Nitrogen-Corrected Apparent Metabolizable Energy Value of Crude Glycerol for Laying Hens / Współczynnik Metaboliczności Energii Surowej Gliceryny Dla Kur Nieśnych

Abstract

Corresponding author: zsedelye@mtk.nyme.hu abstract an experiment was conducted with 64 tetra sl laying hens (placed into four groups) to determine the amen value of feed grade crude glycerol (dm 92%; glycerol 86.80%; methanol 0.04%; fat 0.49%; ash 4.67%; ge 15.59 mJ/kg). all groups were given a 100 g basal diet per day (amen value 11.46 mJ/kg; protein 16.97%; ca 3.49%; p (non-phytate) 0.56%; lysine 0.82%; methionine 0.40%; cysteine 0.29%; threonine 0.60%; tryptophan 0.19%), which was supplemented with 5%, 7.5% and 10% glycerol for the three experimental groups. hens were placed in metabolism cages (4 hens/treatment in four replicates). after a 10-day adaptation period, excreta was collected and weighed individually for 10 days. the amen value of crude glycerol (86%) was calculated as 15.30 mJ/kg for laying hens. during the experiment, egg production (90.0-90.8%), egg weight (56.8-58.0 g) and egg mass (51.2-52.7 g) were not affected by dietary treatments. feed conversion was significantly reduced by a 10% glycerol supplementation. We concluded that crude glycerol's energy is efficiently used by laying hens, and more efficiently than by broilers. The established 15.30 mJ/kg amen value of crude glycerol when fed in the daily ration to laying hens means that they utilized 97.6% of the glycerol's GE content.

The effect of replacing soya bean oil with glycerol in diets on performance, egg quality and egg fatty acid composition in laying hens

“…Yalçın et al (2010) showed that including 7.5% glycerol in the laying hen diets had no adverse effect on laying performance, egg quality characteristics or value of saturated and unsaturated fatty acids in eggs. Nemeth et al (2013) reported that egg production, egg weight and egg mass were not affected by dietary treatments (5%, 7.5% and 10% glycerol supplementation) in laying hens. However, a 10% glycerol supplementation significantly reduced feed conversion.…”

“…Lammers et al (2008), in metabolism experiments, used 48 Hy-Line W-36 laying hens, fed 0%, 5%, 10% and 15% crude glycerol in their ration and found an apparent metabolisable energy (ME) value of 15.92 MJ/kg (3805 kcal/kg). Nemeth et al (2013) calculated that the energy value of glycerol was 15.30 MJ/kg for products containing 86.8% glycerol for laying hens. Swiatkiewicz and Koreleski (2009) placed 20 Bovan Brown laying hens (five per treatment) into individual cages, feeding them daily ratios containing 0%, 2%, 4% and 6% crude glycerol to determine the AMEn value of crude glycerol (73.8% DM and 69.7% glycerol content).…”

Influence of the inclusion of co-products of the soy oil industry in poultry diets on nutrient digestibility, growth performance, and production

“…Moreover, Lammers et al (2008b); Németh et al (2014) did not report any effect on performance or quality of eggs when 10 to 15% glycerin was include in laying diets. In contrast, Németh et al (2013) reported that inclusion of 10% of glycerin hindered FCR in hens from 28 to 37 wk of age without affecting any other production trait. In general, the data indicate that glycerol can be included in diets for broiler and laying hens at levels of up to 10%, with no negative effects on performance, carcass yield, or egg and meat quality ).…”

“…Data in chapter 3 of this thesis showed that laying hens fed 7% glycerol in isonutritive diets showed the same performance than hens fed diets without glycerol. It is estimated that the AMEn of glycerol in laying hens is close to 98% of its GE in products containing 86% glycerin and 0.49% free fatty acids (Németh et al 2013). …”

“…Raw glycerin contains variable amounts of water and ash and its nutritive value depends primarily on the glycerol content. The maximum level of inclusion of GLYC in laying hen diets for optimal production, has been estimated within the range of 50 to 100 g/kg (Lammers et al, 2008;Swiatkiewicz and Koreleski, 2009;Németh et al, 2013). Also, the inclusion of GLYC in broiler diets increased dry matter (DM) and gross energy (GE) retention (Kim et al, 2013;Mandalawi et al, 2014).…”