affecting growth. 

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Effect of formulating diets based on a ratio between STTD Ca and STTD P and the inclusion of phytase on growth performance, bone ash, plasma Ca and P, and carcass characteristics of pigs from 11 to 130 kg

Calcium requirements by pigs are expressed as total Ca because of a lack of data for the digestibility of Ca in feed ingredients, but it is believed that a ratio between standardized total tract digestible (STTD) Ca and STTD P is a more appropriate way to express requirements for Ca by pigs. Values for Ca digestibility in different Ca-containing feed ingredients were recently generated using diets without or with microbial phytase, which allowed for the formulation of diets based on STTD Ca values. A number of experiments were also conducted to determine STTD Ca to STTD P requirements to optimize growth performance and bone mineralization of pigs from 11 to 25 kg, 25 to 50 kg, 50 to 85 kg, and 100 to 130 kg. However, these experiments were performed independently and in experiments lasting only 3 to 5 weeks. Therefore, a follow-up experiment was conducted to test the hypothesis that the requirement for Ca expressed as a ratio between STTD Ca and STTD P obtained in short-term experiments may be applied to pigs fed diets without or with microbial phytase from 11 to 130 kg.

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Effect of replacing corn with bakery meal in diets for weanling pigs

Bakery meal consist of unsalable bread, breakfast cereals, cookies, pasta, and other foods that are no longer intended for human consumption. Bakery meal converts losses from the food industry into ingredients for the animal feed industry, thereby preventing food losses in the food chain. Wheat flour is the main ingredient in most bakery products, and this results in bakery meal containing high concentration of starch. Therefore, bakery meal is a potential sustainable feed ingredient that can be used in animal diets without competing with the food industry. However, research demonstrating the effect of bakery meal on growth performance for weanling pigs is limited. Therefore, an experiment was conducted to test the hypothesis that replacing corn with bakery meal will not influence growth performance of pigs.

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