Estimating energy utilization in laying hens: what are the best response criteria?
| dc.contributor.author | Lyons, Amy M. | en |
| dc.contributor.author | Granghelli, C.A. | en |
| dc.contributor.author | Persia, Michael E. | en |
| dc.date.accessioned | 2023-09-07T17:44:14Z | en |
| dc.date.available | 2023-09-07T17:44:14Z | en |
| dc.date.issued | 2023-09 | en |
| dc.description.abstract | An experiment was conducted to evaluate the effects of varying dietary energy on the performance and energy storage in laying hens from 36 to 52 wk of age. A total of 252 Hy-Line W-36 laying hens were housed in cages with 3 birds per cage and 12 replicate cages per treatment. Birds were control fed 1 of 7 experimental diets ranging in dietary energy from 2,750 to 3,050 kcal/kg with a 50 kcal/kg difference among each of the diets. Egg production, energy intake, feed intake, egg weight, egg mass, and feed efficiency were calculated every 2 wk so that performance data could be analyzed every 2 wk using repeated measures analysis. Hens were weighed every 4 wk for repeated measures analysis and carcass total, lean, and fat mass were determined at 52 wk using dual X-ray absorptiometry. Correlations between dietary energy and energy intake with performance parameters, and body composition were generated. Dietary energy (kcal/kg) was significantly correlated with all performance parameters except hen housed egg production (HHEP; P = 0.07) and lean carcass mass (P = 0.60). For dietary energy, the highest correlations were total carcass mass (r = 0.60) and carcass fat mass (r = 0.54). Energy intake (kcal/d) was significantly correlated with all performance parameters except feed intake (P = 0.18). The highest correlations were between energy intake and total carcass mass (r = 0.63) or body weight (r = 0.51). These results suggest that dietary energy has a more pronounced effect on body mass and fatty tissue over the short run (16-wk period) before direct performance responses are observed. Therefore, hen body weight and composition can be used as a more sensitive measurement of shorter-term hen energy status than egg production or feed efficiency. | en |
| dc.description.sponsorship | This research and salary of A. M. Lyons was partially supported by the John Lee Pratt Animal Nutrition SENIOR RESEARCH Scholar Program. | en |
| dc.description.version | Published version | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.doi | https://doi.org/10.1016/j.japr.2023.100357 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/116237 | en |
| dc.identifier.volume | 32 | en |
| dc.language.iso | en | en |
| dc.publisher | Elsevier | en |
| dc.rights | Creative Commons Attribution 4.0 International | en |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en |
| dc.subject | body composition | en |
| dc.subject | energy intake | en |
| dc.subject | fat mass | en |
| dc.subject | egg production | en |
| dc.subject | laying hen | en |
| dc.title | Estimating energy utilization in laying hens: what are the best response criteria? | en |
| dc.title.serial | Journal of Applied Poultry Research | en |
| dc.type | Article - Refereed | en |
| dc.type.dcmitype | Text | en |