Abstract
Smith, J.W.II, O'Quinn, P.R., Goodband, R.D., Tokach, M.D. and Nelssen, J.L. 1999. Effects of low-protein, amino acid-fortified diets formulated on a net energy basis on growth performance and carcass characteristics of finishing pigs. J. Appl. Anim. Res., 15: 1–16. Two hundred eighty-eight crossbred gilts (PIC L326 x C22, initially 48 kg) were used to determine the effects of corn-soybean meal or low protein, amino acid-fortified diets formulated to equal net energy (NE) concentrations on growth performance and carcass characteristics of growing-finishing pigs. Diets were formulated to two NE concentrations, 2.51 and 2.58 Mcal/kg during growing and 2.58 and 2.65Mcal/kg during finishing period. Amino acids were provided from soybean meal or a combination of soybean meal and crystalline amino acids (L-lysine, DL-methionine, L-threonine, and L-tryptophan) formulated on an ideal protein basis. Pigs fed diets containing intact protein had greater (P<0.01) ADG, G:F and percentage lean than pigs provided diets containing crystalline amino acids. For the overall experiment, pigs fed high NE had greater (P<0.10) ADG, ADFI, 10th rib fat depth and percentage lean than pigs fed low NE. This study showed that pigs fed low-protein, amino acid-fortified diets had lower ADG, G:F and percentage lean compared with pigs fed intact protein, regardless of NE.
Highlights
Volume 0 Issue 10 Swine Day (1968-2014)
Two hundred eighty-eight gilts were used to determine the effects of corn-soybean meal or low-protein, amino acid-fortified diets, formulated on a net energy (NE) basis on growth perforn1ance and carcass characteristics
Carcass data revealed that pigs consuming high NE were fatter and had lower percentage lean than pigs consuming low NE
Summary
Volume 0 Issue 10 Swine Day (1968-2014) Follow this and additional works at: https://newprairiepress.org/kaesrr Part of the Other Animal Sciences Commons
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