Effect of different content of fat source on production and indices of egg quality
1997
Horniakova, E. (Slovenska Polnohospodarska Univ. Nitra (Slovak Republic). Katedra Vyzivy a Krmenia Hospodarskych Zvierat)
In feed-balanced experiments with Shaver Starcross 288 layers the effect of different metabolizable energy contents altered by addition of fat was observed on egg production and some egg quality indices. In the experimental groups A1 and A2, rendering fat was used (2 and 6% resp.) and in the groups B1 and B2, rapeseed oil (2 and 6% resp.). The control group layers were fed a commercial mixture. The higher energy content in the experimental groups A2, B1 and B2 decreased feed consumption per kg of egg mass by 7.0, 5.71, and 20.41%, resp. and increased it in group A1 by 6.58%. The production of egg mass was also higher in groups A2 (6.59%), B1 and B2 (11.5%) and lower in group A1 (3.39%). Egg weight was positively influenced (P less than 0.01) only in groups A1 and B1. Egg white weight and yolk weight were not statistically higher. FA content decreased (P less than 0.05) in the groups A1 and A2 (rendering fat acid) first of all in the content of linoleic acid
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