Relation between in vitro N digestibility and in vivo standardized ileal amino acid digestibility in cereals for pigs.
- Publikations-Art
- Kongressbeitrag
- Autoren
- Eklund M, Sauer N, Hörner S, Rodehutscord M, Schenkel H, Spindler HK, Rosenfelder P, Strang E and Mosenthin R.
- Erscheinungsjahr
- 2013
- Veröffentlicht in
- 12. Tagung Schweine- und Geflügelernährung
- Serie/Bezeichnung
- Tagungsband
- ISBN / ISSN / eISSN
- 978-3-86829-575-7
- Seite (von - bis)
- 70-72
- Tagungsname
- 12. Tagung Schweine- und Geflügelernährung
- Tagungsort
- Halle-Wittenberg
- Tagungsdatum
- 12.-14. November 2013
- Schlagworte
- cereals, digestibility, ileal amino acid, in vitro digestibility, Schwein, Verdaulichkeit
Due to their high starch content, cereals are primarily used as energy sources in diets for pigs (Black, 2001 ). However, as cereals comprise up to 80% or more in diet formulations for pigs, they can supply up to 70% of indispensable amino acid (AA) requirement to the pig (Sauer et al., 1981). Analyses of the chemical composition of different cereals reveal considerable differences in contents of nutrients and antinutritional factors, mainly due to variations in genetic and environmental factors (e.g. Evonik Degussa, 2010). Coefficients of standardized ileal digestibility (SID) of AA in different cereals have been published in several feed tables (e.g. NRC, 2012), but there is scarce information on SID values for new cereal genotypes. However, in vivo ileal digestibility studies are time-consuming, labor-intensive and expensive and require the use of surgically modified pigs for collection of ileal digesta (Zimmermann and Mosenthin, 2002). Thus, the feed industry would most likely benefit from an evaluation system that could provide a rapid and accurate measure of SID of AA in different cereal genotypes used for feed manufacturing. As an alternative to in vivo digestibility assays, Boisen and Fernandez (1995) introduced a two-step incubation method for prediction of ileal AA digestibiIity based on pepsin and pancreatin digestion. However, validation studies confirming the suitability of this method for in vitro prediction of SID of AA in feed ingredients for growing pigs are still lacking. The aim of this study was to measure in vitro nitrogen (N) digestibility in different cereal genotypes and to compare these values with SID of AA obtained previously under in vivo conditions with growing pigs.