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Title: Application of Removable Coatings and Storage Time on Internal Quality of Broiler Hatching Eggs

item MAULDIN, JOSEPH - University Of Georgia
item Buhr, Richard - Jeff
item Jones, Deana
item SANTOS, J - University Of Georgia
item AGGREY, SAMUEL - University Of Georgia

Submitted to: Poultry Science Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 4/2/2012
Publication Date: 7/9/2012
Citation: Mauldin, J.M., Buhr, R.J., Jones, D.R., Santos, J., Aggrey, S.E. 2012. Application of Removable Coatings and Storage Time on Internal Quality of Broiler Hatching Eggs [abstract]. Poultry Science Meeting. 91(Suppl.1):167. p.91. . Poultry Science Meeting. 91(Suppl. 1):167. p.91.

Interpretive Summary:

Technical Abstract: Previous research suggests treating hatching eggs with various removable coating formulations prior to extended egg storage resulted in better hatchability than non-coated controls. It is thought that coatings may preserve internal egg quality resulting in higher hatchability. This study involved four coating groups (Formula 1, Formula 2, and formula 2 sanitized, and untreated control) and four storage times (1 d: 1, 2, and 3 wk) in a 4 X 4 factorial design. Eggs were collected from a commercial broiler breeder farm beginning at 38 weeks age. After collection, eggs were stored overnight and coated with coating formulations the next morning by heating the solutions to 950F and spray-coating eggs in a commercial hatching egg-sanitizing machine. Collections were staggered so that eggs to be stored 3 wks were coated first followed by 2 wk stored eggs the next week. Coating removal involved passing eggs through the egg sanitation machine with heated water spray (115 to 1200F) with 50 ppm chlorine. Measures of egg quality included pH, Haugh units (HU), albumen height, and yolk moisture. Control eggs had significantly higher pH values at all 4 storage times than any of the RAC groups. There were minute variations among coated groups with the exception of the 3 wk group, where each treatment group was significantly different from each other. The control group had the highest pH (9.22) and Formula 2 san had the lowest (8.80). HU and albumen height showed no significant differences among treatment groups at 1 d storage. Statistical separation of the groups began at 1 wk and continued through 3 wk. HU and albumen heights were lower in the untreated controls than in any coating group, indicating better egg quality in coated treatments. Differences in yolk moisture content varied significantly with storage time. 1 d stored eggs had the lowest values and 3 wk stored eggs had the highest moisture content. No differences were observed due to coating treatment. Coating appears to offer beneficial effects in maintaining internal egg quality and hatchability to segments of the broiler industry where storage time is an issue.