Effects of low protein diets on performance of pigs with a lean genotype between 40 and 115 kg liveweight

L Bunger, NR Lambe, KA McLean, G Cesaro, GA Walling, H Whitney, S Jagger, P Fullarton, CA Maltin, JD Wood

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The aim of the work was to assess the effects of three dietary protein regimes on pig performance and nitrogen (N) excretion, in particular, whether performance can be maintained in lean, fast growing pigswhenprotein levels are reduced to limitNexcretion. Entire male pigs of a lean genotype (Pietrain ·Large White·Landrace), 192 in total in four batches, were grown from 40 to 115 kg in pens with four pigs per pen. The diets were: (i) a high-protein control regime; (ii) a low-protein regime in which protein was reduced by ~2 percentage units in each growth stage, but with levels of five essential amino acids the same as in the control (LP1); (iii) an even lower protein regime in which levels of essential amino acids were not maintained beyond 60 kg (LP2). The LP2 regime was designed to promote intramuscular fat deposition rather than efficient growth. Excretion of N was reduced by 17% and 19% in LP1 and LP2, respectively, compared with the control. Average daily gain was lower and feed conversion ratio higher in LP2 than the other regimes, as expected. The control and LP1, which differed in protein but not essential amino acid levels, produced broadly similar results for performance, but pigs in LP1 had poorer feed conversion than control pigs, which could be due to slightly greater fat deposition. The results show the difficulty in maintaining consistently high levels of performance in fast-growing, lean pigs when dietary protein levels are reduced.
Original languageEnglish
Pages (from-to)461 - 466
Number of pages6
JournalAnimal Production Science
Volume55
Issue number4
DOIs
Publication statusFirst published - 2015

Fingerprint

low protein diet
swine
body weight
genotype
essential amino acids
dietary protein
feed conversion
proteins
excretion
Pietrain
intramuscular fat
developmental stages
nitrogen
lipids
diet

Bibliographical note

1025128
1023378

Keywords

  • Feeding regime
  • Growth performance
  • Lean genotype
  • Low protein
  • N pollution
  • Pigs

Cite this

Bunger, L ; Lambe, NR ; McLean, KA ; Cesaro, G ; Walling, GA ; Whitney, H ; Jagger, S ; Fullarton, P ; Maltin, CA ; Wood, JD. / Effects of low protein diets on performance of pigs with a lean genotype between 40 and 115 kg liveweight. In: Animal Production Science. 2015 ; Vol. 55, No. 4. pp. 461 - 466.
@article{2e2141eb5bff4925ba5c71acb3f46407,
title = "Effects of low protein diets on performance of pigs with a lean genotype between 40 and 115 kg liveweight",
abstract = "The aim of the work was to assess the effects of three dietary protein regimes on pig performance and nitrogen (N) excretion, in particular, whether performance can be maintained in lean, fast growing pigswhenprotein levels are reduced to limitNexcretion. Entire male pigs of a lean genotype (Pietrain ·Large White·Landrace), 192 in total in four batches, were grown from 40 to 115 kg in pens with four pigs per pen. The diets were: (i) a high-protein control regime; (ii) a low-protein regime in which protein was reduced by ~2 percentage units in each growth stage, but with levels of five essential amino acids the same as in the control (LP1); (iii) an even lower protein regime in which levels of essential amino acids were not maintained beyond 60 kg (LP2). The LP2 regime was designed to promote intramuscular fat deposition rather than efficient growth. Excretion of N was reduced by 17{\%} and 19{\%} in LP1 and LP2, respectively, compared with the control. Average daily gain was lower and feed conversion ratio higher in LP2 than the other regimes, as expected. The control and LP1, which differed in protein but not essential amino acid levels, produced broadly similar results for performance, but pigs in LP1 had poorer feed conversion than control pigs, which could be due to slightly greater fat deposition. The results show the difficulty in maintaining consistently high levels of performance in fast-growing, lean pigs when dietary protein levels are reduced.",
keywords = "Feeding regime, Growth performance, Lean genotype, Low protein, N pollution, Pigs",
author = "L Bunger and NR Lambe and KA McLean and G Cesaro and GA Walling and H Whitney and S Jagger and P Fullarton and CA Maltin and JD Wood",
note = "1025128 1023378",
year = "2015",
doi = "10.1071/AN13051",
language = "English",
volume = "55",
pages = "461 -- 466",
journal = "Animal Production Science",
issn = "1836-0939",
publisher = "CSIRO",
number = "4",

}

Bunger, L, Lambe, NR, McLean, KA, Cesaro, G, Walling, GA, Whitney, H, Jagger, S, Fullarton, P, Maltin, CA & Wood, JD 2015, 'Effects of low protein diets on performance of pigs with a lean genotype between 40 and 115 kg liveweight', Animal Production Science, vol. 55, no. 4, pp. 461 - 466. https://doi.org/10.1071/AN13051

Effects of low protein diets on performance of pigs with a lean genotype between 40 and 115 kg liveweight. / Bunger, L; Lambe, NR; McLean, KA; Cesaro, G; Walling, GA; Whitney, H; Jagger, S; Fullarton, P; Maltin, CA; Wood, JD.

In: Animal Production Science, Vol. 55, No. 4, 2015, p. 461 - 466.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of low protein diets on performance of pigs with a lean genotype between 40 and 115 kg liveweight

AU - Bunger, L

AU - Lambe, NR

AU - McLean, KA

AU - Cesaro, G

AU - Walling, GA

AU - Whitney, H

AU - Jagger, S

AU - Fullarton, P

AU - Maltin, CA

AU - Wood, JD

N1 - 1025128 1023378

PY - 2015

Y1 - 2015

N2 - The aim of the work was to assess the effects of three dietary protein regimes on pig performance and nitrogen (N) excretion, in particular, whether performance can be maintained in lean, fast growing pigswhenprotein levels are reduced to limitNexcretion. Entire male pigs of a lean genotype (Pietrain ·Large White·Landrace), 192 in total in four batches, were grown from 40 to 115 kg in pens with four pigs per pen. The diets were: (i) a high-protein control regime; (ii) a low-protein regime in which protein was reduced by ~2 percentage units in each growth stage, but with levels of five essential amino acids the same as in the control (LP1); (iii) an even lower protein regime in which levels of essential amino acids were not maintained beyond 60 kg (LP2). The LP2 regime was designed to promote intramuscular fat deposition rather than efficient growth. Excretion of N was reduced by 17% and 19% in LP1 and LP2, respectively, compared with the control. Average daily gain was lower and feed conversion ratio higher in LP2 than the other regimes, as expected. The control and LP1, which differed in protein but not essential amino acid levels, produced broadly similar results for performance, but pigs in LP1 had poorer feed conversion than control pigs, which could be due to slightly greater fat deposition. The results show the difficulty in maintaining consistently high levels of performance in fast-growing, lean pigs when dietary protein levels are reduced.

AB - The aim of the work was to assess the effects of three dietary protein regimes on pig performance and nitrogen (N) excretion, in particular, whether performance can be maintained in lean, fast growing pigswhenprotein levels are reduced to limitNexcretion. Entire male pigs of a lean genotype (Pietrain ·Large White·Landrace), 192 in total in four batches, were grown from 40 to 115 kg in pens with four pigs per pen. The diets were: (i) a high-protein control regime; (ii) a low-protein regime in which protein was reduced by ~2 percentage units in each growth stage, but with levels of five essential amino acids the same as in the control (LP1); (iii) an even lower protein regime in which levels of essential amino acids were not maintained beyond 60 kg (LP2). The LP2 regime was designed to promote intramuscular fat deposition rather than efficient growth. Excretion of N was reduced by 17% and 19% in LP1 and LP2, respectively, compared with the control. Average daily gain was lower and feed conversion ratio higher in LP2 than the other regimes, as expected. The control and LP1, which differed in protein but not essential amino acid levels, produced broadly similar results for performance, but pigs in LP1 had poorer feed conversion than control pigs, which could be due to slightly greater fat deposition. The results show the difficulty in maintaining consistently high levels of performance in fast-growing, lean pigs when dietary protein levels are reduced.

KW - Feeding regime

KW - Growth performance

KW - Lean genotype

KW - Low protein

KW - N pollution

KW - Pigs

U2 - 10.1071/AN13051

DO - 10.1071/AN13051

M3 - Article

VL - 55

SP - 461

EP - 466

JO - Animal Production Science

JF - Animal Production Science

SN - 1836-0939

IS - 4

ER -