Effect of Protein Deprivation on Subsequent Efficiency of Dietary Protein Utilization in Finishing Pigs

  • Whang, K.Y. (Department of Animal Sciences, University of Illinois at Urbana-Champaign) ;
  • Donovan, S.M. (Division of Nutritional Sciences, University of Illinois at Urbana-Champaign) ;
  • Easter, R.A. (Department of Animal Sciences, University of Illinois at Urbana-Champaign)
  • Received : 1999.05.06
  • Accepted : 1999.08.11
  • Published : 2000.05.01


A nitrogen (N) balance trial was conducted to examine the effect of N deprivation on subsequent N retention, blood urea nitrogen (BUN) and IGF-I levels and the ratio of IGF binding protein (IGFBP)-3 to IGFBP-l and -2. Pigs in treatment (T) 1 were given diet A (2.39% N) and those in T2 and T3 were given diet B (1.31% N) and excreta were collected (period 1 (P1)). Pigs in T1 continued to receive diet A while diets for T2 and T3 were changed to diets A and C (2.74% N), respectively. The excreta were collected for two more periods (P2 and P3). During P1, pigs in T2 and T3 retained 50% less N (p<0.001) than those in T1. However, pigs provided T2 (p<0.01) and T3 (p<0.05) retained more N than those assigned to T1 during P2. Pigs in T3 tended to retain more (p=0.10) N than those receiving T2 for the same period. The BUN values were lower (p<0.05) for pigs assigned to T2 and T3 than T1 during P1 and P2. Both IGF-I and IGFBP ratios of pigs assigned to T1 were higher (p<0.05) than those given T2 and T3 during P1 but no differences were found during P2 and P3.

Cited by

  1. The effects of ovariectomy on meat performance and expression of GH/IGF-I in young goats vol.94, pp.4, 2014,
  2. Dynamics of body protein deposition and changes in body composition after sudden changes in amino acid intake: II. Entire male pigs1 vol.86, pp.9, 2008,
  3. Effect of the degree and duration of early dietary amino acid restrictions on subsequent and overall pig performance and physical and sensory characteristics of pork1 vol.87, pp.11, 2009,
  4. The effect of the dietary protein restriction and re-feeding on the content of leptin, IGF-I and urea nitrogen in the blood plasma and growth performance in pigs vol.58, pp.6, 2018,
  5. Effects of the plane of nutrition for grower pigs on their grow-finish performance and meat quality in winter vol.61, pp.1, 2019,