Sari Agricultural Science and Natural Resources University
Research On Animal Production
2251-8622
2
3
2011
5
1
The Effects of Different Systems of Expressing Metabolizable Energy and Amino Acid of Diet, on Performance and Carcass Characteristics of Broiler Chicks
1
11
FA
Akbar
Yaghobfar
Animal Science Institute Reserch Conter, Karaj
Keyvan
Karkody
Associate Profesor, Islamic Azad University, Saveh Branch
Mohammad
Dibaeeian
M.Sc. Student, Islamic Azad University, Saveh Branch
This study was conducted to evaluate the effects of formulateddiet based on nitrogen-corrected apparent and true metabolizable energy (AMEn, TMEn), total and digestible amino acid of feedstuff on broiler performance and carcass characteristics of Ross 308 broiler chickens. This experiment was carried out as 2×2 factorial arrangement with compeletely randomized desing Main factors including method of formulating diet based on total and digestible amino acid and based on apparent and true metabolizable energy of feedstuff. A total of 400 one day-old chicks were randomly assigned to 4 treatments with 5 replicates and 20 chicks per replicate. Experimental parameters for periods of 1-21, 22-42 and 1-42 days were measured. The results showed that the body weight gain and feed intake increased significantly when the chicks were fed with diet based on AMEn and digestible amino acid in whole periods of experimen (p<0.05). Feed conversion ratio significantly decreased in chicks fed with diet based on AMEn and digestible amino acid during 1-21 and 1-42 days of age. Dietary treatments had significant effect on breast and thigh yield, but had not significant effect on carcass carocteristics (p>0.05). The results obtained in the present study demonstrated that formulation of diets based on AMEn and digestible amino acid improved performance of Ross 308 broiler chicks.
Sari Agricultural Science and Natural Resources University
Research On Animal Production
2251-8622
2
3
2011
5
1
Effects of Environmental Factors on Phenotypic Growth Traits in Naini Sheep
12
22
FA
Mojtaba
Najafy
College of Animal Science and Fishers, Sari Agriculture Sciences and Natural Resources
Ghodratollah
Rahimi
College of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University
Zarbakht
Ansari
College of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University
Hasan
Baneh
College of Animal Science and Fishers, Sari Agricultural Sciences and Natural Resources University
Zohreh
Yosefi
College of Animal Science and Fishers, Sari Agriculture Sciences and Natural Resources
This research was carried out to study the effects of environmental factors on growth traits in Naini sheep breed. The growth related data (birth weight, weaning weight, six month weight, klieber ratio, average daily gain from birth to weaning and birth to six month) were collected from 6296 sheep which had been recorded during 2001-2008 at Naini sheep breeding station in Esfahan. Data were analyzed by general linear models using SAS program version 9.1. The effect of birth type was significantly (P>0.05) affected only birth weight but the age of dam has not significant effect (P<0.05) on any of the studied triats in this breed. The birth-year and herd had a significant effect on all growth traits (P<0.01). The obtained results showed that the incidence of growth traits in Naini sheep especially after birth age less affected by physiological factors (type of birth, lamb sex and age of dam), while the change in management factors can cause considerable variation in body weight of lambs in this breed.
Sari Agricultural Science and Natural Resources University
Research On Animal Production
2251-8622
2
3
2011
5
1
Effect of Beta Agonist Zilpaterol Hydrochloride on Feedlot Performance, Carcass Traits and Some Blood Parameters in Castrated Mahabadi Male Kid Goats
23
35
FA
Ali
Hatefi
Faculty of Agricultural Science and Natural Resource, University of Tehran, Karaj
Armin
Towhidi
Faculty of Agricultural Science and Natural Resource, University of Tehran, Karaj
Abolfazl
Zali
Faculty of Agricultural Science and Natural Resource, University of Tehran, Karaj
Saeed
Zeinoddini
Faculty of Agricultural Science and Natural Resource, University of Tehran, Karaj
Mehdi
Ganj khanluo
Faculty of Agricultural Science and Natural Resource, University of Tehran, Karaj
Yasser
Khalifelou
Faculty of Agricultural Science and Natural Resource, University of Tehran, Karaj
The objective of this study was to evaluate the effect of Zilpaterol hydrochloride as a beta agonist on feedlot performance, carcass traits and some of blood metabolites in castrated Mahabadi male kid goats. Thus, 14 castrated male kid goats with 23 kg live body weight and 6 months old were used based on completely randomized design with 7 repeats per treatment for 93 days of feedlot period. The male kids were fed diets containing 15.2% crude protein and 2.35 Mcal/kg ME. In day 60 of Feedlot period, the goat kids were fed to (0.2 mg kg/ live weight) zilpaterol hydrochloride for 30 days. After 3 days of withdrawal from feedlot period, all of kids were slaughtered in industrial slaughterhouse. In this trial, Zilpaterol hydrochloride caused to increase live body weight (P<0.05) at end of the period and decrease feed intake (P<0.05). Zilpaterol Hydrochloride also decreased plasma glucose (P<0.01), triglyceride and cholesterol (P<0.05). Zilpaterol Hydrochloride increased hot carcass weight (HCW) (P<0.05), longissimus muscles area (P<0.01) and improved dressing percentage (P=0.07), while decreased abdominal fat (P<0.01), heart weight (P<0.05) and back fat thickness (P<0.03). Thus, it seemes that using zilapterol hydrochloride can improve growth performance and carcass quality in castrated male kids.
Sari Agricultural Science and Natural Resources University
Research On Animal Production
2251-8622
2
3
2011
5
1
The Effects of Acid Treatment and Particle Size on Degradability Parameters of Canola meal and Alfalfa Hay in Rumen
36
48
FA
Sobhan
Golchin-Gelehdooni
College of Animal Science, Islamic Azad University, Tehran Sciences and Researches Unit
Asadollah
Teimori-Yanesari
College of Animal Science and Fishers, Sari Agricultural Sciences and Natural Resources University
Ayoub
Farhadi
College of Animal Science and Fishers, Sari Agricultural Sciences and Natural Resources University
This experiment carried out in order to determine the effects of chemical treatments and particle size on ruminal degradability parameters of canola meal and alfalfa hay. In this experiment, two head of zell ewes with 30±2 Kg body weight were used which surgically fitted with ruminal cannulas. Samples were placed in nylon bags and then incubated in the rumen at 0, 3, 6, 9, 12, 36, 48, 72 and 96 hours that fed with the ration including of alfalfa hay and barley grain in 75:25 ratio (based on dry matter). Data obtained from this experiment were analyzed as factorial arrangement with completely randomized design. Ruminal degradability of Canola meal and alfalfa hay dry matter, crude protein and neutral detergent fiber parameters, significantly affected by acid levels (0 and 5%), particle size (long and fine) and interaction between treatments. Also, these parameters for alfalfa hay affected by forage particle size. Use of acid and different particle size, decreased potentially degradable protein and degradability rate of canola meal and alfalfa hay dry matter following by decrease of alfalfa particle size in rumen. Also, use of acid, increased NDF degradability of canola meal in rumen, nevertheless following by decrease of alfalfa forage particle size, NDF degradability decreased. The results of CP degradability showed that CP degradability of treated canola meal, decreased significantly in the rumen. By decreasing of particle size of alfalfa, CP degradability significantly decreased.
Sari Agricultural Science and Natural Resources University
Research On Animal Production
2251-8622
2
3
2011
5
1
Effect of Retinoic Acid on in Vitro Maturation of Ovine Immature Oocytes Containing Cumulus Cells
49
58
FA
Marzieh
Khani
Collage of Animal Science, University of Tabriz
Hossein
Daghigh kia
Collage of Animal Science, University of Tabriz
Ahmad
Zare-Shahneh
Collage of Animal Science, University of Tehran, Karaj
Sadegh
Alijani
Collage of Animal Science, University of Tabriz
This study was carried out to investigate the effect of all-trans retinoic acid (t-RA) on in vitro maturation of ovine immature oocytes containing cumulus cells. The Oocytes with cumulus cells were recovered from follicles (2-6 mm in diameter). Different concentrations of t-RA (0, 1, 1.5 and 2 μmol) were added in the maturation medium. For oocytes maturation, all groups were located in the CO2 incubator for 24 hours. The meiosis and nuclear maturation status of the oocytes in each experimental group were assessed using an invert microscope and the data were analyzed with GLM procedure. There are not any oocytes in GV stage. The percentage of oocytes in GVBD stage at control group in comparison with 1 μmol and 2 μmol treatments was significant (p<0.05). The rate of oocytes maturation in 2 μmol retinoic acid treatments were significantly more than other groups (P<0.05). In conclusion, the use of 2 μmol retinoic acid increased the ovine oocyte maturation significantly in the commercial TCM199 medium.
Sari Agricultural Science and Natural Resources University
Research On Animal Production
2251-8622
2
3
2011
5
1
Effect of Garlic Powder, Primalac Probiotic and Fermacto Prebiotic on Production Traits and Costs in Broiler Chickens
59
68
FA
Mehran
Nosrati
Islamic Azad University, Rasht Branch
Hamid
Deldaar
College of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University
Bahman
Navidshad
University of Mohaghegh Ardabili
A study carried out to compare three feed additives effects on performance and economical efficiency of broiler chickens. This research conducted using a completely randomized design with 4 treatments, 4 replicate and 25 chicks each replicate. The experimental basal diets formulated according to Ross 308 manual and the peribiotic, probiotic and garlic powder was added to the basal diets as additives. The treatments were: basal diet (free of additives), 2- basal diet + 0.3% Fermacto, 3- basal diet + 0.3% primalac and 4- basal diet + 1% garlic powder. All chicks were fed with same corn-soybean meal based additive free starter diet from 1-10 d and then at grower (11-28 d) and finisher period (29-42 d) were fed the experimental diets. The diet containing Fermacto prebiotic significantly increased the daily weight gain of chicks. In grower phase the birds fed with garlic powder consumed more feed, but in the finisher phase the significant difference was observed on feed intake in birds fed with fermacto prebiotic. The best feed conversion ratio achieved in treatment containing prebiotic or probiotic and other groups. The economical comparison of each kg of body weight gain showed an increase in costs of diet with garlic powder or Primalac probiotic and a decrease in the cost per Kg of body weight gain in treatment containing Primalac prebiotic in comparison to the control group.
Sari Agricultural Science and Natural Resources University
Research On Animal Production
2251-8622
2
3
2011
5
1
Effect of Corn Gluten Feed Utilization on Performance and Carcass Characteristics of Broiler Chicks
69
79
FA
Akram
Shabani
Gorgan University of Agricultural Sciences and Natural Resources
Behrouz
Dastar
Gorgan University of Agricultural Sciences and Natural Resources
This experiment was conducted in order to determine the effects of corn gluten feed (CGF) on performance and carcass characteristics of broiler chicks. Four hundred commercial Cobb 500 broiler chicks were fed with 4 dietary treatments consisted of a control treatment (without CGF) and treatments containing 5, 15 and 20% CGF in the starter period and 10, 25 and 30% CGF in the grower periods, respectively. Five replicates of 20 chicks were allocated to each treatment. Results showed that utilization of CGF up to 20% in starter and 30% in grower periods had not adverse effect on body weight gain, feed intake and feed conversion ratio of broiler chicks. There was not any significant difference among treatments for carcass characteristics such as edible carcass, drumstick and breast. Based on the results of this experiment, CGF can be used in broiler diets up to 20% in the starter and 30% in the grower periods without any adverse effect on performance and carcass characteristics.