Apparent Metabolizable Energy of Glycerin for Broiler Chickens

Abstract

Three energy balance experiments were conducted to determine AMEn of glycerin using broiler chickens of diverse ages. In experiment 1, two dietary treatments were fed from 4 to 11 d of age. Dietary treatments consisted of a control diet (no added glycerin) and a diet containing 6% glycerin (94% control diet + 6% glycerin). Four dietary treatments were provided in experiment 2 (from 17 to 24 d of age) and 3 (from 38 to 45 d of age). Diets in experiment 2 and 3 were 1) control diet (no added glycerin); 2) 3% added glycerin (97% control diet + 3% glycerin); 3) 6% added glycerin (94% control diet + 6% glycerin); and 4) 9% added glycerin (91% control diet + 9% glycerin). Diets in experiment 1 and 2 were identical, but the diet used in experiment 3 had reduced nutrient levels based on bird age. In experiments 2 and 3, broilers were fed 91, 94, 97, and 100% of ad libitum intake so that differences in AMEn consumption were only due to glycerin. A single source of glycerin was used in all experiments. Feed intake, BW, energy intake, energy excretion, nitrogen intake, nitrogen excretion, AMEn, and AMEn intake were determined in all experiments. In experiment 1, AMEn determination utilized the difference approach by subtracting AMEn of the control diet from AMEn of the test diet. In experiments 2 and 3, AMEn intake was regressed against feed intake with the slope estimating AMEn of glycerin. Regression equations were Y = 3,331x -72.59 (P < or = 0.0001) and Y = 3,348.62x -140.18 (P < or = 0.0001) for experiments 2 and 3, respectively. The AMEn of glycerin was determined as 3,621, 3,331, and 3,349 kcal/kg in experiments 1, 2, and 3, respectively. The average AMEn of glycerin across the 3 experiments was 3,434 kcal/kg, which is similar to its gross energy content. These results indicate that AMEn of glycerin is utilized efficiently by broiler chickens.

Glycerine derived from biodiesel production as a feedstuff for broiler diets

“…and its concentration was analyzed in a commercial laboratory (Table 1). Glycerol concentration was determined by high-performance liquid chromatography (HPLC), with electro-chemical detection, according to the methodology adapted from Silva (2004) and Dionex Corporation (2006). The ingredient composition and the calculated nutritional values are presented in Tables 2, 3, 4, and 5.…”

“…Glycerine gross energy value was determined as 3,602 kcal/kg, using a calorimetric bomb. The determination of metabolizable energy was based on Dozier et al (2008), who determined that the coefficient of metabolizability of glycerine gross energy is 95%; therefore, the calculated metabolizable energy was 3,422 kcal/kg. The apparent metabolizable energy value (AME) was based on the study of Dozier et al (2008), because the composition of the glycerine products in both studies was similar.…”

“…Research studies with broilers reported that the coefficient of metabolization of gross energy (GEMC) of glycerine products containing 85-90% glycerine range between 95% (Dozier et al, 2008) and 85% (Gianfelici, 2009;Oliveira et al, 2010), demonstrating that broilers utilize this feedstuff efficiently .…”

Use of biodiesel co-products (Glycerol) as alternative sources of energy in animal nutrition: a systematic review

“…For finishing pigs, the addition of 30% glycerol with a purity of 97.5%, the ME was 3,723 kcal/kg (Mendoza et al 2010). For chickens aged between 7 and 10 days, a diet containing from 3% to 6% glycerol showed ME values of 3,621 kcal/kg, turning to 3,331 kcal/kg and 3,349 kcal/ kg, for chickens aged between 21-24 days and between 42-45 days of life respectively (Dozier et al 2007). Also in chickens, it was found that the ME values of feeds containing glycerol were 3,598, 4,911 and 3,777 kcal / kg for diets containing 70% glycerol from soybean oil, 9.92% from mixture of frying oil and lard and 79.32% (from semi-purified process) respectively (Lima et al 2012).…”

Digestibilidade e energia metabolizável da glicerina em cães

“…Recentemente, foram realizados estudos com a inclusão de glicerina na dieta de frangos e suínos (LAMMERS et al, 2008;DOZIER et al, 2008), porém, não foram encontrados trabalhos referentes ao uso deste coproduto na nutrição de cães. Com isso, o objetivo deste estudo foi avaliar a digestibilidade, a energia metabolizável (EM) e as características de fezes de cães alimentados com dietas contendo crescentes níveis de glicerina, bem como o teor de EM da glicerina em cães.…”