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Prairie Swine Centre is an affiliate of the University of Saskatchewan
Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.
Financial support for the Enterprise Model Project and Pork Insight has been provided by:
Immune stimulation increases amino acid requirements in nursery pigs fed antibiotic-free starter diets- B.Jayaraman and C.M.Nyachoti 2017
Posted in: Nutrition, Pork Insight Articles, Uncategorized by admin on May 2, 2017
The Swine Nutrition Program at the University of Manitoba recently concluded a series of trials to determine the optimal SID Trp:Lys and SID Thr:Lys ratios for weaned pigs fed Antimicrobial growth promoters (AGP)-free starter diets and subjected to immunological challenge. Sanitation and Escherichia coli K88 (E. coli K88) models were used to challenge the weaned piglets.
The NRC (2012) recommends a diet with a SID Trp:Lys of 16 per cent and a SID Thr:Lys of 59 per cent, for pigs between seven and 25 kg, but this does not consider the health status of pigs. These values are derived from different studies in piglets fed diets containing AGP and so may have different values for pigs raised on a AGP-free diet.
This study concluded that weaned piglets raised under sub-optimal sanitary conditions and fed AGP-free diets need higher dietary threonine:lysine and tryptophan:lysine requirements than the NRC (2012) recommendations. Ensuring adequate amino acids in AGP-free starter diets will aid in maintaining good performance under unfavorable health conditions.