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Growth Performance of Broilers as Influenced by Different Levels and Sources of Methionine Plus Cysteine
Faculty
Agriculture
Year:
2019
Type of Publication:
ZU Hosted
Pages:
Authors:
Mahmoud Mohamed Ibrahiem Ibrahiem Elagawany
Staff Zu Site
Abstract In Staff Site
Journal:
Animals Animals
Volume:
Keywords :
Growth Performance , Broilers , Influenced by Different Levels
Abstract:
Abstract: The objective of this work was to evaluate the utilization of methionine from DL-methionine (DL-Met) and L-methionine (L-Met) with dierent levels of dietary methionine plus cystine (Met+Cyst) in broilers. The experimental diets were formulated by using three levels of Met + Cyst, i.e., 74%, 77% and 80% of digestible lysine. Met + Cyst was provided either from DL-Met or L-Met. A total of 450 day-old broilers were divided into six groups (five replicates of 15 birds each) in a 3 2 factorial arrangement under completely randomized design. Weight gain (WG), feed intake (FI) and feed conversion ratio (FCR) was determined. At the end of the experiment (35 days), two birds from each replicate were slaughtered to determine carcass characteristics and serum homocysteine. Results indicate that the combined effect of L-Met and DL-Met significantly aected (p < 0.05) the WG in the starter period and FI in the finisher period. Neither source nor level of methionine influenced (p > 0.05) the FI, WG and FCR of broilers during the starter, finisher or overall phase of growth. The interaction between sources and levels of methionine did not influence (p > 0.05) the feed intake, weight gain and FCR during the overall phase of growth. Source of methionine had no (p > 0.05) eect on carcass characteristics. Methionine levels had a significant eect (p < 0.05) on carcass weight, chest weight and thigh weight. The interaction between sources and levels of methionine had a significant (p < 0.05) eect on the liver weight. The sources of methionine had significant (p < 0.05) eects on the liver and heart weight, while methionine levels significantly influenced (p < 0.05) the liver and gizzard weight. Finally, it was concluded that if DL-Met and L-Met are included in feed at a standard level, they are equally effective as a source of methionine for broilers.
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Department Related Publications
Mohamed Ezzat Mohamed Abdelhak Elhweny, "SOME FACTORS AFFECTING OSTRICH CHICK WEIGHT AT HATCH AND ITS PERFORMANCE DURING THE FIRST FOUR WEEKS OF AGE", الجمعية المصرية لعلوم الدواجــن, 2009
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Olwi Ali Mohamed Hasanien, "Effect of Graded Replacement of Corn by Broken Rice in Growing Japanese Quail Diets on Growth Performance, Carcass Traits and Economics.", Asian Journal of Animal Sciences 9 (6): 4-411, 2015 ISSN 1819-1878 / DOI: 10.3923/ajas.2015.404.411 © 2015 Knowledgia Review, Malaysia, 2016
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Mahmoud Mohamed Ibrahiem Ibrahiem Elagawany, "Phytochemistry and beneficial impacts of cinnamon (Cinnamomum zeylanicum) as a dietary supplement in poultry diets", World's Poultry Science Journal, 2018
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Mohamed Ezzat Mohamed Abdelhak Elhweny, "Phytochemistry and beneficial impacts of cinnamon (Cinnamomum zeylanicum) as a dietary supplement in poultry diets", World's Poultry Science Journal, 2018
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Mahmoud Mohamed Ibrahiem Ibrahiem Elagawany, "Responses of growing rabbits to supplementing diet with a mixture of black and red pepper oils as a natural growth promoter", Blackwell Verlag GmbH, 2018
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