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Stein Nutrition Newsletter, October 2018
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            October 2018

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.

In This Issue

• Podcast: Effects of various heat treatments on concentrations of DE and Me and on AA digestibility in SBM fed to growing pigs.
• Research Report: Basal endogenous loss, standardized total tract digestibility, and retention of calcium in gestating sows changes during gestation, but microbial phytase reduces basal endogenous loss of calcium by gestating sows.


 

 

Podcast: Effects of various heat treatments on concentrations of DE and ME and on AA digestibility in SBM fed to growing pigs.

Dr. John K. Mathai, a recent graduate from the Stein Monogastric Nutrition Lab, discusses the effects of varied amounts of heat and processing time on the DE, ME, and digestibility of amino acids in corn-soybean meal diets. Adapted from a presentation at the 2018 ASAS Midwestern Section meeting, Omaha, NE, March 12-14. 
(Watch or download)

 

 

Research Report: Basal endogenous loss, standardized total tract digestibility, and retention of calcium in gestating sows changes during gestation, but microbial phytase reduces basal endogenous loss of calcium by gestating sows.

Standardized total tract digestibility (STTD) of Ca has been determined for most Ca containing ingredients fed to growing pigs, but the basal endogenous loss of Ca is greater and the STTD of Ca in sows in mid-gestation are less than in growing pigs. As a consequence, if diets for gestating sows are formulated using STTD values determined in growing pigs, the provisions of digestible Ca may be less than anticipated.

The efficacy of phytase to release Ca and P is believed to be influenced by the physiological state of pigs with phytase fed to sows in mid-gestation releasing less Ca and P compared with growing pigs or sows in late-gestation. However, it is not known if values for STTD of Ca or retention of Ca and P that are measured in one period of gestation are representative of the entire gestation period.

Therefore, an experiment was conducted to test the hypothesis that the STTD of Ca from calcium carbonate and the response to microbial phytase on STTD of Ca and apparent total tract digestibility (ATTD) of P in corn-based diets fed to gestating sows are constant throughout the gestating period for sows. The second objective was to test the hypothesis that retention of Ca and P does not change during gestation.

(Read more...)

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