Analyses on the Status of Eggshell Breakage in the Step of Egg Conveyer System of the Laying Hen House

산란계사의 계란 이송단계에 따른 파란발생 실태분석

  • Oh, K.Y. (National Institute of Agricultural Engineering, R.D.A) ;
  • Ruy, B.G. (National Institute of Agricultural Engineering, R.D.A) ;
  • Noh, J.S. (National Institute of Agricultural Engineering, R.D.A) ;
  • Choi, D.S. (National Institute of Agricultural Engineering, R.D.A) ;
  • Choe, K.J. (National Institute of Agricultural Engineering, R.D.A)
  • 오권영 (농촌진흥청 농업공학연구소) ;
  • 유병기 (농촌진흥청 농업공학연구소) ;
  • 노진상 (농촌진흥청 농업공학연구소) ;
  • 최동수 (농촌진흥청 농업공학연구소) ;
  • 최광재 (농촌진흥청 농업공학연구소)
  • Published : 2008.04.30

Abstract

Broken eggs not only cause the economic loss in the egg producing industry, but also may not be good for the consumer's health. In order to identify the causes of eggshell breakage in laying hen houses, analyses on the status of eggshell breakage in the step of egg conveyer system of the laying hen house were conducted. The survey of eggshell breakage rate was implemented by four different stages egg conveying system. In the results, the breakage rate showed 4.7% in the egg collection belt, 2.5% in the egg elevator, 1.7% in the egg grading system and 0.9% in the egg conveyor belt. In particular, to Hy-line Brown variety, as the hens' raising week old increased, the breakage rate of eggshell increased while the strength of eggshell decreased. In the regression analysis between the breakage rate of eggshell and the strength of eggshell, the coefficient of determination ($R^2$) by the test of significance was computed as 0.7, therefore the changes of the strength of eggshell affects the breakage rate of eggshell. However, between the strength of eggshell and thickness of egg shell, and between the strength of eggshell and strain of eggshell, there was no significant difference detected in the regression analysis.