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Growth performance and digestion of growing lambs fed diets supplemented with glycerol

Published online by Cambridge University Press:  24 July 2017

A. M. Saleem  and
A. M. Singer
A. M. Saleem*
Affiliation:
Department of Animal and Poultry Production, Faculty of Agriculture, South Valley University, Qena 83523, Egypt
A. M. Singer
Affiliation:
Animal and Poultry Production and Fish Department, Faculty of Agriculture and Natural Resources, Aswan University, Aswan, Egypt
*
†Email: a.seliem@agr.svu.edu.eg
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Abstract

Two experiments were conducted to evaluate the effects of replacing corn with an increasing concentration of high-purity glycerol (>99%) on growth performance, economical efficiency, blood constituents and nutrient digestibility of growing lambs. In experiment one, 24 male lambs (initial BW=33.6±6.0 kg; age=6.75±0.75 months) were randomly assigned to one of the three experimental treatments containing 0%, 5% or 10% glycerol to replace corn in concentrate. In experiment two, nine lambs (initial BW=44.7±2.2 kg, age=8.84±0.32 months) were used in a digestion trial with three treatments (three lambs per treatment) with glycerol replacing corn at 0%, 5% or 10% in the concentrate. Total dry matter (DM) intake decreased quadratically (P=0.003) with increasing concentration of glycerol in the diet. Lambs fed glycerol diets had greater average daily gain (P=0.005) and better feed efficiency (P=0.002) compared with the control. Feed costs were also reduced with glycerol inclusion. Glycerol supplementation did not affect serum concentrations of total protein, albumin, globulin, total lipid, cholesterol and glucose concentrations. Glycerol supplementation had no effect (P>0.05) on organic matter and CP digestion, but improved DM (P=0.0003), crude fiber (P=0.10), ether extract (P=0.0002) and nitrogen-free extract (P=0.05) digestion. In conclusion, glycerol can replace corn up to 10% of DM in the diets of growing lambs.

Keywords

glycerollambperformancedigestibilityblood metabolites
Type
Research Article
Information
animal , Volume 12 , Issue 5 , May 2018 , pp. 959 - 963
Copyright
© The Animal Consortium 2017 

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