Animal and poultry physiology
Mahmood Sahraei; nader asadzadeh
Abstract
The aim of this study was to improve the reproductive function of Moghani ewes in pasture conditions by using PMSG and GnRH following estrus synchronization. In experiment 1, at least 160 ewes were selected to perform the first step in the beginning of May. In this flock, four groups including control ...
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The aim of this study was to improve the reproductive function of Moghani ewes in pasture conditions by using PMSG and GnRH following estrus synchronization. In experiment 1, at least 160 ewes were selected to perform the first step in the beginning of May. In this flock, four groups including control group (first), synchronization with progesterone sponge (second), synchronization with progesterone sponge plus injection of 400 IU PMSG on the day of sponge removal (thrid) and synchronization with progesterone sponge plus injection of 400 IU PMSG on the day of sponge removal and injection of 2 ml and Vitarolin (GnRH source) 50 hours after sponge removal(fourth). In the experiment 2, born lambs were fed by concentrate with 17.5% crude protein and 2.75 Mcal / kg metabolizable energy per kg of diet during suckling period for 90 days. The lowest lamb weight efficiency was obtained in the non-synchronized and hormone-treated (control) and progesterone-synchronized groups and the highest in the synchronized group plus the injection of 400 IU PMSG and 2 ml Vitarolin (P<0.05). The lowest yield of lamb birth weight was obtained in the first and second groups and the highest in the third group (P<0.05). In terms of weaning weight efficiency of lambs, the lowest amount was observed in the first and second groups and the highest in the third and fourth groups (P<0.05). In general, compared to the control treatment (first group), 60% more income was earned by the herdsman in the fourth group.
Animal and poultry nutrition
Mahmood Sahraei; nader asadzadeh; akbar abarghani
Abstract
This study aimed to investigate the effects of human resource training on improving production index of broiler farms in Ardabil province. Initially, out of 418 active broiler farms, the status of 50 farms was examined at the provincial level. The production units were divided into the following groups ...
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This study aimed to investigate the effects of human resource training on improving production index of broiler farms in Ardabil province. Initially, out of 418 active broiler farms, the status of 50 farms was examined at the provincial level. The production units were divided into the following groups based on production index and using cluster analysis: group 1 (production index equivalent to 250), group 2 (production index less than 250 and greater than 200), group 3 (production index less than 275 and greater than 250), group 4 (production index less than 300 and greater than 275), and group 5 (production index greater than 300). Subsequently, these groups were trained in both face-to-face and non-face-to-face formats during the production period. In this process, factors affecting production index were also evaluated, and existing issues were examined in each trained farm. Finally, the obtained data were compared with the current conditions using paired t-test. The results of this study indicated that in groups with production index less than 250, training significantly increased feed conversion ratio by 7% and production index by 14% (p<0.05). However, in the group with a production index above 300, a less significant impact was observed on slaughter weight and production index (p<0.05). Overall, human resource training had a greater effectiveness in improving production index in low-performing units.
Animal and poultry nutrition
Mahmood Sahraei; nader asadzadeh; Akbar Yaghobfar
Abstract
This experiment was performed to evaluation treated wheat screening waste in diet of broiler chickens. A total of 432 broilers (Ross 308) were used in completely randomized design for 9 treatments with 4 replicates of 12 chicks per replicate for 42 days. Treatments included 1) corn and soybean meal 2) ...
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This experiment was performed to evaluation treated wheat screening waste in diet of broiler chickens. A total of 432 broilers (Ross 308) were used in completely randomized design for 9 treatments with 4 replicates of 12 chicks per replicate for 42 days. Treatments included 1) corn and soybean meal 2) corn and soybean meal in which 15% corn was replaced with wheat screening 3) corn and soybean meal in which 30% corn with substituted by wheat screening 4) diet 2 Natuzyme plus500 g /tone of diet 5) diet 3 + Natuzyme plus diet 500 g / tone of diet 6) diet 2 + protxin 150 g / ton of diet 7) diet 3 + protxin 150 g / tone of diet 8 ) diet 2+ 75 g protxin + 250g Natuzyme plus /ton of diet 9) diet 3+ 75 g protxin + 250g Natuzyme plus /ton of diet. In terms of production efficiency index, the highest levels was observed in control and in the diet containing 15% wheat screening with and without enzyme, probiotic and enzyme + probiotic (P<0.05). The highest villi length was observed in the treatments receiving 15% wheat screening wastes + multi-enzyme + probiotic supplement )P<0.05). In conclusion, the results of this experiment showed that, corn of diet replaced by 15% of wheat screening pluse 250 g of enzyme + 75 g probiotic per ton of diet can be used in broiler diets without any adverse effects on performance, production index and nutrient digestibility
Mahmood Sahraei; Hassan sadeghipanah; nader asadzadeh; Abazar ghanbari
Abstract
This experiment was carried out to investigate the Moghani ewe production performance improvement through reproductive management and nutrition methods during the non-breeding season in rangeland condition. For doing these projects, in one flock with 400 ewes, two groups were identified, that including ...
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This experiment was carried out to investigate the Moghani ewe production performance improvement through reproductive management and nutrition methods during the non-breeding season in rangeland condition. For doing these projects, in one flock with 400 ewes, two groups were identified, that including group 1(estrus synchronization+hormone therapy+supplementary feeding) and group 2 or control group (without estrus synchronization+ hormone therapy+supplementary feeding). Supplementary feeding duration in pre mating for 4 weeks and 1.5 month in late gestation with concentrate were done. During the project, production, reproductive traits and economical evaluation was carried out in each two groups. For quantities data analysis of T-test methods and for qualitative traits were used of frequency table and Chi-square. The results showed that, parturition rate, lamping rate, twining rate, born lamb crop (BLC) and weaned lamb crop (WLC) in experimental group was more than control group (p<0.05). In terms of fecundity, there was significant statistical difference between two methods, so that 104.21 vs. 48.64 percent in experimental group compared with control group were observed (p<0.05). In conclusion, in non-breeding season, in Moghani ewe using of estrus synchronization+hormone therapy+supplementary feeding, have the highest economic interest compared to the control group.
Mahmood Sahraei; Abazar Ghanbari; R. Karami; H. Lotfollahiean; A. Yaghoubfar; D. Shakori; A. Abarghani
Abstract
For study the effects of different levels of wheat screening waste, canola meal with and without multi enzyme on performance, viscosity and nutrient digestibility, 240 Ross- 308 male broiler chicks were used in a completely randomized design with six treatments and four replicates by 10 chicks in each ...
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For study the effects of different levels of wheat screening waste, canola meal with and without multi enzyme on performance, viscosity and nutrient digestibility, 240 Ross- 308 male broiler chicks were used in a completely randomized design with six treatments and four replicates by 10 chicks in each replicate from 11 to 46 days. Diets were: 1) Diet based on corn-soybean meal (control), 2) Basal diet replaced by 50% wheat screening waste and canola meal, 3) Basal diet replaced by 100% wheat screening waste and canola meal, 4) Diet based on corn-soybean meal pulse 500 g multi enzyme/ton of diet, 5) Basal diet replaced by 50% wheat screening waste and canola meal pulse 500g multi enzyme/ton of diet, and 6) Basal diet replaced by 100% wheat screening waste and canola meal pulse 500g multi enzyme/ton of diet. The best feed conversion ratio, energy and protein intake efficiency, production efficiency index achieved in 1, 4 and 5 diets (P<0.05). The highest percentage of ileal digestibility of crude protein, crude fat, phosphorus and apparent metabolisable energy were seen in broilers fed by 1, 3 and 5 diets (P<0.05). In conclusion, replacing of corn and soybean meal in based diets up to 50% with grade one of wheat screening waste and canola meal pulse multi enzyme had no adverse effects on performance, production index and ileal nutrient digestibility. Consuming of this diet, from economical aspects had suitable.
Mahmood Sahraei; H. Lofollahiyan; A. Ghanbari; R. Karami; S. A. Hoseini; A. Abarghani; M. Bohlouli
Abstract
For evaluating the broiler farm management indexes at Ardabil province, were used of questionnaires filling method in 71 active raising broiler chicken farms. Selecting of mentioned units was done based on stratified random sampling method using proportional allocation technique. Higher and lower percentge ...
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For evaluating the broiler farm management indexes at Ardabil province, were used of questionnaires filling method in 71 active raising broiler chicken farms. Selecting of mentioned units was done based on stratified random sampling method using proportional allocation technique. Higher and lower percentge of broiler farms located in cities of Ardabil and Bilesuar, respectively. The mean duration of broiler breeding, feed conversion ratio, productive efficiency index, final weight and mortality were 49.20 days, 2.17, 243.08, 2.72 kg and 5.42 percent, respectively. More than half of broiler farms (55.20%) in the current study were used of diets in mash form and more than third (27.60%) of them used of the mash and pellet (crumble form in first week of breeding period). Most broiler farms in this study were used of 3 to 4 diets during rearing addressing. The 32.75 percentage of broiler farms were used of diets with energy to crude protein ratio based on manual guide book standard(often Ross308), 20.72 percent of more than the standard and 46.55 percent of lower than standard. The highest production efficiency index was seen in the group that fed diets with standard energy to crude protein ratio and the lowest was observed in the group has a lower of energy to crude protein ratio (p=0.0014). During the period of production, slaughter weight, feed conversion ratio and mortality percent had significant effect on production efficiency index. Therefore, for achieving suitable performance in broiler chicken raising, pay attention to nutrition management should be first.
Mahmood Sahraei; S. A. Hoseini; A. Ghanbari; A. Mostafa Tehrani; S. Rahimi
Abstract
To investigate the mineral composition of mineral oyster produced in Khowsar city of Ardabil province, two experiments were performed. In the first study, in six composed samples and one type commercial oyster level of calcium, phosphorus, magnesium, fluorine and their solubility of in 0.1 N of HCL and ...
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To investigate the mineral composition of mineral oyster produced in Khowsar city of Ardabil province, two experiments were performed. In the first study, in six composed samples and one type commercial oyster level of calcium, phosphorus, magnesium, fluorine and their solubility of in 0.1 N of HCL and double distillated water, were done. Only calcium amount and solubility rate in Ardabil oyster, lower than commercial oyster (p<0.05). In second stage, were used of 240 one day old male Ross 308 broiler chickens in completed randomized design with 5 treatments by 4 replicates containing 12 chicks from 1-46 day old. In these experiment, Replaced commercial oyster with Ardabil oyster in five levels (0, 25, 50, 75 and 100). Performance indexes, carcass traits, tibial bone morphology had not significant in different treatments. Calcium apparent retention and blood calcium concentration in treatments containing 75 and 100 percent of commercial oyster was higher than diet containing 100 percent Ardabil oyster (p<0.05). The highest relative bioavailability (RBV) about 110.63 was seen in diets containing 25 percent Ardabil oyster plus 75 percent commercial oyster in grower phase and vice versa in finisher phase. Overall, based on performance indexes and bone morphologic traits, commercial oyster in broiler chicken diets could be replaced by 100 percent level of Ardabil oyster.
