Effect of different inclusion levels of defatted corn germ meal in diets supplemented with phytase for laying hens
DOI:
https://doi.org/10.5433/1679-0359.2012v33n5p1991Keywords:
Alternative feed, Egg quality, Enzyme, Nutrition.Abstract
The experiment was designed to evaluate the performance, egg quality and minerals on tibia of laying hens from 28 to 44 weeks of age subjected to diets containing varying levels of DCGM (0, 12 and 30%) and phytase (0, 500 and 1000 FTU/kg of diet). The experiment was carried in four cycles of 28 days and the variables studied were: the performance (feed intake, egg production, egg weight, egg mass and feed conversion) and egg quality (egg specific gravity, yolk color, shell thickness and Haugh unity value). In the finish of experiment, five birds per treatment were abated for determination of the calcium and phosphorus in tibia. There was no interaction between DCGM and phytase on evaluated parameters. Inclusion of DCGM resulted in significantly higher feed intake and worst yolk pigmentation, than the 0% treatment. Increasing the phytase dose to 1000 FTU/kg improves yolk pigmentation. For the others variables no effect were observed for levels of DCGM or phytase. Based on the results from the present study, DCGM could be included at a rate of up to 30% of a commercial layer diets without any significant detrimental effects on the egg production, but with yolk pigment addition. The phytase improve the yolk color.
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