Ali Nobakht Articles List

List of Articles Ali Nobakht

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1 - Effect of Probiotic (Protexin) on performance, blood biochemical parameters and egg quality in laying hens
Ali Reza Safamehr Ali Nobakht

The effect of probiotic on egg production, egg quality, yolk cholesterol, triglyceride and blood biochemical parameters of layer hens was studied. Experiment was carried out with 256 bird and each sixteen bird were considered as a replicate that were randomly allotted t More

The effect of probiotic on egg production, egg quality, yolk cholesterol, triglyceride and blood biochemical parameters of layer hens was studied. Experiment was carried out with 256 bird and each sixteen bird were considered as a replicate that were randomly allotted to basal with Probiotic supplementation at rates of 25, 50 and 75 mg/ kg diets. Treatments were arranged in a completely randomized design. The Probiotic used in the study was a commercial preparation (Protexin) with 3× 109 spore g-1 of the product. Egg production, egg weight, feed intake, feed conversion ratio and egg mass were not influenced by Probiotic, as well as Haug unit, specific gravity, egg shell weight, egg shell thickness and shell weight/ surface area. Experimental groups had not statistical differences in biochemical parameters such as albumin, total protein, phosphorus, calcium, cholesterol, triglyceride and glucose amounts. Probiotic had not also any effect on egg yolk cholesterol and triglyceride. It was concluded that dietary Probiotic supplementation up to 75 mg/kg of diet had not beneficial effects on the performance and egg quality of laying hens. Manuscript profile
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2 - The effects of dietary electrolyte balance on performance and eggshell quality of laying hens exposed to heat stress and thermo neutral condition in early laying period.
Ali Nobakht Mahmoud Shivazad Mohammad Chamani Ali Reza Safamehr

 This study was conducted to evaluate the effects of different dietary electrolyte balance on performance and egg quality in early period of egg production under heat stress and thermo neutral condition. This experiment was done on hens that were in early of egg pr More

 This study was conducted to evaluate the effects of different dietary electrolyte balance on performance and egg quality in early period of egg production under heat stress and thermo neutral condition. This experiment was done on hens that were in early of egg production period. Number of 256 Hy- line W-36 laying hens from 24 to 34 weeks of age were placed in two separated experimental room under heat stress and thermo neutral condition. Each experiment was carried out in a completely randomized design. Diets were formulated with inclusions of NaCl, NaHCO3, KHCO3 and NH4Cl to give different dietary electrolyte balances (DEB) as 0, 120, 240 and 360 mEq/kg and were fed to laying hens for 10 weeks. Results of these experiments showed that performance of laying hens were not significantly affected by diets of various DEB in both heat stress and thermo neutral conditions. Eggshell quality were significantly affected by DEB (p<0.05). Under heat stress, eggshell weight and egg weight/surfaces and under thermo neutral condition, egg specific gravity, eggshell weight, eggshell thickness, eggshell ash and egg weight/surfaces were significantly affected by DEB and improved by increasing dietary electrolyte balance from 120 to 360 mEq/kg in many cases. In conclusion, increasing DEB to 360 mEq/kg in early period of egg production in heat stress and thermo neutral condition can improve eggshell quality. Manuscript profile
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3 - The effect of different levels of rice bran on performance of laying hens
Ali Nobakht Ali Reza Safamehr Yousef Mihmannavaz

 This study was conducted to evaluate the effect of different levels of rice bran on performance of laying hens. Experiment was done on two hundred and fifty six laying hens in a completely randomized design with four treatments and four replications during 8 weeks More

 This study was conducted to evaluate the effect of different levels of rice bran on performance of laying hens. Experiment was done on two hundred and fifty six laying hens in a completely randomized design with four treatments and four replications during 8 weeks. Egg production mean and egg weight were weighted daily. Egg mass production and used diet weight were also weighted weekly. Treatments were the levels of rice bran Inclusion including, 0, 5, 7.5 and 10 percent. Result showed that performance of laying hens was not significantly affected by inclusion of rice bran up to 7.5 percent, whereas egg production, egg mass and feed conversion were negatively affected by 10 percent of rice bran. Egg quality was not significantly affected by inclusion of different levels of rice bran in laying hens diet. It was concluded that, rice bran can be used as an alternative feedstuff in diet at inclusion levels up to 7.5 percent without negative effect on laying hens performance and egg quality. Manuscript profile
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4 - Evaluation of the effects of different nutrient levels on performance of laying hens
Ali Nobakht yosef Mehmannavaz saman Mahdavy

This study was conducted to evaluate the effects of different nutrient levels on performance of laying hens. This experiment was conducted with 320 laying hens from 32 to 42 weeks in a completely randomized design with five treatments and four replicates with 16 birds i More

This study was conducted to evaluate the effects of different nutrient levels on performance of laying hens. This experiment was conducted with 320 laying hens from 32 to 42 weeks in a completely randomized design with five treatments and four replicates with 16 birds in each replicate. Experimental diets were isocaloric and included: diet nutrients recommended by Hy-line company for commercial laying hens (control), diet with 10 percent lower nutrient level than nutrient recommended by Hy-line company, nutrients recommended by NRC (1994), diet 10 percent higher nutrient level of nutrient recommended by NRC (1994) and diet with average energy of nutrients recommended by Hy-line company and NRC (1994). The results of this experiment showed that the performance and egg traits in laying hens were significantly affected by different experimental diets and the egg weight was significantly different between treatments (P<0.05). The highest amount of egg weight (60.35 g) was observed in control group. Also significantly differences were observed in egg mass between treatments (P<0.05). The highest amount of egg mass (53.72 g) was observed in control group, whereas nutrients recommended by NRC (1994) caused the lowest amount of that (49.84 g). Moreover, feed efficiency significantly affected by studied nutrients (P<0.05). The best amount of feed efficiency (2.13) was observed in control group. There was also significant difference between treatments for egg shell weight and the highest egg shell weight (6.07g) was observed in control group. The egg shell thickness was significantly affected by treatments, too (P<0.05) and the lowest egg shell thickness (304mm) was observed in control group. There was not any significantly difference between treatments in other traits such as feed price to produce one kilogram of egg (P>0.05). It can be concluded that performance and egg quality of laying hens can be improved by using nutrients levels recommended by Hy- line company for commercial laying hens. Manuscript profile

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List of Articles Ali Nobakht