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Performance of weanling pigs offered low or high lactose diets supplemented with avilamycin or inulin

Published online by Cambridge University Press:  09 March 2007

K. M. Pierce
Affiliation:
University College Dublin, Lyons Research Farm, Newcastle, Co. Dublin, Ireland
J. J. Callan
Affiliation:
University College Dublin, Lyons Research Farm, Newcastle, Co. Dublin, Ireland
P. McCarthy
Affiliation:
Volac Feed Ltd, Volac House, Church Street, Killeshandra, Co. Cavan, Ireland
J. V. O'Doherty*
Affiliation:
University College Dublin, Lyons Research Farm, Newcastle, Co. Dublin, Ireland
*
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Abstract

One hundred and eighty piglets (24 days old, 6·0 kg live weight) were used to investigate interactions between lactose, avilamycin and inulin on growth performance and nutrient digestibility in weaned piglets. The piglets were blocked on the basis of live weight and within each block assigned to one of six dietary treatments (six replicates (pens) per treatment). The piglets were offered diets containing either a low (175 g/kg) or high (295 g/kg) lactose levels with one of the following food additives (1) 0 supplementation (2) avilamycin (60 mg/kg) or (3) inulin (15 g/kg) in a 2 × 3 factorial arrangement. The starter diets were offered for 21 days and all diets contained chromium III oxide at 150 p. p. m. There was an interaction (P < 0·05) between lactose level and both avilamycin and inulin on average daily gain (ADG) during the starter period (days 0 to 21). The pigs receiving 295 g/kg lactose level had a higher overall ADG than pigs receiving 175 g/kg lactose level. However, there was no difference between 295 g/kg lactose and 175 g/kg lactose in ADG when the diets were supplemented with avilamycin or inulin. There was an interaction between lactose level and inulin in the apparent digestibility of gross energy (GE) and nitrogen (N) (P < 0·05). The inclusion of inulin with 175 g/kg lactose increased GE digestibility compared with the 175 g/kg lactose only diet. However, the inclusion of inulin with 295 g/kg lactose had no effect on GE digestibility. The inclusion of inulin with 295 g/kg lactose reduced N digestibility compared with the inclusion of inulin at 175 g/kg lactose. However, there was no difference in N digestibility between 175 and 295 g/kg lactose only diets. In conclusion, there was no benefit in terms of pig growth rate to supplementing diets high in lactose with either inulin or avilamycin. However, the inclusion of inulin improved the energy digestibility of diets low in lactose.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 2005

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