Effects of purified glycerin in balanced diets of chicken broilers treated from 22 to 42 days of age1

Abstract

The aim of this study was to investigate the effects of including purified glycerin in the diets of broilers from 22 to 42 days of age. Eighty Cobb 500® lineage broilers were distributed in a completely randomized design (CRD) to one of four treatment groups (0, 2, 4 and 6% of purified glycerin inclusion in feed) and five replicates of four birds. The birds were evaluated for performance (weight gain, feed intake and feed conversion); carcass yield; special cuts yield (thigh, drumstick and breast); muscle colour (L* = lightness, a* = redness, b* = yellowness); and crude protein, ether extract and moisture content of the breast muscle. Inclusion of purified glycerin in the diet did not affect (p > 0.05) any of the growth performance indicators, which demonstrated the technical feasibility of including up to 6% glycerin in the diet. Similarly, there was no effect on carcass yield; special-cut yields; muscle colour (L* = lightness, a* = redness, b* = yellowness); or crude protein, ether extract and moisture content of breast muscle. The inclusion of purified glycerin at up to 6% in the diet proved to be feasible in broilers treated from 22 to 42 days of age.

Carcass Characteristics and Meat Quality of Betong Chicken Fed with Diets Supplemented with Crude Glycerin

“…No significant differences in the other chemical composition were observed among different experimental groups in the present study. The study by Silva et al (2017) also confirmed that CG in diet did not affect EE, CP, ash and moisture content of the breast meat. Conversely, there are other studies which showed a higher EE content in breast meat ( Legawa et al , 2018 ) and lower EE in thigh meat ( Topal and Ozdogan, 2013 ) of broiler chicken, fed with CG.…”

“…Thus, the use of CG for livestock feed is probably the cheapest alternative. Several studies have confirmed that CG could substitute corn by 5 to 10% in the chicken feed without compromising growth performance and carcass yield in broiler chicken ( Cerrate et al , 2006 ; Sehu et al , 2012 ; Topal and Ozdogan, 2013 ; Urgnani et al , 2014 ; Freitas et al , 2017 ; Da Silva et al , 2017 ; Garcia et al , 2018 ; Legawa et al , 2018 ) and meat quail ( Arif et al , 2017 ; Farrapo et al , 2017 ). Although utilization of CG in broiler nutrition is widely reported, limited information is available regarding the effect of CG on meat quality, particularly in indigenous chicken breeds.…”

Utilización de glicerina USP durante una restricción energética temprana en pollos de engorde

“…En ese sentido, en los estudios iníciales con pollos de engorde se utilizó glicerol de alta pureza y se observó una respuesta productiva óptima (Simon et al 1996, pp. 108-10), posteriormente, se han usado glicerinas con diferente nivel de pureza y se ha observado un efecto positivo tanto al comienzo (Abd-Elsameeet al 2010, p. 291;McLea et al 2011, p. 372;Silva et al 2012, p. 199) como al final del periodo de engorde (Avellaneda et al 2009, p. 3;da Silva et al 2017da Silva et al , p. 2087.…”