Abstract
Turkey breeder hens of the Quebec line were fed diets with no added fat, 3.5% animal-vegetable fat blend (A-V fat), or 3.5% fat provided by 4.4% dry fat product (DF), from 30 to 49 wk of age. The addition of A-V fat and DF to the breeder diets significantly (P < 0.05) reduced embryonic mortality between 8 and 28 d of incubation but had no effect on other reproductive parameters. Feeding diets with 0 or 5% A-V fat in a prebreeder diet from 21 to 28 wk of age in another experiment led to a detectable decrease in subsequent egg production. Those diets were followed by breeder diets with either no added fat, 5% A-V fat, 5% corn oil, or 5% olive oil from 28 to 48 wk of age. Hens fed no added dietary fat exhibited significantly higher fertility while those fed 5% corn oil laid the heaviest eggs. Hens fed 5% olive oil exhibited significantly higher embryo livability from 8 to 28 d of incubation and the highest hatchability of fertile eggs. Fatty acid compositions of plasma and yolk lipids were affected by the dietary fat composition. Key words: Turkey hens, dietary fat, reproduction, fatty acid
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