Naslov
The influence of eggshell as calcium source on egg and bone characteristics and serum profile of aged laying hens

Autori
Kis, Goran ; Janjecic, Zlatko ; Bedekovic, Dalibor ; Salajpal Kresimir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
The Proceedings of XXV World's Poultry Congress / Ning Yang, Ling Lian, Jiangxia Zheng, Xiangping Liu and Changxin Wu - Peking : World's Poultry Science Association, Association of Animal Science and Veterinary Medicine, 2016, 37-37

Skup
XXV World's Poultry Congress 2016

Mjesto i datum
Peking, Kina, 05.09.2016. - 09.09.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Calcium source, eggshell, laying hens

Sažetak
This experiment was conducted to determine the effects of eggshell as calcium source in aged laying hen diets on laying performance, egg and eggshell quality, serum Ca and P concentration and bone characteristics. A total of seventy five ISA Hisex Brown laying hens, were assigned to five treatment diets ; including 100% limestone as control, 100% eggshell (particle size 2, 0 mm and 0, 5 mm) and 50% limestone with 50% eggshell both particle size respectively. Each treatment had five replicates with three hens each. After two weeks of acclimation, the birds were fed the experimental diets for five week. Initial and final body weights, feed consumption and feces production was recorded. Eggs production, weight and quality characteristics were measured. Serum Ca concentrations level were determined and finally, tibia contents of Ca and P concentrations were analyzed. Beside some differences among hens results of this experiment indicated that, there was no significant effect of dietary treatment on body weight and feed consumption. Replacing limestone in the experimental diets with fine and coarse ground, sterilized eggshell had no significant effect on egg production, egg weight and eggshell quality between treatments. Serum Ca concentration had the most significantly increase (p=0, 002) in hens fed diet with 100 % coarse eggshell. The same treatment also caused the most significant increase (p=0, 022) in the P content and decrease (p=0, 047) of Ca content in tibia in relation to other treatments. It can be concluded that hatchery waste, as chicken egg shells, can be used as cheap and ecologically advisable Ca source in layer diets without an adverse effect on body weight, feed consumption, egg weight, egg production, egg and eggshell quality. Furthermore coarse grinding of eggshell the most effects on serum and bone mineralization, so more researches of this natural Ca source in aged laying hens are recommended.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA