EFFECT FROM THE ADDITION OF XTRACT ON PRODUCTIVITY, MORPHOLOGICAL AND INCUBATION CHARACTERISTICS OF EGGS. | Ефект от добавката на xtract върху продуктивността, морфологичните и инкубационните качества на яйцата
2011
Chotinski, D., Institute of Animal Science, Kostinbrod (Bulgaria) | Ignatova, M., Institute of Animal Science, Kostinbrod (Bulgaria) | Petkov, E., Institute of Animal Science, Kostinbrod (Bulgaria)
An experiment was performed with 320 laying hens from Hy Line breed, divided into two groups: control group and experimental group. The laying hens in the control group received a feed mix with no supplement and the experimental group was fed with the addition of 0.2% XTRACT. It was determined that the addition of XTRACT in the feed mix: increases egg production by 7.0%, decreases the feed cost per 1 egg by 2.7% and increases egg weight by 0.89 g. Including XTRACT in the feed mix induces some changes in the morfological characteristics of the eggs: decreases yolk index and albumen index, but increases the weight and thickness of eggshell. The addition of XTRACT also increases by 10.3% the hatchability of fertile eggs and by 8% the number of chicks hatched from eggs set in incubator.
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