Pigs

Effects of corn hardness and drying temperature on digestibility of energy and nutrients in diets fed to growing pigs

Espinosa, Charmaine D., Joaquin Cabañas-Ojeda, Edgar O. Oviedo-Rondón, and Hans H. Stein. 2023. Effects of corn hardness and drying temperature on digestibility of energy and nutrients in diets fed to growing pigs. Journal of Animal Science, 101: 1–9. doi.org/10.1093/jas/skad124. Link to full text.

Nutritional value of a new source of cheese coproduct fed to weanling pigs

Mallea, Andrea P., Maryane S. F. Oliveira, Diego A. Lopez, and Hans H. Stein. 2023. Nutritional value of a new source of cheese coproduct fed to weanling pigs. Journal of Animal Science: 101, 1–10. doi.org/10.1093/jas/skad107. Link to full text.

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Torula yeast may improve intestinal health and immune function of weanling pigs

Espinosa, Charmaine D., Leidy J. Torres-Mendoza, and Hans H. Stein. 2023. Torula yeast may improve intestinal health and immune function of weanling pigs. Journal of Animal Science: 101, 1–11. doi.org/10.1093/jas/skad087. Link to full text.

No carryover effect of feeding spray dried plasma to weanling pigs in phase 1 on energy and nutrient digestibility in phase 2 were observed

Bailey, Hannah M., Joy M. Campbell, Natalia S. Fanelli, and Hans H. Stein. 2023. No carryover effect of feeding spray dried plasma to weanling pigs in phase 1 on energy and nutrient digestibility in phase 2 were observed. Journal of Animal Science, 2023, 101, 1–8. doi.org/10.1093/jas/skad065. Link to full text.

Variability in wheat middlings; are there differences in digestibility, composition among sources?

Espinosa, C. D., and H. H. Stein. 2023. Variability in wheat middlings; are there differences in digestibility, composition among sources?  National Hog Farmer, March/April 2023. Link to full text.

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Effects of different corn sources and drying temperature on digestibility of energy and total dietary fiber in diets fed to growing pigs

Drying temperatures and corn varieties that inherently differ in kernel hardness, virtuousness, and protein solubility index may influence nutrient digestibility in corn. However, information about interactive effects of corn source (i.e., endosperm hardness) and drying method on energy and nutrient digestibility is limited. Therefore, an experiment was conducted to test the hypothesis that that the apparent total tract digestibility (ATTD) of gross energy (GE) and total dietary fiber (TDF) is influenced by corn source and drying temperature.

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Effects of different protein sources in low-phosphorus diets on the basal endogenous loss of phosphorus by growing pigs

Phosphorus is one of the most expensive nutrients in swine diets. Use of standardized total tract digestibility (STTD) of P, instead of apparent total tract digestibility (ATTD), may reduce the cost of diets because STTD values, unlike ATTD values, are additive in mixed diets. Values for STTD of P can be determined by correcting ATTD of P for the basal endogenous loss of P. The basal endogenous loss of P is estimated by using a P-free diet. Gelatin has been widely used in P-free diets because it does not contain any P and is a good source of protein. However, gelatin products can make diets dusty and sticky which can reduce the palatability of these diets and make them hard to work with. In addition, feeding pigs with diets containing no P may cause health issues in pigs. Blood plasma, casein, and potato protein concentrate are possible protein alternatives to gelatin because the P in blood plasma and casein is close to 100% digestible and potato protein concentrate provides very little P. Therefore, the objective of this experiment was to test the hypothesis that the basal endogenous loss of P from pigs fed a diet containing blood plasma, casein, or potato protein concentrate are not different from that of pigs fed a diet containing gelatin.

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Effects of different corn sources and drying temperature on ileal digestibility of starch and amino acids in diets fed to growing pigs

Drying temperatures and corn varieties that inherently differ in kernel hardness, virtuousness, and protein solubility index may influence nutrient digestibility in corn. However, information about interactive effects of corn source (i.e., endosperm hardness) and drying method on nutrient digestibility is limited. Therefore, an experiment was conducted to test the hypothesis that the ileal digestibility of starch, crude protein (CP), and amino acids (AA) is influenced by corn source and drying temperature.

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Digestibility of phosphorus in high protein corn co-products fed to growing pigs

New sources of high protein corn co-products have been recently developed and may be included in diets fed to pigs. Phytase is often employed during fermentation in the bioethanol process to improve the efficiency of fermentation. However, the use of phytase during fermentation may impact the nature of phosphorus (P) in any post fermentation products, which could subsequently alter the levels of phytate-bound and non-phytate P. As a consequence, this may influence digestibility and concentration of digestible P in any feed product derived from fermentation. Therefore, an experiment was conducted to determine the standardized total tract digestibility (STTD) of P in high protein corn fermented products and in the residual distillers dried grains and solubles (DDGS) produced from a fermentation with or without the use of phytase. It is also the objective of this experiment to test the hypothesis that inclusion of phytase during the fermentation process increases P digestibility in corn co-products.

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Microbial phytase impact on digestibility energy in growing pigs.

Lee, S. A., D. A. Rodriguez, and H. H. Stein. 2022 Microbial phytase impact on digestibility energy in growing pigs.  National Hog Farmer, On-line edition, Dec. 30, 2022.

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Growth performance of weanling pigs fed diets containing spray-dried bovine plasma or hydrolyzed spray-dried bovine plasma

Espinosa, C. D., J. M. Campbell, H. H. Stein. 2022. Growth performance of weanling pigs fed diets containing spray-dried bovine plasma or hydrolyzed spray-dried bovine plasma. Animal Feed Science and Technology 294 (2022) 115500. Link to full text.
 

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Digestibility of energy in ten sources of wheat middlings fed to growing pigs

Data have been published for the composition of wheat middlings from flour mills in the U.S. and data for digestible energy (DE) and metabolizable energy (ME) have been reported as well. However, it is not known if the data obtained in wheat middlings from the U.S. also are representative for wheat middlings in Europe. Therefore, an experiment was conducted to test the null hypothesis that there are no differences in composition, apparent total tract digestibility (ATTD) of gross energy (GE), and concentration of DE and ME between wheat middlings sourced from flour mills in Europe and in the U.S.

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Effect of increasing microbial phytase levels on digestibility of phosphorus in field peas fed to young pigs

The majority of P in most plant feed ingredients is bound to phytate. Pigs, however, do not synthesize adequate endogenous phytate to release the P bound to phytate, which results in low digestibility of P in field peas. Values for ATTD and STTD of P in field peas without and with phytase have been reported, but there are no comparative values for the ATTD and STTD of P in field peas adding different levels of phytase. The objective of this experiment is to determine the effect of increasing levels of phytase on the apparent total tract digestibility (ATTD) and standardized total tract digestibility (STTD) of P in field peas fed to growing pigs.

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Standardized ileal digestibility of amino acids is not affected by reducing particle sizes or different origins of field peas fed to growing pigs

Field peas (Pisum sativum L.) have been cultivated for centuries for human consumption, due to the high nutritional quality of pea protein. However, during the last years, increasing demand for field peas for livestock feeding has developed a market in Canada, Europe, and the U.S. Therefore, as is the case with some feed ingredients, differences in soil, varieties, agronomic practices, and growing method may change the nutritional characteristics of the peas as well as the digestibility of nutrients. Besides that, differences in the particle size of field peas may change the digestibility of nutrients. Therefore, the objective of this experiment was to test the hypothesis that the standardized ileal digestibility (SID) of crude protein (CP) and amino acids (AA) in field peas is affected by the particle size of the field peas and the region where the field peas were grown.

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Apparent digestibility of energy and nutrients and efficiency of microbial phytase is influenced by body weight of pigs

Lagos, L. Vanessa, Mike R. Bedford, and Hans H. Stein. 2022. Apparent digestibility of energy and nutrients and efficiency of microbial phytase is influenced by body weight of pigs. Journal of Animal Science, 2022, 100, 1–13. doi.org/10.1093/jas/skac269. Link to full text.

Digestibility of amino acids in ten sources of wheat middlings fed to growing pigs

Data for the composition of wheat middlings from flour mills in the U.S. and for the standardized ileal digestibility (SID) of crude protein (CP) and amino acids (AA) have been published for wheat middlings from the U.S. However, it is not known if the data obtained from wheat middlings from the U.S. also are representative for wheat middlings in Europe. Therefore, an experiment was conducted to test the hypothesis that there are no differences in composition and SID of CP and AA between wheat middlings sourced from flour mills in Europe and in the U.S.

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Digestibility of energy and concentrations of digestible and metabolizable energy in high protein corn fermented products fed to growing pigs

New sources of high protein corn co-products have been recently developed and may be included in diets fed to pigs. High protein corn fermented products have been evaluated in several economically important livestock species, but additional information is required with respect to the use of these products in pigs. Therefore, an experiment was conducted to evaluate the digestible energy (DE) and metabolizable energy (ME) of high protein corn fermented products and in Post MSC DDGS.

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Water source placement does not impact energy, nutrient utilization

Lee, S. A., D. A. Rodriguez, and H. H. Stein. 2022. Water source placement does not impact energy, nutrient utilization. National Hog Farmer, On-line edition, Oct. 12, 2022.

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Vitamin D and vitamin D metabolites impact on calcium and phosphorus balance in gestating sows

Lee, S. A, and H. H. Stein. 2022. Vitamin D and vitamin D metabolites impact on calcium and phosphorus balance in gestating sows. Proc. 21th Annual Midwest Swine Nutrition Conf. Danville, IN, Sep. 8, 2022. Pages 39-43. Link to full text.

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Digestibility of amino acids in high protein corn fermented products fed to growing pigs

New sources of high protein corn co-products have been recently developed and may be included in diets fed to pigs. High protein corn fermented products have been evaluated in several economically important livestock species, but additional information is required with respect to the use of these products in pigs. Therefore, an experiment was conducted to test the hypothesis that the standardized ileal digestibility (SID) of crude protein (CP) and amino acids (AA) in high protein corn fermented products and in the residual distillers dried grains and solubles (DDGS) is greater than in soybean meal (SBM).

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