Performance and carcass characteristics of dairy steers fed diets containing crude glycerin

Abstract

-The objective of the study was to assess the effects of including 0, 79.8, 159.8, and 240.0 g kg -1 crude glycerin in the total diet dry matter on the 84 days feedlot performance, nutrient digestibility, blood parameters, and carcass characteristics of crossbred dairy steers. Experimental diets were composed of 98.5 g kg -1 of sorghum silage and 901.5 g kg -1of concentrate. Twenty-four crossbred dairy steers (337.3±39.8 kg body weight and 15 months of age) were distributed in a completely randomized design with four treatments and six replicates. The intake and digestibility of the dry matter and nutrients were not altered by including crude glycerin in the diet. Crude glycerol levels did not affect the final weight (430.2 kg), daily weight gain (1.38 kg day -1 ), total weight gain (97.2 kg), hot carcass weight (218.9 kg), cold carcass weight (215.2 kg), hot carcass yield (0.50 kg 100 kg -1 BW), longissimus dorsi area (62.86 cm²), subcutaneous fat thickness (4.05 mm), and carcass physical composition. Concentrations of serum glucose, triglycerides, total cholesterol, high-density lipoprotein cholesterol, and creatinine were not altered by including crude glycerin in the diet. Crude glycerin can be added to high concentrate diet up to 240 g kg -1 without changing the animal performance, apparent digestibility of nutrients, the main carcass characteristics, and blood parameters of finishing crossbred dairy steers.

Crude glycerin in corn grain-based diets for dairy calves

“…Similarly to our results, no effects on carcass characteristics were reported when crude glycerin was included at up to 100 g kg −1 DM in diets of finishing bulls (Bartoň et al, 2013;Lage et al, 2014). Maciel et al (2016b) also observed a lack of effects in HCW, CCW, HCY, CCY, SFT, LDA, and carcass physical composition when crude glycerin was included at up to 240 g kg −1 DM basis in diets of dairy steers finished in feedlot. Moreover, improved HCW and LDA were observed when bulls (Françozo et al, 2013) and beef calves (Gunn et al, 2011) fed diets containing 120 and 150 g kg −1 DM crude glycerin, respectively, suggesting that the inclusion of this ingredient can increase muscle growth in feedlot finishing cattle by the increase in energy efficiency.…”

“…Crude glycerin has been evaluated in cattle diets, and the results have indicated that there is an improvement in the average daily gain (ADG) and feed conversion (Moreira et al, 2016;Barros et al, 2018). Furthermore, the results of crude glycerin use seem to depend on diet composition (Hales et al, 2013), level of inclusion of this byproduct (Benedeti et al, 2016), and animal category (Maciel et al, 2016a;Maciel et al, 2016b).…”

Crude glycerol in the diets of the juveniles ofAmazon catfish(female Pseudoplatystoma punctifer x male Leiarius marmoratus)

“…In ruminant animals, Maciel et al (2016) analyzed the performance and carcass characteristics of dairy cows that were fed diets containing crude glycerin and observed that it did not alter serum glucose concentrations, triacylglycerol, total cholesterol, high density lipoprotein cholesterol and creatinine. Ribeiro (2015) when studying crude glycerin (0, 70, 140, and 210g kg -1 ) in the diet of confined lamb, observed no significant difference for albumin, globulin, triglycerides, alanine aminotransferase (ALT), aspartate aminotransferase (AST) and gamma glutamyltransferase.…”

Comportamiento productivo y perfil metabólico de becerros suplementados con glicerina cruda

“…Adicionalmente, Maciel et al (2016) registraron concentraciones mayores de glucosa a las obtenidas en este estudio cuando incluyeron glicerol en la dieta. Sin embargo, en estudios previos se ha incluido la glicerina cruda en la ración como un suplemento alimenticio y, por lo tanto, el balance energético es diferente y repercute en el incremento de la glucosa sérica.…”