Naslov
Feeding to produce n-3 fatty acid-enriched table eggs

Autori
Kralik Gordana ; Grčević Manuela ; Hanžek Danica ; Margeta Polonca ; Galović Olivera ; Kralik Zlata

Izvornik
JOURNAL OF POULTRY SCIENCE (1346-7395) 57 (2020), 2; 138-147

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
egg quality ; fish oil ; n-3 PUFA ; Schizochytrium limacinum ; table eggs

Sažetak
This study aimed to modify the feed mixtures of laying hens to enrich the consumer eggs with n- 3 polyunsaturated fatty acids (PUFA): α- linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). One hundred and twenty Tetra-SL laying hens used in the study were divided into three groups of 40 laying hens arranged in five repetitions: C, control with 5% soybean oil ; E1, 0.5% fish oil + 0.5% microalgae Schizochytrium limacinum ; and E2, 0.75% fish oil + 0.75% microalgae. The composition of the mixtures was balanced at the level of 17.5% raw protein and 11.81 ME MJ/kg metabolic energy (ME). Feed and water were provided ad libitum, and the experiment lasted for 21 days. In this study, the different physical and chemical properties of eggs, the fatty acid profile and lipid oxidation of fat in egg yolks were analyzed. The results of the study showed that the weight of the egg yolk and that of the shell depended on the feeding treatments (P=0.014 and P<0.001), and the weight of eggs and basic parts, as well as the thickness of the shell depended on the storage duration (P<0.001). The storage time affected the pH of egg yolk and albumen and the reduction in Haugh units and albumen height (P<0.001). Significant differences were observed in the content of ALA, DHA, Σn-3 PUFA (mg/100 g) and the n-6/n-3 PUFA ratio between the C and E1/E2 egg groups (P<0.001). The results of the study indicate that it is sufficient to use a lower level of fish oil and the microalgae Schizochytrium limacinum in hens’ feed to achieve a satisfactory increase in n-3 PUFA in eggs, while maintaining optimal values of egg quality and freshness indicators.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija), Biotehnologija

POVEZANOST RADA