EFFECT OF BETAINE, CHOLINE AND METHIONINE ON PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE, EGG QUALITY AND SOME BLOOD PARAMETERS OF LOCAL LYING HENS UNDER ENVIRONMENTAL STRESS CONDITIONS.

Dorra, TorK M.; Raya, A. H.; Awadein, Nasra B.; Abou-Ouf, Asmaa M.

doi:10.21608/jappmu.2014.70508

EFFECT OF BETAINE, CHOLINE AND METHIONINE ON PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE, EGG QUALITY AND SOME BLOOD PARAMETERS OF LOCAL LYING HENS UNDER ENVIRONMENTAL STRESS CONDITIONS.

Document Type : Original Article

Authors

¹ Department of Poultry Production, Faculty of Agriculture, Mansoura University, EGYPT..

² Poultry Breeding Research Department, Animal Production Research Institute, ARC, Ministry of Agriculture, EGYPT.

10.21608/jappmu.2014.70508

Abstract

The objective of this study was to determine the effects of dietary supplementation with different betaine , choline and methionine levels on productive performance, egg quality and some blood parameters of laying hens under high ambient temperature. Two hundred and thirty one birds (210 pullts +21cocks ) at 24 weeks -old from Inshas developed strain were divided into seven groups of 30 pullets in three replicats ( 10 pulles and one cock ). The frist group was fed the basal diet without supplementation (control 0 % ) ,the second and the third groups were fed the same diet with betaine (0.1 and 0.2 % ,respectively). Choline and methionine were also supplemented at 0.2 % and 0.4 % for choline and 0.1 % and 0.2% for methionine in group 4 to 7 . Birds of each group were housed in open floor pen .
Results showed that ,body weight change (g/day) increased and feed conversion ( g feed / g egg) improved significantly by dietary supplementation of methionine (0.2% ) during the period from 24 to 36 wks of age . Rectal temperature and respiratory rate were decreased significantly with supplementation of betaine ( 0.1%) and methionine (0.1%) in diet as compared to control group, and no significant effect on egg quality traits except egg weight . It is concluded that supplemental dietary betaine, choline and mithionine enhanced growth performance and reduced respiration rate and rectal temperature and improved some blood parameters forInshas strain subjected to heat stress.

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