Naslov
Effects of Nanofeed® ; preparation on egg quality and biochemical indicators in laying hens' serum

Autori
Kralik, Gordana ; Šperanda, Marcela ; Gajčević, Zlata

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of XII European Poultry Conference / Romboli, I. - Verona : World's Poultry Science Association, 2006, 1-6

Skup
XII European Poultry Conference

Mjesto i datum
Verona, Italija, 10.09.2006. - 15.09.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
laying hens ; Nanofeed® ; preparation ; egg quality ; biochemical indicators

Sažetak
Nanofeed® ; , a preparation that contains tribomechanically activated zeolite clinoptilolite, is used as a potential antioxidant supplemented to food. The aim of this research was to determine the effect of Nanofeed® ; supplementation on the quality of eggs and on the biochemical indicators in serum of laying hens. The experiment was carried out on 240 laying hens of Hy-Line hybrid at the age of 26 weeks. Laying hens were divided into two groups and fed with commercial diets with 18% crude protein and 11.6 MJ ME. In the experimental group, 1% of corn was substituted with Nanofeed® ; . During 28 research days, body mass of laying hens, laying capability, biochemical blood indicators (glucoses, urea, creatinin, urates, total bilirubin, total protein, albumins, globulins, CRP, feritin, cholesterol, triglycerides, HDL-cholesterol, LDL-cholesterol) were measured. Egg quality (n=50 per each group) was determined on the 28th day of experiment on fresh eggs, and after 14 days of keeping eggs on +4°C the following was determined: egg mass, mass of albumen and yolk, shell mass and thickness, shell firmness, height of albumen, color of yolk, pH value of albumen and yolk, HU (Haugh units) and VN (value number) of eggs. Physical traits of eggs were determined in Egg Multi-Tester EMT 5200 and in Eggshell Force Gauge Model II. Biochemical indicators were determined in automatic analyzer Olympus AU 640. Compared to the control, the serum of laying hens in experimental group had significantly higher (P<0.05) level of creatinin, higher level of total bilirubin, total protein, feritin and lower level of triglycerides (P=0.06) measured on the 14th day of experiment. The same trend was determined on the 28th day, however, the differences were not statistically significant. There were no statistically significant differences (P>0.05) in the egg mass, thickness and firmness of shell, pH value of albumen, HU and VN in fresh eggs. In the 14-day old eggs of experimental group, there were more favorable values determined in albumen height, HU and VN (P>0.05) and significantly lower pH in egg yolk (P<0.05). Referring to the indicators of egg freshness, better freshness was determined in eggs that were produced with supplemented Nanofeed® ; .

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA