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Articles by M.A. Mirza
Total Records ( 2 ) for M.A. Mirza
  Usmani R.H. and M.A. Mirza
  Data recorded in respect of postpartum estrous activity and fertility of a herd of Nili-Ravi buffaloes maintained at the Livestock Research Station of the National Agricultural Research Centre, Islamabad, were analyzed to examine the effects of parity and month of calving. During the study period of two years (1998 to 1999) a total of 103 buffaloes calved at the research station. Mean values for the overall interval to first postpartum observed estrus (PPIE), first service conception rate (RSCR), services per conception (SPC) and postpartum interval to conception (PPIC) were 84.4±8.6 days, 53.4%, 1.7±0.12 and 104.7±15.3 days, respectively. The PPIE and PPIC were shorter for buffaloes in lactation number 7 or more than for those in lactation number 1 to 6. Buffaloes calving during the months of September had shortest PPIE and PPIC (43.7±8.4 and 51.8±9.6 days, respectively) and lowest number of SPC (1.2±0.1). Highest FSCR 82% was observed for buffaloes calving during the month of August. Buffaloes calving during the month of March had the longest PPIC (211.7±15.6 days) and highest number of SPC (2.8±0.3). Lowest FSCR (0%) was observed for buffaloes calving during the months of February to April. In conclusion, the buffaloes which calved towards the end of peak calving season (August to December) were most efficient in terms of postpartum reproduction and fertility.
  M. Afzal , M. Anwar , M.A. Mirza and S.M.H. Andrabi
  This study was conducted to compare the effect of open grazing system and feeding green fodder at the stall (cut and carry system) on the growth of male buffalo calves. Twelve male buffalo calves (of Nili Ravi breed) were either grazed (n = 5) on natural pasture or were offered seasonal green fodder ad lib in the manger (n = 7). The calves were kept on these treatments for 9 months. Live body weight of the calves was recorded at the start of trial and then fortnightly. The overall weight gain per day over nine months of feeding period did not differ significantly between open grazing (0.415±0.028kg) and stall fed groups (0.433±0.056kg) (P > 0.05). It is concluded that grazing on natural pasture may result in growth of male buffalo calves comparable to that after feeding them cultivated green fodder at the manger.
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