%0 Journal Article
%T The impact of supplemental L-threonine in broiler breeder molting
hen diets on egg production, egg weight, and hatching traits
%A Abolfazl Gorbani
%A Habib Aghdam Shahryar
%A Mehdi Salmanzadeh
%A Payam Panahi moghaddam
%A Saeed Ashrafi
%J -
%D 2011
%X The impacts of supplemental L-threonine in broiler breeder molting hen diets were evaluated. 600 hens were obtained from (Cobb-500) broiler breeder strain at 60 weeks of age. All hens were collected from the same breeder flock and weighed on a balance with 10 g precision. At 60 weeks of age, hens based on a completely randomized design were divided into 5 treatments with 4 replicates per treatment and 30 hens and 3 roosters per replicate. Control hens were fed a corn-soybean commercial broiler breeder molting diet containing 0.48% threonine (Thr). Experimental diets containing, basal diet with 0.52, 0.57, 0.62, and 0.67% Thr were fed. Egg samples were analyzed for egg weight, egg production and hatching traits in newly-hatched chickens. The results of the study indicate that, egg production increased with increasing dietary threonine levels up to 0.67% Thr in the diet. But, the weight of eggs was significantly lower than control. Dietary L-threonine supplementation didn¡¯t show any significant effect on hatchability of broiler breeder molting hens from 60 to 63 weeks of age. Weight of newly-hatched chickens was significantly lower when supplemental L-threonine in broiler breeder molting hen diets from 60 to 63 weeks of age were received than control group. These data clearly indicate a potential important impact on egg production by increasing dietary threonine nutrition of a broiler breeder molting hen.
%K L-threonine
%K egg production
%K egg weight
%K hatching traits
%K broiler breeder molting
hen.
%K list of open access journals
%K open access
%K open access journals
%K open access publication
%K open access publisher
%K open access publishing
%K open access journal articles
%K imedpub
%K imedpub publishing
%K insight medical publishing
%K imedpub online
%U https://www.imedpub.com/articles/the-impact-of-supplemental-lthreonine-in-broiler-breeder-moltinghen-diets-on-egg-production-egg-weight-and-hatching-traits.php?aid=13302