November 2012

Editor's Note

The current issue of the newsletter contains the following:

  • Two research reports: one on performance of growing pigs fed palm kernel meal, and one on the effects of particle size of corn on phosphorus and energy digestibility.

  • A podcast on carbohydrates and non-starch polysaccharides in grains and grain coproducts.

  • The latest publication from the Stein Monogastric Nutrition Laboratory.

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Hans H Stein

Research Reports

Effects of using palm kernel meal in phase 2 diets fed to weanling pigs

Palm kernel meal is a coproduct of the production of palm kernel oil. Although the amino acid profile and digestibility in palm kernel meal are less favorable than in soybean meal, it can provide significant protein in swine diets and may be used to reduce feed costs.

An experiment was conducted to test the hypothesis that palm kernel meal may replace some corn and soybean meal in phase 2 diets fed to weanling pigs without negatively affecting growth performance.

(Read more ...)

Effect on phosphorous and energy digestibility of reducing the particle size of corn fed to growing pigs

Research has shown that grinding cereal grains in diets fed to pigs into smaller particle sizes improves growth performance. Feed ground to smaller particle sizes has more surface area on which digestive enzymes can work, so digestibility of energy and nutrients that are enzymatically digested may also  improved. Generating specific data on energy and nutrient digestibility will help determine the optimal particle size for feed ingredients.

An experiment was conducted to determine the concentration of digestible and metabolizable energy and to measure the apparent (ATTD) and standardized total tract digestibility (STTD) of phosphorus by growing pigs fed diets containing corn that was ground to different particle sizes.

(Read more ...)


Carbohydrate composition and in vitro digestibility of DM and NSP in grains and grain coproducts

Neil Jaworksi, Master's student in the Stein Monogastric Nutrition Laboratory, presents some of his thesis research on carbohydrate composition of grains and grain coproducts, and how carbohydrate composition affects the energy value of these ingredients.


Kim, B. G., D. Y. Kil, Y. Zhang, and H. H. Stein. 2012. Concentrations of analyzed or reactive lysine, but not crude protein, may predict the concentration of digestible lysine in distillers dried grains with solubles fed to pigs. J. Anim. Sci. 90:3798:3808.