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Articles by R. Ebrahimi
Total Records ( 5 ) for R. Ebrahimi
  R. Ebrahimi , M. Bojar Pour and S. Mokhtar Zadeh
  This study was conducted to evaluate the effects of three various physically form diets (whole pellet, whole crumble and mix crumble and pellet) on broilers performance. It was performed using 150 broilers (male and female mix) from commercial Arbor acres breed in a completely randomized design with 3 diets by 2 replication (25 chickens per each replication). Daily gain, feed intake and FCR measured in whole period, furthermore carcass mean, breast, femur, abdominal fat, liver and gizzard measured and analyzed in end of the experiment. Body weight had not significant different. Feed intake was highest in the pellet groups. FCR in the crumble groups was higher than the other groups.
  B. Talebanpour and R. Ebrahimi
  An upper-bound analysis is conducted for the newly introduced material processing method, “dual equal channel lateral extrusion”. The strain attained in the process is calculated by via the mean effective strain rate and deformation time, and then incorporated with the upper-bound formulation on power to yield an estimation of the extrusion pressure needed for the process. The estimated strain shows a good agreement with the previous works done for “channel angular deformation” which presumed an ideal deformation mode. The analytical extrusion pressure is then compared with the values obtained by experiments and showed that the analysis is capable of a good assessment of the process.
  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.
  R. Ebrahimi , M. Eslami , J. Fayazi and M.F. Jahromi
  This experiment was done to evaluate the potential use of steam treated bagasse pith (SPB) in feeding of Lori Ewes. Forty eight ewes with similar condition from many flocks of autumn of Lori sheep were included in this experiment. The ewes divide into 4 groups of 12 sheep. The ewes allocated into 4 different levels of SPB (0, 5, 10 and 15%) for pre and post lambing in a completely randomized design. The diets were formulated according to NRC (1994) and had similar quality for protein, energy and high concentration of other nutrient. Concentrates were included amounts of 0, 10, 20 and 30 percent of SPB witch replaced with wheat bran and barely. Ewes live weight were measured before and at lambing and 2 weeks interval after that until weaning lamb. Milk sampling for determination of fat, Protein, carbohydrate and Solid Not Fat (SNF). Blood collected via jugular vein to indicate baseline (blood urea nitrogen, triglyceride, cholesterol and glucose). Statistical analysis with SAS program (1994) was indicated that, there were not significant differences between diets for milk composition percentage (fat, Protein, carbohydrate and solid not fat) (p<0.05). The effect of different levels of SPB on body change weight ewes and Average Daily Gain (ADG) lambs not significantly (p<0.05) different. Also there were not significant differences between diets for plasma cholesterol, BUN, triglyceride and glucose (p<0.05). In conclusion result of that could be SPB substituted instead of 30% concentrates (15% of whole diet) with no negative effects on physiological and productivity in pre and post lambing.
  M. Bojar Pour , E. Bahmaninia , R. Ebrahimi and J. Fayazi
  This experiment was conducted to evaluate effect of different inclusion of oak kernel with determine food potential oak kernel substitute with corn seed on broiler chicken’s ration in particular their effect on feed intake, weight gain, feed conversion ratio and carcass broiler. The oak kernel was mixed with corn seed to replace 0, 7.5, 15 and 22.5% of dry matter. About 160 chickens are used in complete randomized design, 4 experimental treatments by 4 replication (per treatment 10 chicken replications) were feed to chickens in over 49 days. Statical analysis of dry matter intake, weight gain, feed conversion ratio for 7-35 days of chicken’s age were not significant means (p>0.05).
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