Sotak-Peper

Amino acid digestibility in soybean meal sourced from different regions of the United States and fed to pigs

Sotak-Peper, K. M., J. C. González-Vega, and H. H. Stein. 2017. Amino acid digestibility in soybean meal sourced from different regions of the United States and fed to pigs. J. Anim. Sci. 95:771-778. Link to abstract

Effects of production area and microbial phytase on the apparent and standardized total tract digestibility of phosphorus in soybean meal fed to growing pigs

Sotak-Peper, K. M., J. C. González-Vega, and H. H. Stein. 2016. Effects of production area and microbial phytase on the apparent and standardized total tract digestibility of phosphorus in soybean meal fed to growing pigs. J. Anim. Sci. 94:2397-2402. Link to full text (.pdf)

Concentrations of digestible, metabolizable, and net energy in soybean meal produced in different areas of the United States and fed to pigs

Sotak-Peper, K. M., J. C. González-Vega, and H. H. Stein. 2015. Concentrations of digestible, metabolizable, and net energy in soybean meal produced in different areas of the United States and fed to pigs. J. Anim. Sci. 93:5694-5701. Link to full text (.pdf)

Concentrations of nitrogen-corrected apparent metabolizable energy and amino acid digestibility in soybean meal from Argentina, Brazil, China, Thailand, and the United States fed to broilers

Sotak-Peper, K. M., R. C. Sulabo, C. M. Parsons, and H. H. Stein. 2015. Concentrations of nitrogen-corrected apparent metabolizable energy and amino acid digestibility in soybean meal from Argentina, Brazil, China, Thailand, and the United States fed to broilers. J. Anim. Sci. 93(Suppl. s3):299 (Abstr.) Link to abstract (.pdf)

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Determination of amino acid digestibility in soybean meal from different regions of the United States and fed to pigs

Soybeans grown in the northern United States are exposed to fewer growing days and hours of sunlight than soybeans grown elsewhere in the U.S. As a result, soybeans grown in the northern U.S. fix less nitrogen, and have a lower concentration of crude protein, than other U.S. soybeans. However, the concentrations of particular amino acids, particularly indispensable amino acids, are more important for the purposes of diet formulation than the concentration of crude protein. The concentration of amino acids in soybeans grown in different parts of the U.S. has not been determined.

The amount of amino acids in soybean meal that are available to the pig also depends on digestibility, but no research has been conducted to compare the digestibility of amino acids among soybean meal produced in different regions of the U.S. Therefore, an experiment was conducted to compare the standardized ileal digestibility (SID) of amino acids and the concentration of SID amino acids in soybean meal produced in different regions within the United States and fed to growing pigs.

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Effects of production area and microbial phytase on the apparent and standardized total tract digestibility of phosphorus by growing pigs

The area in which soybeans are grown is known to affect various aspects of the chemical composition of soybean meal produced from those soybeans. However, it is not known if there is a difference in the concentration of phytate, and therefore in phosphorus digestibility, among soybeans from different growing areas. Therefore, an experiment was conducted to determine the concentration of phytate and the apparent (ATTD) and standardized (STTD) total tract digestibility of phosphorus in soybean meal produced from soybeans grown in four different areas in the United States. A secondary objective was to determine the effect of microbial phytase on STTD of P in soybean meal from each of the four areas.

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Concentrations of nitrogen-corrected apparent metabolizable energy and amino acid digestibility in soybean meal from Argentina, Brazil, China, Thailand and the United States fed to broilers

The nutritional value of soybean meal from different sources may vary due to differences in processing techniques and environmental conditions such as growing areas, soil type, and variety of soybeans. The Philippines import soybean for livestock feed from many different countries. However, the nutritional quality of soybean meal from these different origins has not been compared. It is important for producers formulating diets in the Philippines to know whether the same values can be used in formulations for all sources of imported soybean meal. Therefore, two experiments were conducted to determine the concentrations of apparent metabolizable energy (AME) and nitrogen-corrected apparent metabolizable energy (AMEn), and the standardized ileal digestibility (SID) of amino acids by broilers fed soybean meal from Argentina, Brazil, China, Thailand, and the United States.

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Nutritional value of soybean products

Sotak, K. M. and H. H. Stein. 2014. Nutritional value of soybean products. Pages 19-25 in Proc. Midwest Swine Nutr. Conf. Indianapolis, IN, Sep. 4, 2014. Link to full text (.pdf)

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Concentrations of digestible and metabolizable and net energy in soybean meal produced throughout the United States and fed to pigs

Sotak, K. M. and H. H. Stein. 2014. Concentrations of digestible and metabolizable and net energy in soybean meal produced throughout the United States and fed to pigs. J. Anim. Sci. 92(Suppl. 2):68-69 (Abstr.) Link to abstract (.pdf)

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Concentrations of digestible, metabolizable, and net energy in soybean meal produced in different areas of the United States and fed to pigs

One factor that affects the chemical composition of soybeans and soybean meal is where the beans were grown. For instance, soybeans grown in the northern United States contain less crude protein than soybeans grown further south. As a result, soybean meal produced from beans grown in the Northern United States often contain less crude protein than soybean meal produced from beans grown further south. However, less is known about how the concentrations of digestible (DE), metabolizable (ME), and net (NE) energy differs among meals produced from soybeans grown in different areas of the U.S. Therefore, an experiment was conducted to determine the digestibility of energy and concentrations of DE, ME, and NE in soybean meal produced from soybeans grown in different areas of the U.S. and fed to growing pigs.

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Nutritional value of soy products fed to pigs

Stein, H. H., J. A. Roth, K. M. Sotak, and O. J. Rojas. 2013. Nutritional value of soy products fed to pigs. Swine Focus #004. Link to full text (.pdf)

Disappearance of butyrate in the digestive tract of weanling and growing pigs fed diets containing different sources of butyrate

Sotak, K., M. Song, H. Stein, and S. Moreland. 2013. Disappearance of butyrate in the digestive tract of weanling and growing pigs fed diets containing different sources of butyrate. J. Anim. Sci. 91(Suppl. 2):110 (Abstr.) Link to abstract (.pdf)

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