The effect of oviposition and time of marble addition to feed on quality of table eggs | Uticaj ovipozicije i vremena dodavanja mermera u hranu na kvalitet konzumnih jaja
2005
Pavlovski, Z., Institut za stocarstvo, Beograd - Zemun (Serbia) | Vitorovic, D., Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Skrbic, Z., Institut za stocarstvo, Beograd - Zemun (Serbia) | Lukic, M., Institut za stocarstvo, Beograd - Zemun (Serbia)
Investigation of the effect of oviposition and time of addition of marble was carried out on 360 Shaver layer hens divided into three groups. The first goup of hens was control and they were fed standard mixture, the second group of hens received additionally each morning 2 g of ground marble distributed over the feed, and third group of hens received 2 g of ground marble twice a day - 1 g in the morning (8 a.m.) and 1 g in the afternoon (1 p.m.). Obtained results have shown that oviposition had no significant effect on investigated traits. Addition of large particles of marble had positive effect on strength of egg shell. Compared to control group, morning addition of 2 g of marble per hen or addition of 1 gr in the morning and 1 g in the afternooon caused statistically highly significant increase of egg shell strength expressed through greater breaking force and lower value of shell deformation as well as higher values of shell mass and thickness. Compared to control and trial group 1, quality of egg white expressed through Haugh units was significantly lower in trial group 3.
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