Original scientific paper

PHYSICAL AND MECHANICAL PROPERTIES OF HRVATICA HEN EGGS FROM FREE-RANGE RAISING AND THEIR COMPARISON WITH EGGS FROM CAGE HOUSING

Ante Galić orcid.org/0000-0002-0155-7228 ; University of Zagreb Faculty of Agriculture, Zagreb, Croatia
Stjepan Pliestić ; University of Zagreb Faculty of Agriculture, Zagreb, Croatia
Dubravko Filipović orcid.org/0000-0001-6845-4365 ; University of Zagreb Faculty of Agriculture, Zagreb, Croatia
Igor Kovačev orcid.org/0000-0002-0392-1089 ; University of Zagreb Faculty of Agriculture, Zagreb, Croatia
Krešimir Čopec ; University of Zagreb Faculty of Agriculture, Zagreb, Croatia
Zlatko Janječić orcid.org/0000-0001-9161-024X ; University of Zagreb Faculty of Agriculture, Zagreb, Croatia
Dalibor Bedeković orcid.org/0000-0002-7418-3968 ; University of Zagreb Faculty of Agriculture, Zagreb, Croatia

Abstract

The aim of this study was to determine physical and mechanical properties of Hrvatica hen eggs from free-range raising and their comparison with properties of Hy-Line hybrid hen eggs from cage housing. The average values of Hrvatica hen eggs length, width, geometric mean diameter, surface area and volume were found to be 55.82 mm, 40.43 mm, 45.01 mm, 6366.42 mm2 and 47835.20 mm3, respectively. According to average mass of 51.01 g, Hrvatica hen eggs can be classified as small, and according to average shape index of 72.52%, can be characterised as normal or standard. In comparison with eggs from cage housing system, Hrvatica hen eggs had stronger shell, their average firmness was 20.1% higher and required in average 9.3% greater force to rupture egg.

Keywords

egg dimensions; shape index; shell strength; rupture force; egg firmness

Hrčak ID:

180196

URI

https://hrcak.srce.hr/180196

Publication date:

12.4.2017.

Article data in other languages: croatian

Visits: 1.141 *