The effects of dietary protein concentration on compensatory growth in barrows and gilts

Journal of Animal Science
D J CritserA J Lewis

Abstract

An experiment using 120 crossbred pigs (60 barrows and 60 gilts) was conducted to determine the effect of dietary protein concentration on the compensatory response in growth after a period of feed restriction. Thirty pigs were allowed ad libitum (AL) access to one of five corn-soybean meal diets (13.1 to 18.4% CP) from approximately 42 to 102 kg BW. Thirty additional pigs were restricted (R) to a maintenance amount of a 14.4% CP diet for 21 d, after which they were allotted to one of the five diets and allowed ad libitum access to feed until they reached 102 kg. Restricted pigs had lower ADFI, ADG, and ADG/ADFI (P < .05) than did AL pigs. During the postrestriction period, R pigs had higher ADFI and ADG (P < .001) and tended to be more efficient (P < .08) than AL pigs. Average backfat thickness was not different (P > .8) between AL and R pigs. Lean percentage (5% fat) was not affected (P > .5) by feeding regimen but increased linearly (P < .1) as protein level increased. Organ weights (expressed as a percentage of empty BW.75) were similar in AL and R pigs. However, kidney and stomach weights differed among protein levels (P < .01), as did liver weight (P < .06), with a linear increase (P < .02) in both kidney and liver weight...Continue Reading

Citations

Aug 29, 2014·Animal : an International Journal of Animal Bioscience·F SirtoriO Franci
Apr 10, 2020·Journal of Veterinary Pharmacology and Therapeutics·Zhoumeng LinJim E Riviere
Mar 24, 2012·Animal : an International Journal of Animal Bioscience·C ChaosapJ Wiseman
Jul 13, 2014·Environmental Science and Pollution Research International·E KerambrunR Amara
Nov 10, 2006·Journal of Animal Science·P A LovattoJ van Milgen
Nov 7, 2012·Animal Science Journal = Nihon Chikusan Gakkaihō·Aiko IshidaMasaya Katsumata
Jul 1, 2005·Meat Science·Henrik J AndersenMargrethe Therkildsen
Mar 16, 2007·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Florence Gondret, Bénédicte Lebret

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