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| Articles
by
A.M. Fouad |
Total Records (
6 ) for
A.M. Fouad |
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A.M. Fouad
,
Y. Li
,
W. Chen
,
D. Ruan
,
S. Wang
,
W. Xie
,
Y.C. Lin
and
C.T. Zheng
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Objective: Manganese (Mn) is a crucial trace element for poultry nutrition because it has multiple physiological functions. Thus, the main
goal of this study was to evaluate the effects of dietary Mn supplementation on laying performance, egg quality and antioxidant status
in Shanma laying ducks. Methodology: Five hundred and four Shanma laying ducks, at 17 weeks of age, were randomly assigned to 7
treatments, with 6 replicates per treatment and 12 ducks per replicate. Birds were fed the same basal diet, which was supplemented with
0.0 (control), 15, 30, 45, 60, 75 or 90 mg Mn/kg in the form of Mn-sulfate. Results: Results showed that dietary Mn supplementation did
not affect egg production, egg weight, feed conversion ratio, egg mass, egg quality, tibia characteristics, total antioxidant capacity,
copper-zinc superoxide dismutase or lipid peroxidation (malondialdehyde), but supplementing 90 mg Mn/kg diet significantly (p<0.05)
improved the activities of total superoxide dismutase, Mn-containing superoxide dismutase and increased Mn content in egg yolk
compared with the control group. Conclusion: These results indicate that corn-soybean meal diet containing sufficient amount of Mn
for laying performance and egg quality in Shanma laying ducks under the conditions of current experiment, but adding 90 mg Mn/kg
basal diet is required to improve the activities of Mn-containing superoxide dismutase and total superoxide dismutase and elevate Mn
content in their egg yolk. |
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O.M. El-Husseiny
,
M.O. Abd-Elsamee
,
I.I. Omara
and
A.M. Fouad
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The experiment was designed to evaluate the effect of supplemented zinc (Zn) and niacin (Nia.) on laying hen performance, egg quality, nutrient digestabilities and relative economical efficiency (EEf) from 28-43 weeks of age. Bovans White Laying hens fed diets supplemented with four different levels of Zn (70,105,140 and 175 mg/kg diet) in combination with four different levels of Nia. (30,150,300,450 mg/kg diet) in a factorial arrangement design. The diets which contained on 70 mg Zn/kg and 30 mg Nia/kg considered as a control. The results indicated that supplemented Zn and Niacin (Nia.) increased the egg production significantly (p ≤ 0.05) compared with the control group. The best feed conversion ratio (FCR) was observed when diet supplemented with Zn and Nia. at 175 and 30 or 175 and 450 mg/kg, respectively. Egg weight (EW) did not improve by supplementing Zn and Nia. Supplemented Zn at 105 mg/kg recorded the best serum total immunoglobulin titres (STIT), While, supplemented Nia. at 300 mg/kg gave the best STIT. Supplemented Zn and Nia. had significant effect on egg shell thickness (EST), blood hemoglobin (BH) and nutrient digestabilities especially improving crude protein digestibility linearly parallel with dietary Zn levels increased. Supplemented Zn at level of 105 mg/kg with 30 mg Nia/kg or 175 mg Zn/kg with 30 or 450 mg Nia/kg gave the highest economical efficiency. Feeding laying hen on diet containing 105 mg Zn and 30 mg Nia/kg resulted in the best performance, egg quality and economical efficiency. |
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A.M. Fouad
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H.K. El-Senousey
,
X.J. Yang
and
J.H. Yao
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As a result of impressive progress that made in economic traits
such as body weight gain, feed efficiency and breast yield to meet the demands
of consumers, nowadays, poultry became more susceptible to obesity, stressors
and less ability to resist the common diseases in commercial farms. L-Arginine
(L-Arg) supplementation in poultry diets improves egg production, egg weight,
modulates lipid metabolism toward reducing total body fat accumulation to improve
meat quality and increases antioxidant defense under normal conditions. Also
under stress conditions L-Arg has the ability to alleviate this stress and to
normalize the growth performance. Dietary L-Arg supplementation reduces ascites
mortality under low ambient temperatures, attenuates the adverse effects of
heat stress and high stock density, activates the immune system and enhances
its responses to different common diseases in poultry farms. Therefore, L-Arg
plays a pivotal role in poultry production. |
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A.M. Fouad
,
W. Chen
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D. Ruan
,
S. Wang
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W.G. Xia
and
C.T. Zheng
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Modern strains of poultry have been produced to meet the demands of consumers in terms of quantity and they are affected by problems associated with immunity (sensitivity to infection with different diseases), stressors (high sensitivity to different stressors) and product quality (meat and egg quality). In particular, heat stress (HS) negatively affects the productive performance, meat yield, egg yield, meat quality (visual appearance and chemical characteristics), egg quality (internal and external), reproductive performance, intestinal functions and immune response. In addition, there is increased awareness among consumers of the quality of food and the industry must aim to satisfy the higher requirements of consumers. Thus, there is increased pressure on poultry producers to improve their production quantity and quality. As a consequence, it is important to know how HS affects the meat quality, egg quality, immune organs, intestinal functions and reproductive organs in order to protect against any negative effects. In addition, it is essential to determine the roles of nutritional factors and the possibility of using them to overcome the negative effects of HS. This review summarizes current research in these areas. |
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O.M. El-Husseiny
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A.Z.M. Soliman
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H.M.R. El-Sherif
and
A.M. Fouad
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Objective: The study was designed to investigate the impact of selected essential micronutrients, vitamin A, zinc (Zn) and copper (Cu), on productive and reproductive performance of broiler breeders from 53-72 weeks of age. Materials and Methods: Total number of 96 broiler breeders (72 ♀ and 24 ♂) at 53 weeks of age, were randomly assigned to 8 equal groups of 9 hens each, divided into 3 replicate. The experiment was conducted in a 2×2×2 factorial arrangement of the dietary treatments. Eight experimental diets were formulated using two levels of vitamin A (12500 and 25000 IU kg–1), two levels of Zn (132 and 264 mg kg–1) and two levels of Cu (15.7 and 31.4 mg kg–1) in this study. Results: The diet containing 12500 vitamin A IU kg–1+264 Zn mg kg–1+15.7 Cu mg kg–1 resulted in the best productive (egg production, egg mass and feed conversion ratio) and reproductive performance (fertility, hatchability and day-old chick weight). The optimal level of vitamin A, Zn and Cu resulted 12500 vitamin A IU kg–1, 264 Zn mg kg–1 and 15.7 Cu mg kg–1, respectively. Conclusion: Feeding diet containing 12500 vitamin A IU kg–1, 264 Zn mg kg–1 and 15.7 Cu mg kg–1 would produce best productive and reproductive performances of Cairo B-2 broiler breeders. |
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A.M. Fouad
,
Y. Li
,
W. Chen
,
D. Ruan
,
S. Wang
,
W.G. Xie
,
Y.C. Lin
and
C.T. Zheng
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This study was designed to investigate the influences of dietary copper (Cu) on laying performance,
egg quality, plasma total cholesterol (TC), high-density lipoprotein cholesterol (HDLC) and low density
lipoprotein-cholesterol (LDLC) concentrations in Shanma laying ducks. A total of 504 egg laying ducks aged 17
week were randomly allotted to seven groups (twelve ducks per replicate and six replicates each treatment). The
control group was fed a corn-soybean meal diet, whereas the treatment groups were fed corn-soybean meal
diets supplemented with 4, 8, 12, 16, 20, or 24 mg Cu-sulfate/kg. Egg production, egg weight, egg mass, feed
conversion ratio, broken egg rate, abnormal egg rate, Haugh unit, yolk color, albumen height, eggshell weight,
eggshell percent, eggshell breaking strength, eggshell thickness, plasma TC, HDLC and LDLC concentrations
did not appear response to dietary Cu levels. Our results indicated that corn-soybean meal diet containing
sufficient amount of Cu for laying performance and egg quality in laying ducks under the conditions of current
experiment. Also, laying performance, plasma TC, HDLC, LDLC concentrations and egg quality were not
sensitive traits to low levels of Cu. |
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