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Articles by M. Alikhani
Total Records ( 3 ) for M. Alikhani
  G. R. Ghorbani , D. Kianzad , M. Alikhani and A. Nikkhah
  High Ambient Temperatures (AT) would be an additional pressure on early-lactation cows already undergoing physiological and metabolic adaptations of early-lactation. Methionine is the initiator amino acid in any polypeptide biosynthesis. The high AT can stimulate the synthesis of specific proteins by the immune system to maintain cell integrity. The high AT was hypothesized to increase maintenance methionine requirements in dairy cattle already facing large methionine demands of early-lactation. The primary objective was to determine the effects of a Rumen-Protected Met (RPM) product (SmartamineMTM) on productivity and estrous expression visibility in early-lactation dairy cattle under high AT. Ten second-calf and fifteen third- and fourth-calf Holstein cows were grouped based on parity, previous milk production records and body condition score. Cows within each group were randomly assigned to either a control (n = 13) or a RPM treatment (n = 12) at 2 week prepartum and monitored through 14 week in milk. The cows were housed in loose stalls receiving 12 g daily RPM from 2 week prepartum to 2 week postpartum and 17 g RPM from 3 week through 14 week postpartum. The control cows received the same diets but without RPM. Body condition was scored at -14, 25, 60 and 110 day of calving. The visibility of estrous expression was scored on the basis of standing and mounting activities with the scorers blind to the treatments. The average maximum daily AT was 42°C in August. Across the experimental weeks, RPM increased (p<0.01) milk contents of protein, lactose and SNF in all cows. The RPM increased (p = 0.04) milk protein yield and tended (p = 0.09) to increase milk yields of energy and fat in second-calf cows but not in older cows. In addition, feeding RPM improved (p = 0.05) visibility of estrous expression across parities. Analysing the polynomial coefficients of individual lactation curves suggested that RPM-fed cows had a more persistent milk yield than control cows (p = 0.05). Results demonstrated that RPM can benefit early-lactation dairy cattle under high ambient temperatures.
  G.R. Shadnoush , M. Alikhani , H.R. Rahmani , M.A. Edriss , A. Kamalzadeh and M. Zahedifar
  About 48 Lori-Bakhtiari lambs were used to measure the effects of restricted feeding and re-feeding on intake, body weight and development of body organs. The feeding management was divided to Feed Restriction Period (FRP) and Re-alimentation Period (RAP). During FRP, the 18 Control (C) animals were fed a low-quality roughage, ad libitum and 40 g kg BW-0.75 day-1of concentrate and the 30 animals were only fed low-quality roughage as the Restricted (R) group. At the end of FRP and RAP, six lambs of each group were slaughtered. In the RAP, the 24 remaining lambs from restricted treatment were divided into two groups of R1 and R2 and received low-quality roughage plus 40 and 48 g kg BW-0.75 day-1, of concentrate, respectively. During FRP, Dry Matter (DMI), Metabolizable Energy (MEI) and Crud Protein Intake (CPI), Daily Gain (ADG), Final Body Weight (FBW), pelt, liver and kidneys of C group were higher (p<0.05) than R group. In the RAP all groups had similar FBW but feed conversion ratio, DMI, MEI, CPI and weights of all body organs of C group were higher (p<0.05), however ADG was lower (p<0.05) than R1 and R2 groups. In general, restricted feeding following re-feeding lambs caused more efficiency of performance which was associated with lower maintenance requirements.
  M. Alikhani and G. Emtiazi
  Twenty Naieni breed replacement ewe lambs were used to determine the substitution effects of treated wheat straw with exogenous fiber-degrading enzymes for alfalfa hay on wool characteristics. Five treatment diets were included: 1) control (100% alfalfa hay without wheat straw), 2) 10% enzyme treated wheat straw replaced for alfalfa hay, 3) 20% enzyme treated wheat straw replaced for alfalfa hay, 4) 30% enzyme treated wheat straw replaced for alfalfa hay and 5) 30% untreated wheat straw replaced for alfalfa hay. Final fleece weight, and fleece weight index; wool production per day, feed conversion to wool; final staple length, wool and hair crimp per centimeter of length, percent of heterotype, coronal, kemp, reticulate and imbricate fibers and accumulation of scales in 100 μm fiber lengths were not affected by replacing treated wheat straw for alfalfa hay, but feeding untreated wheat straw tended to decrease final fleece weight, wool production, and final staple length. Replacing 20%, and 30% treated, and 30% untreated wheat straw for alfalfa hay numerically increased mean final diameter of fiber. The results of this experiment indicated that treated wheat straw with exogenous fiber-degrading enzymes can be replaced for alfalfa hay in Naieni replacement ewe lamb diets.
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