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| Articles
by
Y. Ebrahim Nezhad |
Total Records (
3 ) for
Y. Ebrahim Nezhad |
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Y. Ebrahim Nezhad
,
N. Maheri Sis
,
H. Aghdam Shahryar
,
M.R Dastouri
,
A. Aghajanzadeh Golshani
,
A Tahvildarzadeh
and
K.A Najafyan
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In this study, the citric acid and microbial phytase
combination effect on the egg quality characteristics in commercial laying
hens of Hy-line (W-36) strain in 53-64 week of age is studied. One hundred
and ninety two of laying hens were tested. The experimental design was
completely randomized design with a 3H2 factorial arrangement with three
levels (0, 2 and 4%) of citric acid and two levels (0.0 and 300 FTU kg-1)
of microbial phytase in low available phosphorus diets with 6 treatments,
4 replicates and 8 hens in each replicate. The measurements were specific
gravity, eggshell thickness, Hough unit, eggshell weight and eggshell
ash. The results showed that interaction of citric acid and phytase had
significant (p<0.05) effect on specific gravity, eggshell thickness
and eggshell weight. Adding of 4% citric acid to low available phosphorus
diets decreased the Hough unit and eggshell ash in comparison with other
groups, significantly (p<0.05). 300 unit kg-1 phytase addition
in low available phosphorus diets, decreased the Hough unit, significantly
(p<0.05). Also, phytase addition in low available phosphorus diets,
was increased eggshell ash, significantly (p<0.05). |
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Y. Ebrahim Nezhad
,
M. Shivazad
,
R. Taherkhani
and
K. Nazeradl
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A synergistic effect between Citric Acid (CA) and Microbial Phytase (MP) in improving phytate Phosphorus (P) utilization have been reported in broiler previously. In order to evaluate such additive effect in laying hen, an experiment was conducted using 224 Hyline-W 36 laying hen. Experiment began at 53 w of age and lasted in 64 w of age. The experiment was carried out using a completely randomized design with factorial arrangement (0 and 300 IU MP and 0, 20 and 40 g citric acid per kg of diet). Four replicate of 8 hens per each were fed dietary treatments including 1) Positive Control diet (PC) which meet NRC recommended available P level (0.3% available P), 2) Negative Control diet (NC) that was similar to PC diet except that available P was reduced by 0.2 %, 3) NC+300 IU microbial phytase per kg of diet, 4) NC+20 g CA per kg of diet, 5) NC+20 g CA+300 IU microbial Phytase per kg of diet, 6) NC+40 g CA per kg of diet, 7) NC+40 g CA+300 IU microbial Phytase per kg of diet. Dietary supplementation of MP to low available P diets significantly improved egg production and restored it to the level similar to PC group, but CA supplemented diets failed to create such effects. NC and diets with only CA supplementation had significantly lower feed intake compared to PC and MP supplemented diets. MP supplemented diets were used as efficiently as the PC diet, but CA had any effects on feed efficiency. Results obtained in our study suggests that contrary to the effects of CA in broiler chicks, CA couldn=t enhance phytase effectiveness in laying hen, probably due to high levels of Ca in laying hens diets. |
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M. Fathi
,
K. Nazer Adl
,
Y. Ebrahim Nezhad
,
H. Aghdam Shahryar
and
M. Daneshyar
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An experiment with 320, 1 day male broilers (Ross 308) was
performed to evaluate the effects of Arginine (Arg) and Vitamin E (VE) supplementation
on antioxidant status, some biochemical parameters and ascites mortality in
broiler chickens with cold temperature induced Pulmonary Hypertension Syndrome
(PHS). The chickens were distributed between 16 pens of 20 each and each four
allocated to each of experimental treatments. Treatment 1: was the birds fed
a commercial corn-soybean meal based diet (control), Treatment 2: the birds
fed the control diet supplemented with 400 IU VE kg-1 of feed
(VE), Treatment 3: the birds fed the control diet supplemnetd with 0.3% Arg
in drinking water (Arg) and Treatment 4: the birds fed the control diet supplemented
with 400 IU VE and 0.3% Arg (Arg-VE). At day 14, temperature was reduced to
amplify the incidence of Pulmonary Hypertension. Hematological and oxidants
status parameters (in serum and liver) were determined at day 21 and 42 of age.
Right/Total Ventricular weight ratio (RV/TV) was recorded at the end of the
experiment (week 6). The results of experiment showed that Arg birds at day
42 had the lower (p≤0.05) RV/TV ratio and ascites mortality yet had improved
growth performance parameters. Red Blood Cell (RBC), Hematocrit (Hct) and Hemoglobin
(Hgb) was significantly lower in Arg and Arg-VE birds as compared to other birds
at day 42 of age. Plasma Malondialdehyde (MDA) wae significantly lower in Arg
and Arg-VE birds as compared to other birds at 42. Plasma Glutathione Peroxidase
(GPX) activity was greater (p≤0.05) in both the Arg and Arg-VE birds as
compared to other groups at day 42. Plasma and liver Superoxide Dismutase (SOD)
activity was not affected by none of the Arg or VE supplementation. In summary
level of Arg but not for VE used in this experiment, synchronic, some change
effects on MDA and TAS in plasma or hematological parameters had positive effects
on cardio pulmonary performance, growth performance and ascites mortality in
broiler encounter with low temperature and PHS. |
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