jamal mahmoudi; sara mirzaie goudarzi; Abbas Frahavar; Ali asghar Saki; Ali reza Nourian
Volume 21, Issue 3 , September 2019, , Pages 371-380
Abstract
The effect of essential oils blend, probiotic and flavomycin on performance, gastrointestinal tract (GIT) characteristics, cecal microbial population and blood parameters was studied with 288 day-old chickens, Ross 308 broilers from 1 to 42 days of age in a completely randomized design by 4 ...
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The effect of essential oils blend, probiotic and flavomycin on performance, gastrointestinal tract (GIT) characteristics, cecal microbial population and blood parameters was studied with 288 day-old chickens, Ross 308 broilers from 1 to 42 days of age in a completely randomized design by 4 treatments, 4 replicates and 18 chickens in each replication. The experimental treatments were: 1) basal diet as control group (without additive), 2) basal diet + 150 mg/kg essential oils blend, 3) basal diet + 200 mg/kg Gallipro® probiotic, and 4) basal diet + 150 mg/kg flavomycin. The results showed that feed intake was lower in the control group than other treatments (P<0.05). In the whole trial period, the weight gain of chickens fed with the diet containing flavomycin was higher than other birds and had a better feed conversion ratio than control birds or fed with the diet contains probiotic (P<0.05). The effect of treatments was not significant on relative weight of internal organs, pH of the GIT digesta and Lactobacillus and Escherichia coli population in the ceca. The relative weight of the breast was greater in chickens fed with flavomycin than control group or birds that received essential oils blend (P<0.05). There was no difference between treatments in terms of plasma cholesterol, glucose and triglyceride concentrations, but HDL concentration was lower in the plasma of birds receiving flavomycin compared to other treatments (P<0.05). Based on the results of this study, adding essential oils blend to the diet improved performance and can be used as a growth promoter instead of flavomycin in broilers diet.
Vajiheh Nikoofard; Akbar Yaghobfar; Shahab Ghazi Harsini; Ali Asghar Saki
Volume 20, Issue 3 , November 2018, , Pages 463-476
Abstract
The effect of diet with different protein quality andsupplemented with crystalline amino acids on performance, immune response, enzyme activity in the intestinal tissue and litter characteristics, using 576 Ross 308 (mixed sex) broiler chickens,in a 2 × 4 factorial experiment with two experimental ...
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The effect of diet with different protein quality andsupplemented with crystalline amino acids on performance, immune response, enzyme activity in the intestinal tissue and litter characteristics, using 576 Ross 308 (mixed sex) broiler chickens,in a 2 × 4 factorial experiment with two experimental diets (high and low protein quality) and four levels of crystalline amino acids (recommended levels, without supplemented crystalline amino acids, 10 and 15% higher than the recommended levels)in a completely randomized design with eight treatments, six replicates and 12 chicks per replicate was investigated.The results of this study showed that, adding crystalline amino acids at levels of 10 and 15% higher than the recommended level to diets containing canola meal and wheat (as low quality protein source) caused an increase in performance (P<0.0001), the number of heterophile and heterophile to lymphocyte ratio (P<0.001) and decreased the number of lymphocyte (P<0.01). The treatments with crystalline amino acids hadn’t significant effect on the enzyme activity aminopeptidase and specific activity of the enzyme in jejunum. Also, adding crystalline amino acids at levels of 10 and 15% higher than the recommended level ina low-quality diet were not significantly affected dry matter, nitrogen and ammonia nitrogen in the litter. According to these results, the use ofcrystalline amino acids higher than the recommended levels in the diets with high quality (as maize-soybean meal) has no effect on the performance of broiler chickens and is not recommended.
sevda jangi aghdam; sara mirzaie goudarzi; ali asghar saki; pouya zamani
Volume 19, Issue 2 , August 2017, , Pages 389-401
Abstract
The effect of different sources of insoluble fiber on performance, gastrointestinal tract (GIT) traits and cecal microbial population was studied with 320 day-old chickens, Ross 308 broilers from 1 to 24 days of age in a completely randomized design by 4 treatments, 4 replicates, and 20 chickens ...
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The effect of different sources of insoluble fiber on performance, gastrointestinal tract (GIT) traits and cecal microbial population was studied with 320 day-old chickens, Ross 308 broilers from 1 to 24 days of age in a completely randomized design by 4 treatments, 4 replicates, and 20 chickens in each replication. Experimental treatments including: control (corn-soybean meal)which was diluted by 3% of treated wheat straw, sunflower and soy hulls. Feed intake was not affected by treatments from 1 to 24 days of age. Body weight gain increasedin treated wheat straw group relative to soy hull group. In addition, feed conversion was improved in broiler fedding by treated wheat straw compared to sunflower and soy hulls (P<0.05) but its difference with control treatment was not significant. Weight of the GIT organs and gizzard characteristics was not affected by treatments at 24 days of age. Insoluble fiber sources increased lactic acid bacteria (P<0.05) and decreased Escherichia coli in the ceca realtive to control diet. Based on current results, diet dilution with 3% insoluble fiber did not have negative effect on growth performance but improved beneficial ceca microflora in broiler chickens.