Title: | Implementation of net energy evaluating system in laying hens: Validation by performance and egg quality |
Contributor(s): | Barzegar, Shahram (author); Wu, Shu-Biao (author) ; Choct, Mingan (author); Swick, Robert A (author) |
Publication Date: | 2020-05 |
Early Online Version: | 2020-03-31 |
Open Access: | Yes |
DOI: | 10.1016/j.psj.2020.01.012 |
Handle Link: | https://hdl.handle.net/1959.11/29313 |
Abstract: | | Three experiments were conducted to determine the effect of different dietary net energy (NE) and AMEn ratios (NE:AMEn) on performance, egg quality, and heat production (HP) in laying hens. In experiment 1, 62 Hy-Line Brown hens were fed 2 treatments with 31 replicates from 44 to 54 wk of age. In experiment 2, 600 hens of the same strain were fed 3 treatments from 22 to 42 wk of age with 10 replicates. Both used a completely randomized design. Diets were based on corn, wheat, wheat bran, barley, soybean meal, canola meal, meat and bone meal, and canola oil. In both experiments, the NE:AMEn ratio of diets was increased with higher oil inclusion compared with T1 controls. The AMEn (kcal/kg), NE (kcal/kg), ether extract (g/kg), and CP (g/kg), respectively, on a DM basis in experiment 1 was T1: 3,011, 2,288, 42, 202 and T2: 3,023, 2,374, 81, 203; and in experiment 2, T1: 3,026, 2,324, 25, 187; T2: 2,949, 2,315, 61, 185; and T3: 3,026, 2,397, 73, 181. Increasing the ratio of NE:AMEn decreased feed intake (P < 0.001) and increased egg mass (P < 0.05) in experiment 2 and increased egg weight (P < 0.01), decreased feed conversion ratio (P < 0.01), increased egg albumen % (P < 0.001), and decreased yolk % (P < 0.05) and shell % (P < 0.05) compared with T1 controls in both experiments. Haugh units and yolk color scores were increased with high NE:AMEn in both experiments (P < 0.001; P < 0.01). Experiment 3 was conducted in calorimetry chambers to measure HP in birds fed experiment 2 diets. Increasing the NE:AMEn increased total retained energy (RE), RE as fat, and RE in the body (kcal/kg BW0.75/D) and NE:AME. The results indicate that using oil to increase the NE:AMEn results in improved performance and egg quality and more efficient energy utilization.
Publication Type: | Journal Article |
Source of Publication: | Poultry Science, 99(5), p. 2624-2632 |
Publisher: | Elsevier BV |
Place of Publication: | Netherlands |
ISSN: | 1525-3171 0032-5791 |
Fields of Research (FoR) 2008: | 070204 Animal Nutrition |
Fields of Research (FoR) 2020: | 300303 Animal nutrition |
Socio-Economic Objective (SEO) 2008: | 830309 Poultry |
Socio-Economic Objective (SEO) 2020: | 100411 Poultry |
Peer Reviewed: | Yes |
HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
Appears in Collections: | Journal Article School of Environmental and Rural Science
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