Use of glycerine in poultry diets

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

“…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). Considering the high digestibility of glycerol in the diet of chickens, Cerrate et al (2006) assumed the value of 3,527 kcal/kg based on the gross value obtained from the calorimetric bomb (3,596 kcal/kg of ME for glycerol with purity between 2.5% and 10%), however the inclusion of 10% caused negative effects on the performance of these animals.…”

“…Considering the high digestibility of glycerol in the diet of chickens, Cerrate et al (2006) assumed the value of 3,527 kcal/kg based on the gross value obtained from the calorimetric bomb (3,596 kcal/kg of ME for glycerol with purity between 2.5% and 10%), however the inclusion of 10% caused negative effects on the performance of these animals. Thus, a better understanding of the correlation between the purity of glycerol and its role as source of dietary energy will allow the formulation of balanced diets in order to improve animal production performance (Alvarenga et al 2012). DISCUSSION Systematic reviews can promote much insight into the scientific community in general, since they allow a more complete and clear view of the results from different studies in the same field and also suggest the best protocols to be used and / or searched.…”

Impact of increasing crude glycerine levels in diet on growth, carcass traits, body measurements and blood cholesterol in growing Japanese quails

“…It was also estimated that glycerine could partially replace maize in poultry feed if its market price is encouraging (Terré et al, 2011). Alvarenga et al (2012) found that every kg of clean glycerol contains 4100 kcal gross energy, so it could be considered as an energy-rich additive to poultry diet. Its energy potential was earlier observed by Kroupa et al (2011) who fed broiler chickens with glycerine.…”

Impact of feeding increasing crude glycerine levels on growth performance, glycerine kinase gene expression, nutrient digestibility and litter quality in broiler chickens

“…The generated amount vastly exceeds the demand by cosmetics, pharmaceutical, or other chemical industries (Suchý et al, 2011), indicating the need to find viable uses of CG surplus (McLea et al, 2011). The major component of CG is, obviously, glycerine (Alvarenga et al, 2012), a sugar alcohol, which is energy yielding, thus making it an interesting source of energy for animal diets (McLea et al, 2011).…”

“…Several studies have investigated the use of CG as an energy source in diets for swine (Lammers et al, 2008;Papadomichelakis et al, 2012;Schieck et al, 2010;Seneviratne et al, 2011;Shields et al, 2011;Zijlstra et al, 2009) and poultry (Yalçin et al, 2009;Min et al, 2010;Dozier et al, 2011;McLea et al, 2011;Suchý et al, 2011;Alvarenga et al, 2012;Henz et al, 2014) with contradictory findings. Indeed, in broiler chickens, Dozier et al (2008) reported an average apparent metabolizable energy (AMEn) content of CG to be 14.4 MJ/kg, whereas McLea et al (2011) obtained values of 14.7 and 15.2 MJ/kg for different types of CG.…”