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Articles by A.M. Tahmasbi
Total Records ( 9 ) for A.M. Tahmasbi
  A.H. Piray , H. Kermanshahi , A.M. Tahmasbi and J. Bahrampour
  Effects of matured caecal cultures (probiotic) of broiler breeders and Aspergillus meal prebiotic (Fermacto) on growth performance and organ weights of broiler chickens were studied from 1 to 42 days of age. 432 day-old Ross male broiler chickens were used in a 3×3 factorial arrangement with three levels of cecal cultures (0.0 , 5.0 and 10.0 mg L-1 in drinking water up to 7 days of age) and three levels of Aspergillus meal, Fermacto (0.0, 1.5 and 3.0 g kg-1) in 4 replicates (12 chickens per replicate) per treatment. The parameters, including Feed Intake (FI), Body Weight Gain (BWG) and Feed Conversion Ratio (FCR) were measured weekly during trial and weight of organs were measured at the end of the experiment. A significantly higher (p<0.01) BWG was found in 1.5 g kg-1 Fermacto-fed broilers as compared to control broilers at 14-21 days of age. The BWG was also significantly higher (p<0.01 ) in Fermacto-fed broilers as compared to control treatment at 21-28, 28-35 and 35-42 days of age, overall growing (21-42 d) and rearing periods (0-42 d). FI was significantly (p<0.01) higher for 1.5 g kg-1 Fermacto-fed broilers than that of control broilers at 14-21 and 0-21 days of age. FI was significantly greater (p<0.01 ) in Fermacto-fed broilers than that of control at 21-28, 28-35 and 35-42 days of age, during growing (21-42 d) and experimental (0-42 d) periods. FCR was improved significantly (p<0.05) by 3 g kg-1 Fermacto as compared to control at fist week. FCR was decreased significantly (p<0.05) in Fermacto-fed broilers as compared to control broilers at 21-28, 21-42 and 0-42 day of age. Relative weight of breast and thigh to body weight were significantly (p<0.01) higher in Fermacto-fed broilers as compared to control group. Cecum was significantly (p<0.01) longer in 10 mg L-1 of cecal contents and 1.5 g kg-1 Fermacto-fed broilers than those of other treatments.
  M. Kazemi , A.M. Tahmasbi , R. Valizadeh , A.A. Naserian and M.M. Moheghi
  In vitro gas production and in situ techniques were used to evaluate nutritional value of some alternative weed forages e.g., Sorghum halepense, Salsola kali, Convolvulus arvensis and Portulaca oleracea. Cumulative gas production was recorded at 2, 4, 8, 12, 24, 48, 72, 96 and 120 h of incubation also, in situ disappear of dry matter for these weed forage was measured at 0, 2, 4, 8, 16, 24, 48, 72 and 96 h of incubation and gas production constants (b and c) were described using the equation y = b (1-e-ct). The most cumulative gas production was for Sorghum halepense in time of 120 h incubation (116.67 mL/300 mg of sample incubated) and Portulaca oleracea was the lowest cumulative gas production for 120 h incubation (66.35 mL/300 mg of sample incubated). The NDF, OM, Pr and DM were different among weed forages used in this study. The equation of y = a+b (1-e-ct) was applied for degradability of DM. The constant (readily soluble fraction, 53.53%) of Convolvulus arvensis was higher but, the constant of Salsola kali was lowest (45.82%). The b constant (insoluble fraction but degradable in rumen) for Sorghum halepense (44.48%) was significantly higher than other treatments and the c constant (rate of degradation of b per hour) was significantly higher for Portulaca oleracea (0.089%). According to results from gas production and in situ techniques, it seems that the Sorghum halepense has a higher nutritive value than other treatments, but more experiments were required for accurate determination of nutritional values of these forages.
  M.A. Norouzian , R. Valizadeh , A. Nabipour , A.A. Naserian and A.M. Tahmasbi
  The effect of rearing system on rumen development and non-carcass characteristics of Balouchi lambs were studied. Twenty-four male lambs were used in a completely randomized design. Eight lambs remained with their mothers throughout the experiment (NR) and 16 lambs divided 2 groups, ARWF, starter without alfalfa and ARF, starter containing 15% alfalfa and were housed individually. Glucose and BUN were not different significantly (p>0.05) between groups. BHBA concentration was higher in artificial rearing whereas, NEFA was higher in natural rearing lambs. Neither DNA content and nor cell size were affected by rearing methods but RNA content and ribosomal Capacity (Cs) were affected by rearing system (p<0.05). ARWF lambs showed thickest keratinized layer than NR lambs and NR, thickest than the ARF but other rumen morphological characteristics were not affect by group. Differences between naturally and artificially reared lambs in EBW and non-carcass organs weight except stomach weight (EBW%) and stomach and omasum capacity were not significant (p>0.05). The results of this study showed that natural rearing lambs have minimum development of rumen.
  M.M. Moheghi , A.M. Tahmasbi , A.A. Naserian and A. Omid
  A study was made to evaluate the nutritional value of the Caraway-Seed Pulp (CSP) in concentrate component of the diet on the performance and blood metabolite of lactating Holstein cattle. Eight Holstein cattle (mean 40 days after calving) were allocated in 4 treatments based on Latin square design experiment. The treatments offered to animals were different levels of CSP, which substituted by Wheat Bran (WB) in concentrate by the following order: 0.0% CSP(100% WB-0.0% CSP as a control group); 33.3% CSP (66.7% WB, 33.3% CSP); 66.6% CSP (33.3% CSP+66.6% WB) and 100% CSP (0.0% WB+100% CSP). Nutrient composition in CSP based of DM were DM-37.6%, Protein-15.2%, fat-6%, NDF-55%, ADF-51% and Ash-14.5%. Overall feed intake was not statistically differ between treatments, however numerical improvement was observed in treatment 100% CSP compared to others although, the differences was not significant (p>0.05). The milk production and its composition results for all treatment was not significantly different (p>0.05). However, trend was to improve in milk fat by increasing CSP levels in diet with higher rate for treatment 100% CSP. Results obtained from blood metabolite analysis indicated that concentration of glucose was higher in treatment 0.0% CSP (control) compared to others, also, serum concentrate of SGOT and SGPT trended to increase by substitution of CSP in diet (p<0.05). Rumen N-NH3 and pH was not affected by any treatments. Obtain data from this study indicated that substitution of WB by CSP had not adverse effects on dairy cattle health and performance.
  E. Ibrahimi Khorram Abadi , A.M. Tahmasbi , M. Danesh Mesgaran and R. Valizadeh
  An experiment was carried out to evaluate protein degradability on animal performance, ruminal and blood metabolites and ruminal ecosystem. Eight multiparous Holstein cows were used in a change over design in four period. Supplemental protein which provided via Soybean Mal (SBM), Meat Meal (MM), urea were added to basal diet based on the providing same CP protein. Treatments were provided via Soybean Mal (SBM), Meat Meal (MM), urea and with flowing rumen degradability (T1: 74.5, T2: 70.4, T3: 68.7 and T4: 63.7%). Each experimental period was conducted for 21 days (14 days for adaptation and 7 days for sampling). There were no significant difference between treatments for DMI. However, trend indicates that by reduction of RDP in diet milk production decreases. No difference were observed for milk composition, body weight, pH and blood metabolites. Ruminal ammonia nitrogen was numerically higher for does fed T1 (9.25 vs 7.81, 6.94 and 7.98) and this trend was observed for blood urea nitrogen as well. Protozoa number was higher in does fed SBM with Urea.
  G.R. Ahooei , A.R. Foroughi , A.M. Tahmasbi , A.R. Shahdadi and R. Vakili
  To evaluate the effect of different levels of Dried Citrus Pulp (DCP) and urea on performance of fattening male calves, twenty Brown Swiss male calves (192.15±30 kg live weight and 196.3±24 days age) were housed in individual tie stalls and randomly allocated to four experimental diets as follows: without urea and DCP (control), 12% DCP+0% urea, 0% DCP+0.65% urea and 12% DCP+0.65% urea. The experimental diets consisted of 35% forage (corn silage) and 65% concentrate. The length of the trail was 100 days (15 days for adaptation and 85 days for experimental period). Data showed that experimental diets had significant effect on nutrients apparent digestibility (p<0.05). The dry matter and crude protein digestibility of diet four was higher than other diets. According to the results, the experimental diets had no significant effect on dry matter intake, average daily gain and feed to gain ratio (p>0.05). There was no significant difference in rumen pH but rumen N-NH3 was significantly differ between treatments (p<0.05). Calves were fed diet three significantly had the highest rumen N-NH3. Ruminating, eating and chewing of calves had no significant difference between treatments (p>0.05). Blood metabolites (glucose, triglyceride, urea nitrogen) were not significantly affected by experimental diets approximately 2 h after feeding. The experimental diets had no significant effect on carcass and liver weight (p>0.05). It seems that including of dried citrus pulp supplemented urea in the fattening male calves ration can improve dry matter intake, feed conversion ratio, average daily gain and increase nutrients apparent digestibility of Brown Swiss male calves.
  M.H. Ghaffari , A.M. Tahmasbi and M. Khorvash
  Effects of supplementary extruded oil seed on carcass characteristics and Conjugated Linoleic Acid (CLA) content of muscle in Mehraban male lambs were studied. The treatments included Control (C) diet C + 6% ECAS diet C + 6% ECOS diet C + 12% ECAS diet C + 12% ECOS diet C + 6% ECAS + 6% ECOS diet C + 12% ECAS + 6% ECOS diet C + 6% ECAS + 12% ECOS diet C + 12% ECAS + 12% ECOS diet C + 18% ECAS + 18% ECOS. About 60 Mehraban male lambs were used with the initial live weight of 34.3±2.12 kg and 5-6 months of age. The experimental period was 90 days and arranged in the completely randomized design. Carcass traits Dry Matter Intake (DMI) and CLA content in the muscle were significantly affected by different levels of ECOS and ECAS. There were linear and quadratic increments in the CLA content due to increasing in ECAS or ECOS from 0-12% of diet. Increasing of the ECOS and ECAS inclusion from 0-18% caused to increase in the CLA content but had negative influence on the carcass traits liver weight and DMI of lambs.
  M.J. Agah , H. Nassiri-Moghaddam , A.M. Tahmasbi and H. Lotfollahian
  An experiment was carried out to determine the influence of feeding different levels of Locally Produced Canola Seed (LPCS) on performance and fatty acid compositions of egg yolk lipid. In a completely randomized design, four treatments including control and three levels of whole canola seed (5, 10 and 15%) were fed to 108 laying hens (Hy-line w-36 at the age of 30 weeks) in four groups with three replications for 12 weeks. Fatty acid compositions of egg yolk were measured at the end of 41 weeks. Usage of LPCS in all levels decreased total amount of saturated fatty acid and the ratio of n-6 to n-3 of the yolk in comparison with control diet. The diets had significant effects on egg shell weight, haugh unit and yolk color index. With 15% LPCS in diet, significantly decreased daily haugh unit in comparison with control diet. Supplementation of LPCS >10% in diet resulted to decreased egg shell weight and yolk color comparing to control diet. There were significant differences in daily feed intake, egg production and egg mass. There was no difference in daily produced egg mass between levels of 5 and 10% LPCS in comparison with control diet (51.94 and 50.57 vs. 51.67). The using of 10% LPCS in diet had the best result between treatments due to better performance and ratio of n-6 to n-3 polyunsaturated fatty acid in egg yolk in comparison with control diet (8.28 vs. 16.94).
  B. Sadighian , A.A. Naserian , R. Valizadeh and A.M. Tahmasbi
  The objective of the present study was to evaluate the effect of ammoniated of sugar Beet Pulp (BP) by different levels of ammonia and water on in vitro gas production parameters. The samples were left treated with water (90 and 120% of BP) and ammonia 1-3% of BP. The gas production data were fitted using an exponential equation of P = b(1-e-ct) where b is the volume of gas produced, c is the fractional rate constant of gas production (/h), t is the incubation time (h) and P is the volume of gas produced at time t. The most cumulative gas production was for w90a1 in time 98 h incubation (68.5404 mL/200 mg of sample incubated). The chemical composition and parameters of OMD, ME SCFA and NEL were different among ammoniated sugar beet pulp used in this study.
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