Effects of Dietary Supplementation of Glycerol on Performance, Egg Quality and Egg Yolk Fatty Acid Composition in Laying Hens

Abstract

This study evaluated the performance and the quality and fatty acid profile of eggs from laying hens, fed with diets, containing different levels of glycerol replaced by acidulated sunflower soap stock. A total of 60 44-week-old Hy-Line W36 laying hens were distributed according to a completely randomized experimental design into four treatments, consisting of glycerol substituted of acidulated sunflower soap stock dietary inclusion levels (0, 25, 50, and 75 %), with five replicates of three birds each. Dietary treatments had no significant effect on egg production, feed intake, feed conversion ratio, egg weight and egg mass of laying hens. The inclusion of glycerol in the diet of laying hens had no significant effect on egg specific gravity, egg shell breaking strength, egg shell weight and egg shell thickness, egg shape index, albumen index, haugh unit, albumen pH, yolk pH and egg yolk color values L and b but to add glycerol in diets decreased a values in egg yolk . The inclusion of glycerol in the diet of laying hens had no significant effect on stearic, oleic, linoleic and linolenic acid contents of egg yolk. Palmitic acid content of egg yolk was significantly decreased and palmitoleic acid content of egg yolk significantly increased with the higher levels of dietary glycerol supplementation.

 

Keywords

• Glycerol,Performance,Egg Quality,Laying Hens,Fatty Acid

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