D Shafieipour fard1; Somayeh Salari; Mohsen Sari; Saman Abdanan Mehdizadeh; Mehdi Zarei
Volume 18, Issue 3 , October 2016, , Pages 539-552
Abstract
This experiment was conducted to evaluate the effect of different lipid sources and organic zinc supplementation on performance, egg bacterial activity and ovary morphology of laying hens for 10 weeks. with 288 sixty weeks old birds by employing a completely randomized design with factorial arrangement ...
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This experiment was conducted to evaluate the effect of different lipid sources and organic zinc supplementation on performance, egg bacterial activity and ovary morphology of laying hens for 10 weeks. with 288 sixty weeks old birds by employing a completely randomized design with factorial arrangement of 3×4 with 12 treatments, 4 replicates and 6 hens each. The factors of interest were 4% lipid from different sources (soybean oil, fish oil and tallow) and various levels of zinc (40, 100, 200 and 300 mg/kg of diet). In all three lipid sources, significant reduction (P<0.05) was observed in feed intake when the level of zinc supplementation increased. Haugh unit was significantly (P<0.05) increased in diets containing different lipid sources as the level of zinc supplementation increased. The highest Haugh unit value was observed at the level of 100 mg/kg of zinc supplementation with soybean oil and fish oil. Increasing levels of zinc supplementation significantly (P<0.05) improved eggshell thichness, eggshell strength and eggshell percentage. The number of large white follicles linearly increased in diets containing tallow, when the level of zinc supplementation increased. The egg yolk microbial load was significantly (P<0.05) decreased by different lipid sources as the level of zinc supplementation increased. According to the results, it seems that the addition of zinc to the diets containing different lipid sources could not affected performance parameters but decreased egg yolk microbial load.
Elahe Rezaei; Saleh Tabatabaei Vakili; Khalil Mirzadeh; Somayeh Sallary; Mehdi Zarei
Volume 18, Issue 1 , April 2016, , Pages 151-160
Abstract
This study was carried out to evaluate the effect of different levels of anise seed on the performance, immune system, antioxidant activity and blood estrogen level of broiler chicks. A total of 192 day -old Ross 308 broilers were trained for 42 days in a completely randomized design with four treatments, ...
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This study was carried out to evaluate the effect of different levels of anise seed on the performance, immune system, antioxidant activity and blood estrogen level of broiler chicks. A total of 192 day -old Ross 308 broilers were trained for 42 days in a completely randomized design with four treatments, four replicates and 12 birds per each replicate. Treatments were included the levels of zero (control(, 0.3, 0.6 and 0.9 percent of anise seed in diet. SRBC was injected at day 28 and blood samples were collected from chickens at days 35 and 42 of rearing. Dietary anise supplementation had no positive effect on feed intake and weight gain of broilers. In starter period, the chicks fed by 0.3 percent of anise seed, had the least feed conversion ratio (P<0.05). However, anise seed levels had no positive effects on feed conversion ratio in grower and total rearing period. Anise seed caused the higher antibody titer against SRBC in day 35 of rearing (P<0.05). The cellular immunity did not improve by anise seed levels in broilers. The 0.3 percent of anise seed, caused the higher total antioxidant capacity of blood plasma than control chicks (P<0.05). The blood serum estrogen level was reduced in 0.3 and 0.6 percent, but increased in 0.9 percent of anise seed (P<0.05). Generally, however the anise seed dose not improves performance traits and cellular immunity of broilers, but increse the primary humeral immunity and total antioxidant capacity of chicken.
Parvin Saeedi; Saleh Tabatabaei; Somayeh Sallary; Khalil Mirzadeh; Mehdi Zarei
Volume 16, Issue 2 , October 2015, , Pages 157-166
Abstract
In order to evaluation the effect of Nigella Sativa supplementation on performance, immune response and some of blood parameters, a total of 192 one day old Ross 308 broilers were used in a completely randomize design with four treatments, four replicates and 12 observations in each replicate. Treatments ...
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In order to evaluation the effect of Nigella Sativa supplementation on performance, immune response and some of blood parameters, a total of 192 one day old Ross 308 broilers were used in a completely randomize design with four treatments, four replicates and 12 observations in each replicate. Treatments included the increasing levels of zero (control), 0.4, 0.8 and 1.2 percent Nigella sativa. In grower and whole period of experiment, the weight of birds received 0.4 and 0.8 percent of Nigella sativa was higher than control group birds (P<0.05). The supplementation of Nigella sativa in diet has not effect on feed intake and feed conversion ratio in starter, grower and total rearing periods. The weights of bursa and thymus in birds received 0.4 and 0.8 percent of Nigella sativa werehigher than control group birds (P<0.05). The weight of liver in birds belong to 0.4 percent of Nigella sativawas higher than control group (P<0.05). Addition of Nigella sativa in dietreduced the glucose, triglyceride, cholesterol, LDL and increased the HDL in blood serum. The use of Nigella sativa in dietary of birds caused the higher total white blood cells and lower heterophil: lymphocyte ratio. The birds which received 0.4 and 0.8 percent of Nigella sativa had the higher total antioxidant capacity than control group in blood plasma. In conclusion, the use of Nigella sativa up to 0.8 percent in diet, in addition to improvement the performance, increased the immune system activity and total antioxidant capacity in Ross 308 broiler chickens.