Animal and poultry nutrition
Fatemeh Asgharzadeh; Nazar Afzali; Seyed Homayoun Farhangfar; M. A. Karimi Torshizi
Abstract
In this research, the effect of zinc and selenium synthesized from nano-mineralized probiotics was investigated on yield characteristics, egg quality characteristics, antioxidant status, and immune response of laying hens. A number of 576 high-line laying hens at the peak of production (from 25 to 37 ...
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In this research, the effect of zinc and selenium synthesized from nano-mineralized probiotics was investigated on yield characteristics, egg quality characteristics, antioxidant status, and immune response of laying hens. A number of 576 high-line laying hens at the peak of production (from 25 to 37 weeks of age in three four-week periods) were used as a completely randomized design with a 3x3 factorial experiment with eight replications and eight birds per replication. Experimental treatments are 1. The control diet (without selenium and zinc), 2. Control diet + selenium chelate, 3. Control diet + zinc chelate, 4. Control diet + zinc synthesized from probiotics, 5. Control diet + selenium synthesized from probiotics, 6. Control diet + zinc chelate + selenium chelate, 7. Diet Control + zinc chelate + selenium synthesized from probiotic, 8. Control diet + zinc synthesized from probiotic + selenium chelate, 9. Control diet + zinc synthesized from probiotic + selenium synthesized from probiotic. The results showed that using zinc and selenium synthesized from probiotics increased production percentage, average egg weight, and improved feed conversion ratio (P<0.05). The serum concentration of cholesterol, triglyceride and malondialdehyde in chickens receiving probiotic zinc and selenium was the lowest. The serum HDL concentration and total antioxidant index were the highest compared to other treatments (P<0.05). In general conclusion, zinc and selenium synthesized from nano-mineralized probiotics have a better performance in laying hens.
Animal and poultry genetics and breeding
Mahtab Azizi; Hossein Naeemipour; Seyed Homayoun Farhangfar; Moslem Bashtani
Abstract
In order to compare the performance of neural network with some mathematical functions for predicting of lactation curve of Iranian Holstein dairy cows, a total of 1,085,525 milk test day records from first-parity dairy cows calved during 1983-2012 were used. Fitting the lactation curve was performed ...
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In order to compare the performance of neural network with some mathematical functions for predicting of lactation curve of Iranian Holstein dairy cows, a total of 1,085,525 milk test day records from first-parity dairy cows calved during 1983-2012 were used. Fitting the lactation curve was performed by brnn package (for neural network) and also by some mathematical functions (including Wood, Wilmink, Ali-Schaeffer and Pollott-Gootwine) using R software based upon average milk yield, fat and protein percentage test day records. The criteria of AIC, BIC, RMSE and adjusted R2 were utilized to evaluate goodness of fit. The results showed that the Bayesian neural network (brnn) had a better fit than mathematical functions in describing the standard curve shape of Iranian Holstein dairy cows. Among the mathematical functions used for milk yield, Wilmink model had a better fit while for milk fat percentage and milk protein percentage, Ali-Schaeffer model showed a better fit performance. Therefore, it could be suggested that brnn is an appropriate option to be applied to fit the lactation curve of Iranian Holstein dairy cows.
Animal and poultry nutrition
Navid Ghavipanje; Mohammad Hasan Fathi Nasri; Mojtaba Afshin; Seyyed Ahmad Hosseini; Seyyed Homayoun Farhangfar
Abstract
The worldwide population growth leads to an increase in livestock production that along with the challenges caused by climate change and water scarcity highlights the importance of raising resistance livestock such as camels. The present study aimed to investigate the effect of partial and total replacement ...
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The worldwide population growth leads to an increase in livestock production that along with the challenges caused by climate change and water scarcity highlights the importance of raising resistance livestock such as camels. The present study aimed to investigate the effect of partial and total replacement of dietary alfalfa with camelthorn. Total 18 fattening Sandi growing dromedary camels (9 to 10 months old with an average initial weight of 115±7.7 kg) were randomly assigned to one of three experimental treatments in a completely randomized design, with 6 replicates for each treatment. Experimental diets included: 1- control diet (without camelthorn), 2- diets containing 25% camelthorn, and 3- diets containing 50% camelthorn (dry matter basis). The feed intake was recorded daily and the animals were weighed monthly (on days 0, 30, 60, 90, and 150 of the experiment). The results showed that dry matter intake was increased with increasing camelthorn inclusion in the diet (P ≤ 0.05). Although, the average daily gain was reduced in the diet containing 50% DM camelthorn (P ≤ 0.05), but no significant difference was observed between the treatment containing 25% DM camelthorn and control. Feed cost per kilogram weight gain and profit per kilogram of weight gain tended to increase (P = 0.01) with increasing the inclusion of camelthorn in the diet. Overall, the findings of this study showed that feeding camels with camelthorn up to 50% of dietary DM, not only did not have severe deleterious effects on growth performance, but also reduced the production costs.
setareh Abedi; Seyyed Javad Hosseini-vashan; Seyed Homayoun Farhangfar; seyyed ehsan ghiasi
Abstract
This study was done to investigate the effect of pomegranate peel extract on growth performance, blood biochemical indices, intestinal morphology and meat quality of broiler fed diet-contained soybean oil. 120 male broilers were used in the form of a completely randomized design with 3 treatments, 4 ...
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This study was done to investigate the effect of pomegranate peel extract on growth performance, blood biochemical indices, intestinal morphology and meat quality of broiler fed diet-contained soybean oil. 120 male broilers were used in the form of a completely randomized design with 3 treatments, 4 repetitions and 10 chicks. Experimental diets were three levels of zero, 300 and 600 mg/kg of pomegranate peel extract (PPE). Pomegranate peel extract had no effect on performance traits including feed intake, body weight and feed conversion ratio at starter and finisher phases, but in the grower period, the levels of 300 and 600 PPE reduced feed intake (from 928 to 777 g) and feed conversion ratio (from 1.77 to 1.31; P <0.05) compare to control. The breast percentage increased from 19.78 in control to 21.95 at the level of 600 PPE and the percentage of abdominal fat decreased from 1.93 in control to 1.27 at the level of 600 PPE (P <0.05). The PPE at levels of 600 reduced concentration of cholesterol (183.68 to 137.15 mg/dl) and LDL (95.63 to 32.93 mg/dl) and the enzyme activity of aspartate dehydrogenase (263.8 to 204.28) compare to control. The villus height (from 1026.88 to 1155.12) and the villus height to crypt depth ratio (5.04 to 5.6) were higher at the 600 PPE compared to the control. The concentration of Malondialdehyde in meat decreased at 15 and 30 days after slaughter with an increase in PPE compared to control.
