Dorra, T., Raya, A., Awadein, N., Abou-Ouf, A. (2014). 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.. test, 5(6), 337-351. doi: 10.21608/jappmu.2014.70508
TorK M. Dorra; A. H. Raya; Nasra B. Awadein; Asmaa M. Abou-Ouf. "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.". test, 5, 6, 2014, 337-351. doi: 10.21608/jappmu.2014.70508
Dorra, T., Raya, A., Awadein, N., Abou-Ouf, A. (2014). '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.', test, 5(6), pp. 337-351. doi: 10.21608/jappmu.2014.70508
Dorra, T., Raya, A., Awadein, N., Abou-Ouf, A. 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.. test, 2014; 5(6): 337-351. 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.

Journal of Animal and Poultry Production
Article 1, Volume 5, Issue 6, June 2014, Pages 337-351
Document Type: Original Article
DOI: 10.21608/jappmu.2014.70508
Authors
TorK M. Dorra1; A. H. Raya1; Nasra B. Awadein2; Asmaa M. Abou-Ouf2
1Department of Poultry Production, Faculty of Agriculture, Mansoura University, EGYPT..
2Poultry Breeding Research Department, Animal Production Research Institute, ARC, Ministry of Agriculture, EGYPT.
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.                                     
 
Keywords
Betaine; choline , methionine, laying, supplementation, productive
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