Effects of Dietary Supplementation of Linseed Oil on Egg Quality and Monounsaturated Fatty Acid Content of Gallus domesticus Eggs
Effects of Dietary Supplementation of Linseed Oil on Egg Quality and Monounsaturated Fatty Acid Content of Gallus domesticus Eggs
Suhu Duan, Zaiqiang Li, Zhenzhen Fan, Mengran Qin, Xiaoxue Yu* and Liuan Li*
ABSTRACT
One of our key points is to study whether different proportions of linseed oil can affect egg quality and monounsaturated fatty acid content. A total of 160 randomly selected healthy Gallus domesticuss, aged 26 weeks, were randomly divided into 4 groups, and each group contained 40 chickens that were fed outdoors in an activity area of 63 m2 with free food and portable water. The CK was fed basic diet, and the experimental group added 1%, 3% and 5% linseed oil to the basic diet (TP1, TP2, TP3), respectively. On the 10th, 25th and 40th day of the formal trial, 36 eggs were randomly selected from each group, of which 12 were used to detect egg quality and 24 to detect monounsaturated fatty acids in eggs. The results showed that a certain proportion of linseed oil added to diet had no significant effect on egg weight, egg yolk weight, egg yolk color, egg yolk ratio, Haugh unit and egg white ratio (P > 0.05). On the 25th and 40th day, there were significant effects on the quality of eggshell (P < 0.05) and no remarkable influence on the contents of myristoleic acid (C14:1), palmitoleic acid (C16:1) or oleic acid (C18:1n9c) in yolk (P > 0.05); On the 10th day, the content of pentadecenoic acid (C15:1) in yolk of the TP1 was clearly higher than that of the CK (P < 0.05); On the 25th day, the content of C15:1 in yolk of the TP2 was evidently higher than that of the CK (P < 0.05). In the end, we found that the addition of linseed oil to diet had less effect on the egg quality and the content of monounsaturated fatty acid (MUFA) in the eggs of Gallus domesticus.
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