Impact of dried brewers’ grains supplementation on performance, metabolism and meat quality of broiler chickens

Abstract

<jats:p>The objective was to evaluate increasing levels of dried brewers’ grains (DBG) in feed for broiler chickens from 1 to 21 days old and their effect on performance, blood parameters, intestinal morphometry, carcass characteristics and meat quality. The design was completely randomized with six treatments, which consisted of various levels of DBG inclusion, namely 0 (no inclusion), 20, 40, 60, 80, and 100 g/kg with seven replications and 17 animals per experimental unit, totalling 714 male broilers. Performance parameters, blood biochemical profile, morphology of the intestinal epithelium (duodenum), and carcass yield and composition were evaluated. Feed intake was not changed by DBG inclusion levels. Nor were weight gain and feed conversion ratio. Serum cholesterol levels were not influenced, and there were no effects on triglyceride, uric acid and creatinine levels. Enzyme aspartate aminotransferase showed a quadratic effect, as did alanine aminotransferase, with higher values at 79.5 and 63.9 g/kg DBG inclusion, respectively. No changes in carcass yield and relative organ weight were observed. The composition of the carcass in ether extract showed a quadratic effect, as fat deposition rate, with lowest values at 62.8 and 62.4 g/kg of DBG inclusion levels, respectively. Crude protein levels in carcass reduced linearly, as did fat deposition rate. The parameters of intestinal morphology and meat quality were not changed. Dried brewers’ grains can be included in broiler diet from 1 to 21 days at levels up to 100 g/kg without influencing the metabolic parameters and broiler performance.&#x0D; Keywords: alternative feed, blood, by-product, intestinal villi, performance</jats:p>

Energy Values of Brewer’s Grains and Olive Pomace Waste for Broiler Chickens Determined Using the Regression Method

“…From 30 to 40% inclusion, these authors observed a linear decrease in body weight. Parpinelli et al [30] also did not observe effects of dry brewer's grains on broiler performance using inclusions at 0, 2, 4, 6, 8, and 10% for broilers until 21 days of age.…”

Effects of Partial Replacement of Soybean with Local Alternative Sources on Growth, Blood Parameters, Welfare, and Economic Indicators of Local and Commercial Broilers

“…In the literature, the results on the effects of by-products and BSF larvae on the blood profile of chickens are inconsistent and depend on the supplementation level. Parpinelli et al [59] indicated that the inclusion of up to 8% brewers' dried grain did not affect the triglyceride, uric acid, and creatinine levels; however, it increased the ALT and AST levels of broilers. An increase in the blood ALT and AST levels due to the inclusion of BSF larvae meal was also reported in [47,60].…”

Effects of Brewery Spent Grain (BSG) included poultry diet on growth performance and meat quality of New Hampshire chicken

“…The energy value of spent grain can be enhanced by reducing the moisture level (Chaudhary and Bhattarai, 2017) and can be used as non-conventional feed. Very limited research has been done in feeding brewery dried grain (BDG to chicken, although Parpinelli et al (2020) reported that there were no changes in carcass yield, relative organ weight intestinal morphology and meat quality of chicken fed BDG. In Nepalese context local brewery industry are dominant in rural to peri-urban areas, mostly uses finger millets for alcohol (Raksi or Madira) production and residues, i.e., brewery spent grain (BSG) remains unused.…”