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Stein Nutrition Newsletter, August 2014
August 2014

Welcome

Welcome to the Stein Nutrition Newsletter! In this issue, you will find some of the work our lab has produced in the previous month. For more information, please visit our website at http://nutrition.ansci.illinois.edu.

Research Report: Digestible, metabolizable, and net energy in diets containing 0, 15, or 30% wheat bran fed to growing pigs

When evaluating the energy content of pig diets, producers and feed companies in the United States usually use the digestible energy (DE) and metabolizable energy (ME) systems. However, these systems do not take into account the heat produced by the animals during digestion, and thus the energy lost by pigs in the process of digesting and metabolizing the feed. Pigs fed diets high in fiber have greater feed intake, larger gastrointestinal tracts, and increased hindgut fermentation relative to pigs fed diets containing less fiber. Therefore, they might be expected to have greater heat production as well. As a result, the DE and ME systems may overestimate the energy value of fibrous feed ingredients. Net energy (NE) takes heat production into account, and thus may be a more accurate estimate of the energy available to the pig.

An experiment was conducted to test the hypothesis that increasing dietary fiber in diets fed to growing pigs will increase heat production and decrease net energy values.

(Read more ...)

Research report: Effects of chemical, physical, or enzymatic treatments on concentration of DE and ME and on digestibility of energy, organic matter, and fiber in DDGS fed to growing pigs

Distillers dried grains with solubles (DDGS), a co-product of the ethanol industry, is an affordable source of energy and protein in pig diets. DDGS contains more gross energy than corn, but the energy is less digestible because of the high concentration of insoluble fiber in DDGS. If the fiber in DDGS could be made more soluble with pretreatment, its feed value would be improved.

An experiment was conducted to determine the effects of physical, chemical, and enzymatic pretreatments on the concentrations of digestible (DE) and metabolizable (ME) energy and on the apparent total tract digestibility (ATTD) of gross energy, organic matter, acid detergent fiber (ADF), and neutral (NDF) detergent fiber.

(Read more ...)

Podcast: Digestible, metabolizable, and net energy in diets containing 0, 15, or 30% wheat bran fed to growing pigs

Neil Jaworski, a Ph. D. candidate in the Stein Monogastric Nutrition Laboratory, presents results of a study he conducted with Dr. Dewen Liu and Dr. Defa Li at the China Agricultural University. The experiment was conducted to determine the effects of adding wheat bran, a fibrous feedstuff, on digestible, metabolizable, and net energy. Adapted from a presentation at the 2014 ASDA-ASAS-CSAS Joint Annual Meeting, Kansas City, Missouri, July 20-24.

(Listen or download)

Press release: Researchers test organic vs. inorganic microminerals fed to pigs

URBANA, Ill. - Pigs require micromineral supplements in their diets to achieve optimal growth and health. However, feeding supplements that aren't well digested can cause pigs to excrete excess minerals, which may reduce profits and also increase pollution to the external environment. Research from the University of Illinois may help swine producers decide which micromineral supplements are best for their pigs.

(Read more ...)

New publications from the Stein Monogastric Nutrition Laboratory

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.

In This Issue

• Research report: Digestible, metabolizable, and net energy in diets containing 0, 15, or 30% wheat bran fed to growing pigs
• Research report: Effects of chemical, physical, or enzymatic treatments on concentration of DE and ME and on digestibility of energy, organic matter, and fiber in DDGS fed to growing pigs
• Podcast: Digestible, metabolizable, and net energy in diets containing 0, 15, or 30% wheat bran fed to growing pigs
• Press release: Researchers test organic vs. inorganic microminerals fed to pigs
• New publications from the Stein Monogastric Nutrition Laboratory

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