Journal article
Standardized ileal digestible lysine requirements of male pigs immunized against gonadotrophin releasing factor
KL Moore, BP Mullan, JC Kim, FR Dunshea
Journal of Animal Science | Published : 2016
Abstract
An experiment was conducted to determine the standardized ileal digestible (SID) Lys requirement of entire male and male pigs immunized against gonadotrophin releasing factor (GnRF; immunocastrates). A total of 420 entire male and immunocastrated (IC) male pigs weighing 60.1 kg BW (SEM 0.49) were used in a 2 × 5 factorial experiment with the main effects being gender (entire males or IC males) and 5 concentrations of SID Lys:DE ratio (0.32, 0.43, 0.54, 0.64, or 0.75 g SID Lys/MJ DE). The diets were fed for 6 wk until slaughter at 107.5 kg BW (SEM 5.72). Over the entire period, IC males had a greater ADG (P < 0.001), greater ADFI (P < 0.001), and lower G:F (P < 0.001) compared with entire mal..
View full abstractGrants
Funding Acknowledgements
The authors are appreciative of the funding provided by the Australian Cooperative Research Centre for an Internationally Competitive Pork Industry. This research has been facilitated by access to Australian Proteome Analysis Facility, which is funded by an initiative of the Australian Government as part of the National Collaborative Research Infrastructure Strategy.