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Journal of Animal Science Abstract - Animal Nutrition

Evaluation of the nutritional value of glycerol for nursery pigs1

 

This article in JAS

  1. Vol. 89 No. 7, p. 2145-2153
     
    Received: Sept 29, 2010
    Accepted: Jan 29, 2011
    Published: December 4, 2014


    2 Corresponding author(s): Eric_vanHeugten@ncsu.edu
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doi:10.2527/jas.2010-3558
  1. M. C. Shields*,
  2. E. van Heugten 2,
  3. X. Lin*,
  4. J. Odle* and
  5. C. S. Stark
  1. Department of Animal Science, and
    Department of Poultry Science, North Carolina State University, Raleigh 27695

ABSTRACT

ABSTRACT

In Exp. 1, a total of 144 pigs (BW, 6.68 ± 0.17 kg) were weaned at 21 d, blocked by BW, and allocated to 48 pens with 3 pigs per pen. Pens were randomly assigned to 1 of 6 dietary treatments (0, 2.5, 5, 7.5, and 10% glycerol supplemented to replace up to 10% lactose in a basal starter 1 diet containing 20% total lactose, which was fed for 2 wk), and a negative control diet with 10% lactose and 0% glycerol. A common starter diet was fed for the next 2 wk. In Exp. 2, a total of 126 pigs (BW, 6.91 ± 0.18 kg) were weaned at 21 d of age, blocked by BW, and allocated to 42 pens with 3 pigs per pen. Pigs were assigned to 1 of 6 treatments in a 2 × 3 factorial arrangement in a randomized complete block design with factors being 1) glycerol inclusion in replacement of lactose in starter 1 diets (0 or 5%) fed for 2 wk, and 2) glycerol inclusion in starter 2 diets (0, 5, or 10%) fed for 3 wk. In Exp. 1, glycerol supplementation at 10% improved (P = 0.01) ADG (266 vs. 191 g/d) and G:F (871 vs. 679 g/kg) during the starter 1 period when compared with the negative control. Incremental amounts of glycerol linearly (P < 0.05) increased ADG and ADFI, but did not affect G:F during starter 1. There was no effect of feeding glycerol during the starter 1 phase on subsequent performance during the starter 2 phase or overall. Serum glycerol concentrations increased linearly (P = 0.003) with increasing dietary glycerol, and serum creatinine (P = 0.004) and bilirubin (P = 0.03) concentrations decreased with increasing glycerol. In Exp. 2, glycerol did not affect performance during starter 1, but it linearly increased (P ≤ 0.01) ADG and ADFI during starter 2 (464, 509, and 542 and 726, 822, and 832 g/d, respectively) and overall (368, 396, and 411 and 546, 601, and 609 g/d, respectively). At the end of the study, pigs were 1.0 and 1.5 kg heavier when fed 5 and 10% glycerol, respectively (linear, P < 0.01). Serum glycerol concentrations increased linearly during starter 2 (P < 0.001), but were not affected during starter 1. Glycerol supplementation increased serum urea N quadratically (P < 0.001) and decreased creatinine linearly (P < 0.05) in the starter 2 phase. Overall, data indicate that glycerol can be added to nursery pig diets at 10%, while improving growth performance.

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