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Articles by E. Rowghani
Total Records ( 7 ) for E. Rowghani
  S. Nazifi , M. Mohebbi Fani , E. Rowghani and M.R. Behbood
  The relationship between Sub-Clinical Ketosis (SCK) and liver injuries within the first two months of lactation in three commercial dairy herds with rather constant routines in management and nutrition was studied. A total of 77 cows (38 cows in the first and 39 cows in the second months of lactation) were sampled for blood. The serum concentrations of glucose, beta-hydroxybutyrate (BHB), nonesterified fatty acid (NEFA), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), cholesterol, triglyceride and VLDL-cholesterol were measured at 30 and 60 days after calving. Sub-clinical ketosis was considered in cows with serum concentration of BHB>1000 μmol L-1. The concentration of serum glucose in cows with SCK was significantly (p<0.05) lower than healthy cows after 30 days of calving. However, the concentrations of serum BHB, NEFA, triglyceride and VLDL-Cholesterol in SCK cows were significantly higher (p<0.05) than the healthy cows. In second month of lactation, the concentrations of serum BHB and NEFA in SCK cows were significantly higher than the healthy cows. The concentration of serum BHB, NEFA, triglyceride and VLDL-cholesterol in SCK cows were significantly higher (p<0.05) than the healthy cows at 30 and 60 days postpartum periods. In the first and second months of lactation, a positive significant correlation was observed between serum glucose and GGT (R = 0.409, p<0.05) in the healthy cows. However, significant correlations were observed between serum glucose and cholesterol (R = 0.403, p<0.05) and GGT and cholesterol (R = 0.388, p<0.05) in cows with SCK. Hepatic injuries were not observed in cows with SCK. In spite of negative energy balance in the first and second months of lactation, liver function tests were normal. The results of this study showed that the concentration of serum BHB and NEFA of SCK cows within the first two months of lactation was significantly higher than healthy cows, possibly due to higher energy demands of cows at this stage.
  E. Rowghani , M. Arab and A. Akbarian
  The effects of dietary supplementation of a probiotic, Toxiban, Formycine and probiotic-Toxiban mixture on performance and immune response of broiler chicks were investigated. In a completely randomized design, one hundred fifty 14-days-old broiler chicks were assigned to 5 treatments with 5 replicates and 6 chicks in experimental unit. The experimental treatments were added to basal (starter and finisher) diets as follow: T (1): control group (C) that received starter and finisher diets, T (2): C plus 0.15 percent probiotic, T (3): C plus 0.1 percent Toxiban, T (4): C plus 0.1 percent Formycine and T (5): C plus mixture of 0.15 percent probiotic with 0.1 percent Toxiban. Additives except Toxiban, significantly (p<0.05) increased blood Newcastle antibody titer compared with the control group. Regarding Influenza antibody titer, there was significant differences between treatments except Formycine feeding. Only probiotic caused a significant (p<0.05) increased in blood Bronchitis antibody titer. Consumption of Formycine and probiotic+Toxiban mixture resulted in a significant decrease in blood Gamboro antibody titer (p<0.05). Chicks fed diets supplemented with Toxiban significantly (p<0.01) had higher body weight and better Feed Conversion Ratio (FCR) than other treatments. Results indicated that, consumption of Toxiban had the most positive effect on performance and probiotic alone or combination of probiotic and Toxiban had the best effect on blood antibody titers of broiler chicks.
  S.M. Ghoreishi , M.J. Zamiri and E. Rowghani
  Experiments were carried out to study the effect of feeding Megalac, calcium soaps of fatty acids (protected fat), on reproduction and lactation of sheep. In the first experiment, 20 Ghezel and 20 Mehraban cyclic fertile ewes (4-5 years old) were randomly allotted to 4 groups. The control group was fed with a balanced ration and the other groups received the same diet as well as a daily allowance of 40 g non-protected fat (NP), 40 g protected fat (LP), or 80 g (HP) protected fat. The ewes were fed with their respective rations for one cycle length. Blood samples were collected and analyzed for progesterone (P4), cholesterol (CHOL), High Density Lipoproteins (HDL), Low Density Lipoproteins (LDL) and triacylglycerols (TG). The ewes were slaughtered on their next estrous period and the size and number of follicles in ovaries were recorded. There were no significant effects of feeding fat on ovarian weights, cycle length and follicular numbers in each class, or on the size of the largest follicle. Serum concentrations of P4, CHOL, TG and HDL were greater for HP ewes as compared with the control ewes (p<0.05). In the second experiment, effects on lactation and lamb performance of feeding protected fat during mating, late gestation and early lactation were studied in Mehraban ewes. Milk and fat yields on day 25 of lactation were significantly increased by feeding protected fat. Protected fat resulted in lower weight loss in ewes and a higher lamb birth weight. Average daily weight gain of lambs from birth to day 60 and the weaning weight of lambs were increased by feeding protected fat (p<0.05). In conclusion, calcium soaps of fatty acids increased serum P4 between days 10 to 14 of the cycle which may be beneficial to early pregnancy maintenance. Protected fat seemed to have a beneficial effect on milk yield, fat yield, lamb daily gain, lamb birth weight and ewe weight loss.
  E. Rowghani , M.J. Zamiri and S.R. Ebrahimi
  Seventy Mehraban male lambs (initial live weight 43.9±4.3 kg) were used in a 70-day feeding experiment. Lambs were fed with 12 diets in a completely randomized design arranged in a 3x4 factorial trial with three levels of thiamin (0, 4 and 6 mg kg-1 DM) and 4 levels of monensin (0, 5, 11 and 22 mg kg-1 DM). A 21-day period was included for adaptation to the diets. Basal diet (dry matter basis) consisted of 7.5% corn silage, 8% alfalfa hay, 70% barley grain, 10% wheat bran, 3% cottonseed meal, 1.1% limestone and 0.4% vitamin and mineral supplement. Carcass characteristics, average daily gain and Feed Conversion Ratio (FCR) were not significantly (p>0.05) different between diets containing monensin and thiamin or their combinations with control. Daily dry matter intake was lowest (p<0.05) for diets 8 (11 mg monensin and 4 mg thiamin per kg DM) and 12 (22 mg monensin and 6 mg thiamin per kg DM) compared with diet 3 (6 mg thiamin per kg DM). BUN level and ruminal fluid pH were not significantly (p>0.05) different between diets. Blood glucose of lambs fed with 11 mg monensin/kg DM (50.6 mg dL-1) was higher (p<0.05) than control group (45.8 mg dL-1). Monensin tended to improve FCR. Monensin reduced DMI (p<0.05) and decreased feed consumption by 9.13-9.75% compared with the control diet. The effect of monensin on blood glucose concentration was significant (p<0.05) which was higher for two levels of monensin (11 and 22 mg kg-1 DM), compared with the control diet. Ruminal fluid pH was significantly (p<0.05) higher with all levels of monensin and at 22 mg kg-1 monensin, ruminal ammonia concentration was lowest (p<0.05). The overall effect of thiamin was a decrease (p<0.05) in BUN concentration.
  R. Ebrahimi , H.R. Ahmadi , M.J. Zamiri and E. Rowghani
  Fifty four Mehraban ram lambs (6-to 8-month old, initial live weight 35.4±4.2 kg) were assigned to a completely randomized design consisting of 9 groups and were fed for 70 days with diets containing three levels of energy (2.3, 2.5 and 2.7 Mcal metabolizable energy per kg dry matter) and three levels of protein (10.5, 12.5 and 14.5 percentage in dry matter). Either energy or protein levels alone significantly affected most of the parameters of lamb performance, but their interaction effect was significant only for feed conversion ratio, cold carcass weight, tail weight, flap weight and back fat (subcutaneous fat) depth. The lowest level of energy (2.3 Mcal ME per kg DM) resulted in a significant decrease in lamb performance as compared with other energy levels. Increasing energy concentration of the diet resulted in significant increases in fat percentage, but significantly decreased the moisture and protein content of the Longissimus dorsi muscle. Increased dietary protein level increased the daily DMI and ADG and at the same time improved the FCR. Hot and cold carcass weights increased significantly with increasing dietary CP levels, but dressing percentage was similar amongst the dietary protein densities. Dietary CP levels had no significant effect on the chemical composition of the Longissimus dorsi muscle. At the lowest energy level (2.3 Mcal ME per kg DM), dietary protein level had a significant effect on FCR (Table 4); with the diet containing 10.5% protein having the highest FCR. At the medium and low energy levels the lowest level of dietary protein concentration resulted in smaller carcasses. The highest level of protein along with the medium energy concentration resulted in smaller tail weights. Flap weight was significantly smaller at low energy concentration along with medium and low protein level. The lowest back fat depth was found in lambs fed on the low energy diet containing medium to high levels of protein.
  E. Rowghani , A.D. Boostani , H.R. Mahmoodian Fard and R. Frouzani
  The effect of dietary fish meal (FM) on production and egg yolk cholesterol of commercial Hyline White Leghorn hens (24-week old) was studied for four weeks. Eighty birds were given a corn-wheat-soyabean meal diet that contained either 0% (control diet, C) or 3% fish meal (DM basis). Hens were randomly divided into two experimental treatments with four replicates (10 hens per replicate). Egg weight, daily egg production (g/hen/day), daily feed consumption and feed conversion ratio were recorded. At the end of each week, 12 eggs from each group were randomly collected and egg yolk cholesterol, egg volume, shell thickness and Haugh unit (HU) were measured. There was no significant (p>0.05) effect of feeding 3% FM on egg yolk cholesterol concentration (mg/100 g yolk or mg/yolk) compared with the control diet, but 3% FM, tended to decrease egg yolk cholesterol concentration (1930.93 vs 2021.48 mg/100 g yolk ). Hens fed on 3% FM had higher (p<0.05) egg production, egg weight, egg volume, shell thickness, HU and better feed conversion ratio. It was concluded that under the condition of the study, feeding 3% fish meal improved egg production traits but was not able to reduce cholesterol concentration of the egg yolk although tended to reduce cholesterol concentration.
  E. Rowghani , A. Maddahian and M. Arab Abousadi
  The egg-yolk pigmentation properties of Marigold Flower (MF), Safflower Petals (SP), Red Pepper Meal (RPM) and Commercial Pigment (CP) were evaluated when used at different levels with a practical basal laying hens diet. A total of 240 laying hens were randomly divided into 48 groups, 5 birds per group cage. One of 12 experimental diets was fed to four cages (four replicates per each treatment). The experimental period lasted four weeks and during this period the birds had free access to feed and water. Test diets were produced by adding various levels of additives to basal diet. The egg production was recorded daily and egg-yolk color was examined using the Roche Color Fan (RYCF). Twelve yolks per diet were evaluated every three days during the experimental period. The results showed that, egg and yolk weight, daily feed intake, feed conversion ratio and egg production were not affected significantly by the dietary treatments. The egg-yolk color changed significantly (p<0.01) due to added pigments. The yolk color was improved within 10-13 days after feeding diets. The highest color pigmentation was obtained with the diet contained 3% RPM (12.55) whereas, the lowest color pigmentation obtained with the basal diet (5.54). MF was significantly (p<0.01) more effective in producing higher RYCF values than SP at all levels. Increasing the level of RPM, resulted in an increase reddish color pigmentation of yolk. The addition of 0.5% RPM and 0.6% CP resulted in optimum color pigmentation (9.67 and 9.57, respectively). The results indicated that RPM can be used as a potential natural color pigment in the diet of laying hens instead of CP and additionally the use of the level of RPM depends on the yolk color desired by the specific market.
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