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Responses of finisher boars and gilts to dietary lysine and ractopamine
Conference paper   Open access

Responses of finisher boars and gilts to dietary lysine and ractopamine

C.V. Rikard-Bell, J.R. Pluske, R.J. van Barneveld, B.P. Mullan, A.C. Edwards, N.J. Gannon, D.J. Henman and F.R. Dunshea
Australasian Pig Science Association
Manipulating Pig Production XII. Proceedings of the 12th Australasian Pig Science Association (APSA) Biennial Conference (Werribee, Australia, 22/11/2009–25/11/2009)
2009
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Abstract

The minimum total lysine requirement for pigs between 80 and 120 kg has been reported as 0.65g/kg (National Research Council, 1998) whilst the current recommended lysine requirements for pigs fed a diet supplemented with ractopamine (RAC) is 0.70g/kg of total lysine (approximately 0.56g available lysine/MJ digestible energy (DE)). More recently (Rikard-Bell et al., 2009) reported that the improvements in growth performance elicited by RAC were similar for pigs offered diets with 0.56 or 0.65 g available lysine/MJ DE. The aim of this experiment was to investigate the performance responses of finisher pigs offered a wider range of dietary lysine levels and three levels of dietary RAC.

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