Behrouz Dastar; mohsen rajabzadeh nesvan; Mahmoud Shams Shargh; Mokhtar Mohajer
Volume 18, Issue 3 , October 2016, , Pages 553-562
Abstract
The effect of feeding different protein profiles on growth performance, carcass components and nitrogen content of litter in Cobb 500 broiler strain was evaluated using 800 chicks in a completely randomized design with four treatments, five replicates groups of 40 birds per each treatment. The treatments ...
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The effect of feeding different protein profiles on growth performance, carcass components and nitrogen content of litter in Cobb 500 broiler strain was evaluated using 800 chicks in a completely randomized design with four treatments, five replicates groups of 40 birds per each treatment. The treatments were consisted of four protein feeding profiles (based on Cobb strain nutrition guide, recommendation by NRC, 90% protein recommended by NRC and phase feeding). The effect of different treatments on body weight gain, feed intake, energy consumption, protein efficiency ratio and carcass components were not significant. The birds were fed based on Cobb strain guide had a better feed conversion ratio (P< 0.05). Energy efficiency ratio in broilers fed base on protein profile of Cobb strain guide was higher than other treatments (P< 0.05). The amount of litter nitrogen in broilers fed with base on Cobb strain guide, 90% protein recommended by NRC and phase feeding were lower than those fed base on protein profile of NRC recommendation (P< 0.05). Based on the results of this experiment, the use of protein profile base on Cobb strain is more suitable for feeding Cobb broiler chickens than other profiles.
Mahdi Afra; Bahman Navidshad; Farzad Mirzaei Aghjeh Gheshlagh; Nemat Hedayat Ivarigh
Volume 18, Issue 3 , October 2016, , Pages 563-573
Abstract
This experiment was carried out using 200 Ross 308 broiler chickens in a completely randomized design with 5 treatments and 4 replicates. The true metabolisable energy of the barley hulls were determined using cecectomized roosters.The dry matter, true metabolisable energy, ash, ether extracts, crude ...
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This experiment was carried out using 200 Ross 308 broiler chickens in a completely randomized design with 5 treatments and 4 replicates. The true metabolisable energy of the barley hulls were determined using cecectomized roosters.The dry matter, true metabolisable energy, ash, ether extracts, crude protein, crude fiber, NDF, ADF, Ca and total P content of barely hulls were: 92%, 978 kcal/kg, 3.53%, 4.26%, 12.26%, 12.6%, 52.1%, 23.5%, 0.9% and 0.6%, respectively. The experimental diets were consisted of a control hulls free diet and four diets containing 0.75 or 1.5 percent barley hulls with particle sizes of less than 1 mm or between 1-2 mm. The barley hulls improved weight gain and feed conversion ratio and particularly the diet contained 1.5 percent barley hulls with particle size of 1-2 mm was more effective in this respect (P < 0.05). The same trend was observed in gizzard weight (P < 0.05). Dietary barley hulls improved dry matter, crude protein and ash digestibility (P < 0.05). All the barley hulls contained diets reduced feed cost per kg weight gain of broiler chickens, which could be a surprising finding. The results of the present study suggest that including barley hulls with 1-2 mm particle size at 1.5 percent of the diet could positively affect performance traits and feed cost of broiler chickens.
Nastaran Shahebrahimi; Khalil Mirzadeh; Morteza Mamuei; Ahmad Tatar; Mohammad Hojjati
Volume 18, Issue 2 , June 2016, , Pages 299-310
Abstract
Effect of natural zeolites and nano-zeolite on gut flora, tibia bone characteristics, blood parameters and performance of broilers investigated with 336 male Ross 308 broilers chicks allocated to seven treatments with four replicates and 12 chicks per each. Experimental treatments were control ...
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Effect of natural zeolites and nano-zeolite on gut flora, tibia bone characteristics, blood parameters and performance of broilers investigated with 336 male Ross 308 broilers chicks allocated to seven treatments with four replicates and 12 chicks per each. Experimental treatments were control (no zeolite supplemented), natural zeolite (0.5, 1 and 1.5 percent) and nano-zeolite (0.5, 1 and 1.5 percent). Experimental diets had no significant effect on relative weight of breast, thights, liver, abdominal fat, gizzard and carcass efficiency. Zeolite and nano-zeolite supplementation led to significant decrease of total bacteria and E. Coli population (P<0.05). Experimental additives did not show effect on weight, length, volume and density of fresh and dry tibia. Nano-zeolite inclusion increased phosphorus, ALP and AST amounts compared to control group (P<0.05). It could be concluded that nano-zeolite inclusion in broiler diet, promote gut microflora and increased hepatic enzymes activity.
vahid Jazi; Fathollah Boldaji; Behrouz Dastar; Seyed Reza Hashemi; Amin Ashayerizadeh
Volume 18, Issue 2 , June 2016, , Pages 311-321
Abstract
The effect of feeding fermented cottonseed meal on performance, carcass characteristics and blood serum lipid profile was studied in a completely randomized design with five treatments, five replicates and 12 birds per replication using 300 male Ross 308 broiler chicks. Raw cottonseed meal was fermented ...
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The effect of feeding fermented cottonseed meal on performance, carcass characteristics and blood serum lipid profile was studied in a completely randomized design with five treatments, five replicates and 12 birds per replication using 300 male Ross 308 broiler chicks. Raw cottonseed meal was fermented with a liquid mixed culture containing Bacillus subtilis, Aspergillus niger and Aspergillus oryzae with a ratio of 1:1.2. After seven days of fermentation, free gossypol was reduced from 584.33 to 68 mg/kg. The experimental treatments included replacing 0, 10, and 20 percent of the raw or fermented cottonseed meal by the soybean meal in the diet. The use of fermented cottonseed meal in the diet improved weight gain and feed conversion ratio of broilers compared to the raw cottonseed meal (P<0.05). At 21 and 42 d, weight gain and feed conversion ratio of the birds fed diets containing 10 and 20 percent of fermented cottonseed meal did not have a significant difference with the birds fed by the control diet. Abdominal fat was lower in birds fed diets containing fermented cottonseed meal compared with the others (P<0.05). Serum concentrations of cholesterol and triglyceride were significantly lower for the birds fed by diets containing fermented cottonseed meal, compared with the other groups (P<0.05). Based on the results, the use of fermented cottonseed meal improves the performance and health of broiler chickens compared to the raw cottonseed meal.
Ali Akbar Salari; Ahmad Hassanabadi; Hassan Nassiri Moghaddam; Gholamali Kalidari
Volume 18, Issue 2 , June 2016, , Pages 323-334
Abstract
The aim of this experiment was to study the effects of hydrochloric and butyric acids addition to broiler diets on performance, carcass characteristics, intestinal microbial population and intestinal histology. Two hundred eighty Ross 308 one-day old female broiler chicks were assigned to 7 dietary treatments ...
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The aim of this experiment was to study the effects of hydrochloric and butyric acids addition to broiler diets on performance, carcass characteristics, intestinal microbial population and intestinal histology. Two hundred eighty Ross 308 one-day old female broiler chicks were assigned to 7 dietary treatments and 4 replicates of 10 chicks in a completely randomized design. Experimental treatments consisted of dietary addition of 2 levels of hydrochloric acid (1.5 and 3 percent), 2 levels of butyric acid (0.2 and 0.4 percent) and 2 levels of the acids mixture (1.5 + 0.4 and 3 + 0.2 percent) and a treatment with no acid supplementation as control group. Dietary hydrochloric and butyric acids during grower period decreased average body weight, significantly (P<0.05) in compare to control group. Supplemented acids, decreased feed intake and increased feed conversion ratio in the grower period in compare to control group, significantly (P<0.05). Acid treatments had no significant effect on carcass characteristics, microbial count of ileum and histology of the small intestine of broiler chickens in compare to control group. It could be concluded that using of hydrochloric and butyric acids in broiler diets have no positive effect on growth performance, carcass characteristics and morphology of the small intestine of broiler chickens.
Ali Reza Amouyan Khaveh; Mohammad Amir Karimi Torshizi; Farid Shariatmadari
Volume 18, Issue 1 , April 2016, , Pages 85-94
Abstract
Effect of intermittent mash-pellet feeding programs on broilers performance, ascites susceptibility and economic yield was studied using 480 broilers in six treatments and five replicates of 16 chicks per pen were used in a completely randomized design. Treatments including: 1. Mash feed, 2. Heated-mash ...
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Effect of intermittent mash-pellet feeding programs on broilers performance, ascites susceptibility and economic yield was studied using 480 broilers in six treatments and five replicates of 16 chicks per pen were used in a completely randomized design. Treatments including: 1. Mash feed, 2. Heated-mash feed, 3. Mash feed in starter and grower and pellet feed in finisher, 4. Mash feed in starter and pellet feed in grower and finisher, 5. Pellet feed, 6. Grinded-pellet feed. Pellet feeding increased the feed intake and body weight gain and improved the feed conversion ratio, although the ascites susceptibility increased (P<0.01). Mash feeds decreased the body weight gain and increased the feed conversion ratio (P<0.01). Feeding pellet in finisher resulted in the same feed conversion ratio with feeding pellet for whole period or grower and finisher periods, however feed conversion ratio in pellet fed birds was better than mash fed birds (P<0.01). Feeding pellet for whole period is necessary to obtain maximum feed intake and body weight gain. Feeding mash feed in the first four weeks or whole period reduced the ascites susceptibility (P<0.01). The ascites susceptibility increased by increase in pellet feeding length (P<0.01). Feeding pellet diets reduced the feed cost for a kg live weight production and the increased gross profit compared to mash diets (P<0.05). In order to use the benefits of pellet feed and avoid high mortality rates and ascites susceptibility, it is recommended to start with mash feed and fed pellet in growing and finisher periods.
Mohammad Hossein Palizdar; Mohammadreza Pourelmi; Hamidreza Mohammadian-Tabrizi; Zahra Sepehr
Volume 18, Issue 1 , April 2016, , Pages 95-106
Abstract
Effect of GLOBACID® acidifier in different stocking densities on performance and blood metabolites was examined using 576 one-day broiler chickens Ross 308 in a completely randomized design with 6 treatments and four replications for each treatment through a (3 × 2) factorial arrangement with ...
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Effect of GLOBACID® acidifier in different stocking densities on performance and blood metabolites was examined using 576 one-day broiler chickens Ross 308 in a completely randomized design with 6 treatments and four replications for each treatment through a (3 × 2) factorial arrangement with three levels of stocking densities (14, 16 and 18 chicks per square meter) and two levels of GLOBACID® acidifier (zero and one kg per each ton of feed). The lowest feed intake was seen in 18 stoking density treatment which fed one kg of acidifier in the ration and this treatment was significantly different with other treatments (P<0.05). Feed intake was significantly lower in broilers which received acidifier compared with others that did not receive acidifier (P<0.05). Increasing the density from 14 to 18 birds per square meter increased feed conversion ratio (P<0.01). Birds that received acidifier had lower feed conversion ratio than others (P<0.05). Feeding diets containing acidifier lead to a reduction in glucose and antibody titers against SRBC and an increase in cholesterol and triglyceride in broilers blood plasma (P<0.05). The interaction between stocking densities and acidifier on body weight and blood metabolites was not significant. Therefore, using acidifiers in high stocking densities have some advantageous in broiler performance.
Zahra Amiri Ghanatsaman; Omidali Esmaeilipour; Rouhollah Mirmahmoudi; Mozhgan Mazhari
Volume 18, Issue 1 , April 2016, , Pages 119-128
Abstract
This study was conducted to investigate the effect of Mentha piperita (PP) and Melissa officinalis (MP)powder on performance, apparent digestibility of fat and protein and blood parametersof broiler chicks subjected to heat stress. 200-day-old male Ross broiler chicks were assigned to a completely randomized ...
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This study was conducted to investigate the effect of Mentha piperita (PP) and Melissa officinalis (MP)powder on performance, apparent digestibility of fat and protein and blood parametersof broiler chicks subjected to heat stress. 200-day-old male Ross broiler chicks were assigned to a completely randomized design with five dietary treatments and four replicates. The experimental treatments were: 1. Control group (diet without feed additive), 2. Diet supplemented with 0.5 percent PP, 3. Diet supplemented with 1 percent PP, 4. Diet supplemented with 0.2 percent MP and 5. Group supplemented with 0.4 percent MP. The experimental diets were offered to the chicks from 25 to 42 day of age. During the experiment, the birds were kept at 34°C ± 2 for 8 hours (9.00 to 17.00). The diets supplemented by Mentha piperita and Melissa officinalis powder had not significant effect on feed intake, but higher body weight gain (BWG) and lower feed conversion ratio (FCR) observed in the birds fed diet supplemented with one percent of PP. Apparent digestibility of dry matter and crude fat were not affected by the dietary treatments, but the digestibility of protein was increased (P<0.05) in birds fed on diet supplemented with one percent of PP. Dietaryinclusion of PP and MP had no effect on blood parameters. It could be concluded that addition of PP at the level of one percent of broilers diets during heat stress, improve protein digestibility and growth performance.
Yousef Golmohammadi; Ali Nobakht
Volume 18, Issue 1 , April 2016, , Pages 129-140
Abstract
For determination the effect of lemon pulp levels and organic acid premix (globacid) on performance, carcass traits,immune system, biochemical parameters and intestinal morphology of broilers, 288 Ross broilers were used in 3×2 factorial arrangement with three levels of lemon pulp (0, 1.5 and 3 ...
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For determination the effect of lemon pulp levels and organic acid premix (globacid) on performance, carcass traits,immune system, biochemical parameters and intestinal morphology of broilers, 288 Ross broilers were used in 3×2 factorial arrangement with three levels of lemon pulp (0, 1.5 and 3 percent) and two levels of globacid (0 and 0.1 percent) in a completely randomized design with six treatments, four replicates and 12 birds per each replicate from 10 to 42 days of age. Feeding birds with diets cantaining lemon pulp and organic acid premix increased the amount of weight gain and final live weight (P<0.05). Lemon pulp and organic acid had not effect on carcass traits, whereas the thigh percentage increased in bidrs fed on diet containing lemon pulp (P<0.05). Using three percent lemon pulp and lemon pulp with organic acid premix increased cripts depth of jejenum (P<0.05). Dietary lemon pulp and organic acids had not significant effects on immune level and biochemical parameters. It could be concluded that using lemon pulp up to 3 and 0.1 percent organicof acid improve performance, carcass traits and intestinal morphology of broiler chicks
Farzad Bagherzadeh Kasmani; Samira Omidikia; Hamid Reza Mirzaie; Mehran Mehri
Volume 16, Issue 2 , October 2015, , Pages 103-111
Abstract
This experiment was conducted to evaluate the effects of dietary Salvia mirzayanii supplementation on performance, carcass characteristics, internal organs and cecal microbial population in broilers. A total of 200, one-day-old broiler chicks (Ross 308) were fed five experimental diets containing different ...
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This experiment was conducted to evaluate the effects of dietary Salvia mirzayanii supplementation on performance, carcass characteristics, internal organs and cecal microbial population in broilers. A total of 200, one-day-old broiler chicks (Ross 308) were fed five experimental diets containing different levels of S. mirzayanii (zero, 0.25, 0.50, 0.75 and one percent of diet) until 42 days of age. From 1-21 days of age, birds fed one percent S. mirzayanii) had lower body weight gain and feed intake and higher feed conversion ratio (P<0.05). Regarding 22-42 days of age and whole of experiment (1-42), feed conversion ratio in birds fed diet containing 0.5 percent S. mirzayanii significantly (P<0.05) decreased compared with control group. Relative carcass and breast muscle weights of birds fed one percent S. mirzayanii were lower than other groups (P<0.05). Using S. mirzayanii at the levels of 0.25 and 0.5 percent significantly increased cecal lactic acid bacterial population (P<0.05). Feeding with the levels higher than 0.5 percent S. mirzayanii decreased cecal coliforms compared with control group (P<0.05). Based on results of this experiment, using 0.5 percent S. mirzayanii leaf powder in diet of broilers would improve cecal microbial population as well as growth performance.
Daryush Khademi Shurmasti; Farid Shariatmadari; Mohammad Amir Karimi Torshizi; Houshang Lotfollahian
Volume 17, Issue 2 , October 2015, , Pages 211-221
Abstract
The present study was carried out to evaluate the effects of vegetable fat sources and additives on performance and morphological parameters of the small intestine of Arain broiler chickens. Birds were randomly used in a 2×3 factorial arrangement of dietary treatments included two fat sources (canola ...
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The present study was carried out to evaluate the effects of vegetable fat sources and additives on performance and morphological parameters of the small intestine of Arain broiler chickens. Birds were randomly used in a 2×3 factorial arrangement of dietary treatments included two fat sources (canola or pumpkin seed) and three additives (without additive, 0.1 g/kg probiotic and 0.15 g/kg virginamycin) with four pen replicates and 20 birds per each. The growth performance and productive traits, with using of neither additives nor fat sources or fat sources × additives were unaffected. However, probiotic was significantly decreased crypt depth and increased villi height to crypt depth ratio in jejunum and ileum (P<0.01). Likewise, the highest of villi height and villi height to crypt depth ratio in jejunum and ileum especially was obtained with combination of pumpkin seed oil and probiotic (P<0.05). Crypt depth, villi thickness and surface area was higher in duodenum of broilers were fed with pumpkin seed oil (P<0.05).Thus, probiotic bactocell can be used in diets contain linoleic-oleic (pumpkin seed oil) and linolenic (canola oil) fat groups without negative effect on performance and productive traits.
Farhad Mohammadi; Farzad Bagherzadeh Kasmani; Kamal Shojaian; Mehran Mehri; Mohammad Amir Karimi Torshizi
Volume 17, Issue 2 , October 2015, , Pages 301-309
Abstract
Effect of adding Hibiscus sabdariffa (HS) in diet on performance and immune response of broilers was examined during aflatoxicosis using a total of 192 day-old Ross 308 male chicks in a completely randomized design with four treatments, four replicates and 12 chicks per each replicate. Treatments were ...
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Effect of adding Hibiscus sabdariffa (HS) in diet on performance and immune response of broilers was examined during aflatoxicosis using a total of 192 day-old Ross 308 male chicks in a completely randomized design with four treatments, four replicates and 12 chicks per each replicate. Treatments were include: 1. negative control (without additives), 2. positive control (2.5 mg aflatoxin B1/kg), 3. diet containing Hibiscus sabdariffa(10 g HS/kg) and 4. diet contaminated with aflatoxin and containing Hibiscus sabdariffa (2.5 mg AFB1/kg + 10 g HS/kg). Effect of treatments on feed intake was not significant. Weight gain of chicks in positive control treatment was lower than those birds in other treatments (P<0.001). These birds had higher feed conversion ratio (P<0.001). Antibody titer against Newcastle disease virus and sheep red blood cell in birds fed positive control and containing Hibiscus sabdariffa diets were lower and higher than those birds in negative control group, respectively (P<0.001). The least skin thickness after challenging with dinitrochlorobenzene (DNCB) was observed in birds fed positive control diet (P<0.001). Relative weight of bursa of Fabricius in chicks fed positive control and Hibiscus sabdariffa diets was lower and higher than that of negative control group, respectively (P<0.001). Based on results of this experiment, supplementation of Hibiscus sabdariffa to aflatoxin contaminated diets could ameliorate the effects of toxin on growth performance and immunity response of broilers.
Sahere Gharibi; Mohammad Houshmand; Reza Naghiha
Volume 17, Issue 2 , October 2015, , Pages 403-413
Abstract
This study was conducted to investigate the influences of raw or acetic acid-treated oak acornon the performance and cecal flora of broiler chickens. A total of 340 one-day-old male and female Cobb 500 broiler chicks were used in a completely randomized design consisting of five treatments with four ...
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This study was conducted to investigate the influences of raw or acetic acid-treated oak acornon the performance and cecal flora of broiler chickens. A total of 340 one-day-old male and female Cobb 500 broiler chicks were used in a completely randomized design consisting of five treatments with four replicates and 17 chicks each. First group was fed with a corn-based diet (without oak acorn) as control, while the chicks of groups 2, 3, 4 and 5 were fed with diets containing 20 or 25 percent raw or treated oak acorn, respectively. The results indicated that treatment with acetic acid significantly reduced content of the all phenol components (total phenol, total tannin and condensed tannins). Dietary inclusion of raw oak acorn at the levels of 20 and 25 percent, significantly reduced broilers body weight gain (P<0.05). However, this reduction was not observed for treated groups. Feeding with raw or treated oak acorn resulted in higher feed conversion ratio compared with the control group (P<0.05). E. coli and lactic acid bacteria counts were not affected by dietary treatments at 21 or 42 day of the study. In conclusion, dietary inclusion of 20 and 25 percent raw or treated oak acorn resulted in a significant reduction in broilers performance and hence, it is not recommended.
Mohammad Hossein Nemati; Mohammad Hossein Shahir; Mohammad Taher Harakinezhad; Houshang Lotfollahian
Volume 15, Issue 1 , July 2014, , Pages 45-53
Abstract
This experiment was conducted to determine the effect of vitamin C (VC) and coenzyme Q10 (CoQ10) onimmunity response of broilers in cold stress condition using 500 male chicks in a completely randomizeddesign with 5 treatments and five replicates. Treatments were: positive control (PC, normal conditionsgrowth ...
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This experiment was conducted to determine the effect of vitamin C (VC) and coenzyme Q10 (CoQ10) onimmunity response of broilers in cold stress condition using 500 male chicks in a completely randomizeddesign with 5 treatments and five replicates. Treatments were: positive control (PC, normal conditionsgrowth without antioxidants), negative control (NC, cold stress without antioxidants), cold stress + VC(300 mg/kg diet), cold stress + CoQ10 (40 mg/kg diet) and cold stress + VC + CoQ10 at above mentioneddoses. To induce cold stress, from day 15 until end, temperature fixed at 15oC. Vaccine titers, humeraland cellular immune response and relative immune organs weight were studied. Results showed that coldstress decreased relative spleen weight but there was no significant difference between treatments.Relative weight of bursa was increased in cold stress condition (P<0.01) and using antioxidant especiallyCoQ10 decreased it (P<0.05). Lymphocyte percent decreased in cold stress (P<0.05). Improved cellmediatedimmune response to subcutaneous injection of phytohemagglutinin and proliferation of Tlymphocyte in vitro were observed (P<0.05). In conclusion, use of antioxidants VC and CoQ10 in the coldstress condition improved immune system activity and decreased mortality
Mohammad Roostaei-Ali Mehr; Marziyeh Ghamgosar; Mahmoud Haghighian Roodsari
Volume 16, Issue 1 , May 2014, , Pages 21-29
Abstract
Experiment was conducted to evaluate the effect of SAF-Mannan on productive performance and intestinal microflora by 180 day-old chicks. At six d, Chicks were divided to five groups (treatments) and each group was split into three replicates which included 12 birds. Amounts of 0.3 mg/Kg lincomycin premix, ...
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Experiment was conducted to evaluate the effect of SAF-Mannan on productive performance and intestinal microflora by 180 day-old chicks. At six d, Chicks were divided to five groups (treatments) and each group was split into three replicates which included 12 birds. Amounts of 0.3 mg/Kg lincomycin premix, 0 (control), 0.5 (A0.5) and 1 (S1) g/Kg SAF-Mannan for total period were added to diet of the first four treatments and also 0.25and 0.75 g/Kg SAF-Mannan for starter and grower, respectively were added to diets of the fifth treatment (S0.25-0.75). Poupulation of E. coli and lactobacillus of ileal samples were assayed at 18, 28 and 38 d of age. The results showed that birds fed on SAF-Manan diets had lower feed conversion ratio compared to control group (P<0.05). At 18 and 28 d, the E. coli count in the al content of SAF-Manan treatments was lower than controland lincomycin treatment (P<0.05). At 28 d, lactobacillus count in ileal content of birds fed on dietd containing 1 g SAF-Manan was higher compared to other treatments (P<0.05). It could be conclude that addition of 0.5 g/Kg SAF-Manan to broiler diet improve weight gain and feed conversion ratio probably, by modifying of intestinal microflora.
Golestan Golestani Milanloo; seyed davood sharifi; Akbar Yaghoub far; Ali akbar Khadem
Volume 13, Issue 2 , March 2012, , Pages 1-10
Abstract
This study was carried out to investigate the effects of Natuzyme Plus (a multi enzyme) in diets containing wheat and canola meal on broiler performance. A total of 336 day-old Arbor Acres broiler chicks were used in a completely randomized design with six treatments and four replicates. Experimental ...
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This study was carried out to investigate the effects of Natuzyme Plus (a multi enzyme) in diets containing wheat and canola meal on broiler performance. A total of 336 day-old Arbor Acres broiler chicks were used in a completely randomized design with six treatments and four replicates. Experimental diets were: 1 . Diet based on corn-soybean meal (control), 2 . Diet containing 30 precent wheat and 3 . Diet containing 30 percent wheat + 10 percent canola meal, which Natozyme was added (350 g/ton) to these diets to make diets containing enzyme (totally six treatments). Adding enzyme to diet containing wheat and canola meal increased significantly feed intake, weight gain and feed conversion ratio (FCR) at starter and overall rearing period (P< 0.01). Use of Natuzyme Plus in diet containing wheat and canola meal reduced significantly the relative weight of digestive organs in compared of same diets without enzyme. The results of this study indicate that the performance of broiler chickens fed the diets containing wheat and canola meal could be improve by supplementing with Natuzyme plus preparations.
Majid Alahyari Shahrasb; Hossein Moravvej; Mahmoud Shivazad
Volume 13, Issue 2 , March 2012, , Pages 39-48
Abstract
This experiment was conducted to evaluate the effects of reduction or removal of dietary vitamin premix during finisher period (29-42 days of ages) on performance and immunocompetence of broiler chicks fed wheat and barley based diet. A total of 288 male broiler chicks (Ross 308) were allocated to four ...
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This experiment was conducted to evaluate the effects of reduction or removal of dietary vitamin premix during finisher period (29-42 days of ages) on performance and immunocompetence of broiler chicks fed wheat and barley based diet. A total of 288 male broiler chicks (Ross 308) were allocated to four treatment groups, with four replicates per treatment group and 18 birds per replicate pen at 29 day of age. The dietary treatments were: T1) the basal diet with no vitamin premix, T2) the basal diet 33.33 percent vitamin premix, T3) the basal diet 66.66 percent vitamin premix and T4) the basal diet 100 percent vitamin premix. Feed intake and weight gain were measured at 35 and 42 days of ages and feed conversion ratio was calculated. At 35 and 42 days of age, after slaughtered and determine carcass weight and the organs bursa of fabricius and spleen weights and immunocompetence was evaluated at 42 day of age, based on SRBC, IgG and IgM titers. Results showed that different levels of vitamin premix did not impair performance and immunocompetence response during the final period of broilers (29-42d). In conclusion, it is possible to remove vitamin premix from finisher diets.
M. A. Alamian; A. A. Khadem; S. D. Sharifi
Volume 14, Issue 2 , January 2012, , Pages 1-10
Abstract
The effects of phytase and glycosidase supplementation to diets containing rice bran on broiler performance were investigated by using 200 day old (308 Ross) broiler chicks in a completely randomized design with five treatments and four replicates. The five dietary treatments were as: corn-soybean meal ...
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The effects of phytase and glycosidase supplementation to diets containing rice bran on broiler performance were investigated by using 200 day old (308 Ross) broiler chicks in a completely randomized design with five treatments and four replicates. The five dietary treatments were as: corn-soybean meal based diet; diet containing rice bran; diet containing rice bran supplemented with Natafous; diet containing rice bran supplemented with Safizyme, and diet containing rice bran supplemented with Natafous and Safizyme. The dietary levels of rice bran were 15, 20 and 25 percent for the starting, growing and finishing diets, respectively. Birds fed on rice bran + enzyme added diets consumed less feed (P< 0.05) than those fed on unsupplemented rice bran contained diets. The enzyme addition to rice bran containing diets improved the villi length and weight gain of birds at different rearing periods (P< 0.05). In conclusion, results showed that the Natafous or Safizyme supplementation in diets could improve the performance of broiler chicks when rice bran was used at a level of 15, 20 and 25 percent in starter, grower and finisher diets, respectively.
Seyd Davoud Sharifi; Amin Dibamehr; Houshang Lotfollahian
Volume 13, Issue 1 , September 2011, , Pages 7-16
Abstract
The effects of probiotics and antibiotics and fat type in diet on broiler performance were studied by using 900 one-day old Ross 308 chicks in a three × three factorial arrangement with three types of fat (nonfat, three percent fatty acid and three percent soy oil) and three growth promoters (without ...
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The effects of probiotics and antibiotics and fat type in diet on broiler performance were studied by using 900 one-day old Ross 308 chicks in a three × three factorial arrangement with three types of fat (nonfat, three percent fatty acid and three percent soy oil) and three growth promoters (without GP, flavomycin and protexin) in completely randomized design with four replicates per each treatment. Fat and its type had significant effects on weight gain and the body weight gain of birds fed diets containing soy oil were better (P< 0.05). Dietary flavomycin supplementation improved weight gain and FCR (P< 0.05). The fat type × growth promoter’s interaction influenced broiler performance, significantly (P< 0.05). Birds fed on diets containing soy oil and flavomycin showed the highest feed intake and weight gain, whereas, the lowest feed intake and weight gain was belonged to birds fed diets containing fat and protexin (P< 0.05). From the results obtained, it can be indicated that addition of protexin to diets containing fat has negative effect on broiler growth performance.
Seyed Davoud Sharifi; Ehsan Tavazoei; Ali Akbar Khadem; Abbas Barin
Volume 12, Issue 2 , October 2010, , Pages 11-20
Abstract
In this study, the effect of different levels of fat with antibiotics and probiotics on blood biochemical traits and performance of broiler chicks was investigated. In a factorial experiment, 288 Day-old Ross broiler chicks treated with two level of fat (3 and 6 percent) and three additives (Flavomycin, ...
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In this study, the effect of different levels of fat with antibiotics and probiotics on blood biochemical traits and performance of broiler chicks was investigated. In a factorial experiment, 288 Day-old Ross broiler chicks treated with two level of fat (3 and 6 percent) and three additives (Flavomycin, Protexin and none-additive). The birds were allocated randomly in six treatments with four replicates and 12 birds per replicat. Results showed that the chicks fed on diets containing 3 percent of fat + Flavomycin had higher feed intake and body weight gain compared to birds fed with fat + Protexin (P< 0.05). The concentration of cholesterol, HDL and LDL in serum of birds of 6% fat was more than of those fed diets with 3% fat. Birds fed diets containing protexin had lowest cholesterol, HDL and LDL (P< 0.05). It was concluded that supplementing the rations containing fat with probiotics decrease feed intake and body weight gain in broilers chicks and their performance decrease by increasing fat in diets.