Stein

Concentration of net energy in corn without or with microbial phytase fed to group-housed pigs

Corn is the primary grain used in pig diets and provides most energy to the diets. Because energy is the most expensive component in diet formulation, it is critical to accurately determine energy concentrations in corn. Use of exogenous phytase in pig diets has been a standard and most phytase is expected to generate extra-phosphoric effects that result in increases in minerals, amino acid, or energy digestibility. Therefore, phytase companies have provided customers with matrix values that can be used for down specs of energy and nutrients in diet formulation. It is thus important to confirm if dietary phytase releases energy and other nutrients as suggested before using them. To our knowledge, however, there is no information on how much phytase can increase net energy (NE) in corn when fed to group-housed pigs. Therefore, the objective of this experiment was to test the hypothesis that addition of microbial phytase to a corn-based diet increased the apparent total tract digestibility (ATTD) of gross energy (GE) and concentration of NE by group-housed growing pigs.

Authors: 
Publication Type: 

Nutritional value of Spanish Camelina sativa co-products for pigs

Cerisuelo, Alba, Pablo Ferrer, Ernesto Angel Gomez, Tofuko Awori Woyengo, Hans Henrik Stein, Mar Martínez, Jose Luís Cano, Olga Piquer. 2023. Nutritional value of Spanish Camelina sativa co-products for pigs. Animal Feed Science and Technology 301: 115665. doi.org/10.1016/j.anifeedsci.2023.115665. Link to full text.

Limited impacts of high doses of dietary copper on the gut bacterial metal resistome explain negligible co-selection of antibiotic resistance

Forouzandeh, Asal, Simon Bo Lassen, Julius Emil Brinck, Yan-Yan Zhou, Jiaojiao Zhu, David Solà-Oriol, Alessandra Monteiro f, Xiuli Hao, Jian-Qiang Su, Hans H. Stein, J. Francisco Pérez, Kristian K. Brandt. 2023. Limited impacts of high doses of dietary copper on the gut bacterial metal resistome explain negligible co-selection of antibiotic resistance. Science of the Total Environment 889 (2023) 164183. doi.org/10.1016/j.scitotenv.2023.164183.

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.

Both pelleting and reducing particle size of corn increase net energy and digestibility of amino acids and fat in corn-soybean meal diets fed to growing pigs

Pelleting and reducing particle size of grains often improve nutrient digestibility by pigs. Pelleting may also reduce particle size of grains, and it is not known if improvements in nutrient digestibility obtained by reducing the particle size of grain and improvements obtained by pelleting are additive or if there are interactions between particle size reduction and pelleting. Therefore, two experiments were conducted to test the hypothesis that particle size reduction and pelleting, separately or in combination, increase the apparent ileal digestibility (AID) of starch, the standardized ileal digestibility (SID) of amino acids (AA), N balance, apparent total tract digestibility (ATTD) of gross energy (GE), fiber, and fat, and net energy (NE) in corn-soybean meal diets fed to growing pigs.

Authors: 
Publication Type: 

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.

Authors: 

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.

Chemical composition of cassava-based feed ingredients from South-East Asia

Fanelli, Natalia S., Leidy J. Torres-Mendoza, Jerubella J. Abelilla, and Hans H. Stein. 2023. Chemical composition of cassava-based feed ingredients from South-East Asia. Anim Biosci Vol. 36, No. 6:908-919. doi.org/10.5713/ab.22.0360. Link to full text.

Chemical composition of copra, palm kernel, and cashew co-products from South-East Asia and almond hulls from Australia

Fanelli, Natalia S., Leidy J. Torres-Mendoza, Jerubella J. Abelilla, and Hans H. Stein. 2023. Chemical composition of copra, palm kernel, and cashew co-products from South-East Asia and almond hulls from Australia. Anim Biosci Vol. 36, No. 5:768-775. doi.org/10.5713/ab.22.0359. Link to full text.

Inclusion of spray dried plasma in diets based on different ingredient combinations increases the digestibility of energy, fiber, Ca, and P by young pigs

Bailey, Hannah M., Joy M. Campbell, Leidy J. Torres-Mendoza, Natalia S. Fanelli, and Hans H. Stein. 2023. Inclusion of spray dried plasma in diets based on different ingredient combinations increases the digestibility of energy, fiber, Ca, and P by young pigs. Translational Animal Science, 2023, 7, txad031. doi.org/10.1093/tas/txad031.

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.

Exogenous xylanase increases digestibility of energy and fiber in diets for gestating and lactating sows

Exogenous enzymes may improve the fermentability of dietary fiber in swine diets by hydrolyzing non-starch polysaccharides into oligosaccharides and sugars. In particular, the enzyme xylanase hydrolyzes the β-(1-4) glycosidic bonds between the xylose units in the backbone of arabinoxylans in cereal grains and grain coproducts, resulting in the release of a combination of xylose, arabinose, and xylo-oligosaccharides from arabinoxylans that can be fermented by pigs. Previous data indicate that xylanase increased the degradation of dietary fiber and increased energy digestibility in diets for growing pigs; however, there are limited data for the impact of xylanase on energy and fiber digestibility in gestating and lactating sows. Therefore, an experiment was conducted to test the hypothesis that exogenous xylanase added to diets for gestating and lactating sows will increase the apparent total tract digestibility (ATTD) of gross energy and total dietary fiber (TDF), and increase the concentrations of digestible energy (DE) and metabolizable energy (ME) during two reproductive cycles.

Publication Type: 

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.

Authors: 

Weanling pigs consume more feed if hybrid rye replaces corn in diets, but average daily gain and fecal scores are not impacted by hybrid rye

McGhee, Molly L., Jessica P. Acosta, and Hans H. Stein. 2023. Weanling pigs consume more feed if hybrid rye replaces corn in diets, but average daily gain and fecal scores are not impacted by hybrid rye. Translational Animal Science, 7: 1–10. doi.org/10.1093/tas/txad022. Link to full text.

Authors: 

Evaluation of soybean expellers fed to growing pigs

Cristobal, M., S. A. Lee, and H. H. Stein. 2023. Evaluation of soybean expellers fed to growing pigs. National Hog Farmer, On-line edition, March 23, 2023.

Authors: 

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.

Authors: 
Publication Type: 

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.

Authors: 
Publication Type: 

Amino acid digestibility in soybean meal and crystalline amino acid based diets fed to growing pigs

Soybean meal (SBM) is the major source of amino acids (AA) and energy in diets for swine throughout the world. However, due to the emergence of feed-grade crystalline AA, it is estimated that SBM usage by pigs has been reduced by at least 35% over the last 25 years. Reduction on concentration of SBM and increasing the use of crystalline AA in diets may impact the digestibility of crude protein (CP) and AA. Therefore, the objective of this experiment was to test the hypothesis that diets containing corn, SBM, and crystalline AA have greater AA digestibility compared with corn and SBM diets.

Authors: 
Publication Type: 

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.

Authors: 
Publication Type: 

Metabolizable energy and amino acid digestibility by growing pigs may be reduced if excessive heat is applied during drying of corn

Corn is harvested at a high moisture level, and thus must be dried to less than 15% moisture to ensure safe storage. Improvements to reduce the energy consumption of the dryers have been implemented, especially by increasing the inlet air temperature. However, overheating may have a negative impact on the stability of nutrients, especially amino acids (AA), because Maillard reactions may occur if heat and moisture are applied to feed ingredients. Consequently, Maillard reactions result in a decrease in the concentration and digestibility of AA, and it is possible that energy digestibility is also reduced. Therefore, the objective of these experiments was to test the hypothesis that both the temperature used in drying and the time that heat is applied will affect the standardized ileal digestibility (SID) of AA, and concentration of digestible energy (DE) and metabolizable energy (ME) in corn fed to growing pigs.

Authors: 
Publication Type: 

Pages