Y. Manzari; Mozhgan Mazhari; O. A. Esmaeili; A. Moosaee
Abstract
In this experiment, 160 one day old male broilers were used to compare the effect of weekly changing of metabolizable energy (ME) and protein (CP) levels with NRC and Ross feeding system on growth performance, carcass characteristics and blood metabolites of broilers. Experiment was done in a completely ...
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In this experiment, 160 one day old male broilers were used to compare the effect of weekly changing of metabolizable energy (ME) and protein (CP) levels with NRC and Ross feeding system on growth performance, carcass characteristics and blood metabolites of broilers. Experiment was done in a completely randomized design with 4 treatment and 4 replicates (10 birds each). There were four experimental treatments including: T1: diets formulated based on NRC recommendation, T2: diets formulated based on Ross recommendation T3: phase feeding 1 and T4: phase feeding 2. The results showed that lowering ME and CP level did not have any adverse effect on broiler performance till 14 days of age. In grower, finisher and whole period, significant effect of treatments was seen on performance traits (P<0.05). Cost calculations showed that the most food cost was seen for NRC diets and the lowest cost was for phase feeding 2 diet. The best weight gain and feed conversion ratio was observed in birds feeding by Ross diet and after that NRC diet and T3. Effect of treatments on the relative weight of breast, abdominal fat and spleen was significant (P<0.05). Effect of treatment on blood metabolites including glucose, cholesterol and blood cells was not significant but heterophil to lymphocyte ratio was differed significantly (P<0.05) as it was higher in birds with weekly changing of diets.
M. Molaeinejad; Omidali Esmaeilipour; R. Mir Mahmoudi; M. Mazhari
Abstract
This study was conducted to investigate the effects of origanum vulgare and cinnamom zelanicum powder on performance and some blood parameters of heat stressed broiler chickens .A total of 200, 1-day-old male broiler chickens (Ross 308) were randomly allocated to 5 treatments with 4 replicates and 10 ...
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This study was conducted to investigate the effects of origanum vulgare and cinnamom zelanicum powder on performance and some blood parameters of heat stressed broiler chickens .A total of 200, 1-day-old male broiler chickens (Ross 308) were randomly allocated to 5 treatments with 4 replicates and 10 chicks each, as a completely randomized design. The dietary treatments consisted of: basal diet (BD), BD + 0.25% origanum vulgae, BD + 0.5% origanum vulgar, BD + 0.25% cinnamom zelanicum and BD + 0.5% cinnamom zelanicum . The experiment was conducted from 25 to 42 day of age, before that, all the birds were fed the basal diet. The birds were kept at 34°C±2 (9.00 to 17.00 h) from 25 to 42 day of age. The results indicated that dietary supplementation with origanum vulgare and cinnamom zelanicum did not affect feed intake (FI). Dietary supplementation with origanum vulgare and cinnamom zelanicum increased BWG and decreased FCR compared to basal diet (P<0.01). The highest BWG and the lowest FCR were observed in the birds supplemented with 0.5% origanum vulgare, 0.25% and 0.5% cinnamom zelanicum respectively. Inclusion of 0.5% cinnamom zelanicum to the diet decreased heterophyl to lymphocyte ratio by 10% compared to the control (P<0.05). Inclusion 0.5% of origanum vulgare powder to the diet increased glutathione peroxidase enzyme activity by 74% compared to the control group (P<0.05). In conclusion, diet supplementation with 0.5% origanum vulgare and cinnamom zelanicum powder could improve performance and immune response and somehow suppressed the negative effects of heat stress.
Hamid Jahani; Mozhgan Mazhari; Nemat Ziaiee; Rouhollah Mirmahmoudi
Abstract
This experiment was conducted to investigate the effects of dietary dianthus extract, virginiamycin and Protexin probiotic on the growth performance, blood metabolites, microbial community and small intestine histopathology of male broilers from 1 to 42 days of age. A total of 240 Ross male broilers ...
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This experiment was conducted to investigate the effects of dietary dianthus extract, virginiamycin and Protexin probiotic on the growth performance, blood metabolites, microbial community and small intestine histopathology of male broilers from 1 to 42 days of age. A total of 240 Ross male broilers were randomly distributed to 40 experimental units and 6 dietary treatments (4 replicates with 10 birds in each).Treatments were included control (basal diet), basal diet+Virginiamycin antibiotic, basal diet+ Protexin probiotic, basal diet + 100 mg dianthus extract, basal diet + 300 mg dianthus extract and basal diet + 450 mg dianthus extract per kg of diet.The result showed that the average body weight gain of broilers fed with Virginiamycin, Protexin,150 and 300 mg dianthus extract was significantly more and feed conversion ratio was less than control group in all periods (P<0.05). The relative weights of carcass, breast and leg were improved by all treatments except for 450 mg dianthus extract. The relative weights of liver, Bursa and spleen were increased by all treatments. The serum concentration of cholesterol and LDL were decreased by Protexin and all levels of dianthus extract. All treatments increased Lactobacillus bacteria and decreased Escherichia coli bacteria except Virginiamycin treatment. Villus height and width increased and crypt depth decreased by all supplementation. All treatment groups increased blood lymphocyte, decreased heterophile and improved heterophile to lymphocyte ratio. Based on these results, Protexin and dianthus extract up to 300 mg/kg of diet may be good replacement for antibiotic to improve broiler performance and immunity.
