Blend-feeding or feeding a single diet to pigs has no impact on growth performance or carcass quality

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Contents Vol 53(1)

doi:10.1071/AN12053

Food, Fibre and Pharmaceuticals from Animals

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Blend-feeding or feeding a single diet to pigs has no impact on growth performance or carcass quality

K. L. Moore ^A ^B, B. P. Mullan ^A and J. C. Kim ^A

^A Livestock Industries Innovation, Department of Agriculture and Food Western Australia, South Perth, WA 6151, Australia.
^B Corresponding author. Email: karen.moore@agric.wa.gov.au

Animal Production Science 53(1) 52-56 http://dx.doi.org/10.1071/AN12053
Submitted: 14 February 2012 Accepted: 16 August 2012 Published: 16 October 2012





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Abstract

A completely randomised block experiment was conducted using 216 female pigs (Large White × Landrace, six pigs/pen and 12 replicate pens/treatment), at an average liveweight (LW) of 22.6 kg ± 0.56 (mean ± s.e.m.), to examine the effect of feeding strategies on performance during the grower–finisher phase. Pigs were blocked and randomly allocated to the following treatments on the basis of initial LW: (1) phase-feeding: diets changed when the average LW of pigs in the pen reached 20, 50 or 80 kg; (2) blend: diets changed weekly to meet the requirements of the average LW of pigs in the pen and; (3) single: the same diet fed throughout (formulated to meet the requirements of the pig at 60 kg LW). The experimental diets were fed from 22 to 102 kg LW. Between 68 and 98 days of age, pigs fed the single diet grew more slowly (P < 0.001) due to poorer feed conversion (P < 0.001) than did pigs fed the phase-feeding or blend diets. However, between 99 and 133 days of age, pigs fed the single diet utilised feed more efficiently (P < 0.001) than did pigs fed the phase-feeding and blend diets. Therefore, there was no significant effect of the feeding strategies on overall growth performance (P > 0.05) and there was no significant difference in carcass quality (P > 0.05) among treatment groups. However, it was 3.74% and 3.51% cheaper to use the blend- and single-diet feeding strategies, respectively, than it was to use a phase-feeding program (P = 0.002). The present experiment has shown that blend-feeding could be a strategy to reduce the cost of production. Feeding a single diet appears to have merit and may have appeal for certain circumstances; however, it would need to be investigated further before being implemented commercially.

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