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Articles by M. Shahjalal
Total Records ( 3 ) for M. Shahjalal
  M. Atiqur Rahman , A.M.M. Nurul Alam and M. Shahjalal
  An experiment was conducted to investigate the effects of supplementation of Urea-Molasses-Straw (UMS) based diet with different levels of concentrate for fattening emaciated bulls. The unsupplemented control diet T0 was composed of UMS (80%) and green grass (20%). In the treatment diets T1, T2 and T3 concentrate mix was added at 10, 20 and 30% of DM requirement, respectively to replace the same amounts of UMS and green grass. There was significant (p<0.01) difference in average DM intake, which were 3.42, 4.65, 4.79 and 5.14 kg for T0, T1, T2 and T3, respectively. The animals fed supplemented diets T3, T2 and T1 gained significantly (p<0.01) higher live weight (56.0, 46.0 and 40.0 kg, respectively) and had better feed conversion ratio (6.58, 7.34 and 8.22, respectively; non-significantly) than the animals fed on T0 (Live weight gain 11.0 kg and feed conversion ratio 21.95). There was a tendency to increase nutrient digestibility with increased levels of concentrate supplementation. The highest cost for each kg meat production was recorded for diet T0 (Tk. 143.45) followed by diets T3 (Tk. 75.67), T2 (Tk. 72.91) and the lowest was recorded for diet T1 (Tk. 68.73).
  H.M Salim , M. Shahjalal , A.M.M. Tareque and N. Akter
  Six females each of sheep and goats aged about 6 mo and weighing, on average, 9.8 and 9.77 kg, respectively were used to investigate the effect of concentrate supplementation on intake and growth performance under grazing condition. A grazing land was developed and all the goats and sheep were allowed to graze for 7 h daily with or without supplementary concentrate feeding in a 2 x 2 factorial experiment. Herbage yield and composition during experimental period were determined in this study. The average herbage yield recorded in the month of September was significantly (P<0.01) higher than that harvested either in June or December. Major grass species identified in the grazing land were A. compressus (39%), I. cylindrica (24%), P. repens (18%), C. dactylon (13%) and C. rotundus (6%). The highest CP content was observed in C. rotundus (12.27%) and lowest was recorded in. I. cylindrica (9.8%). Grazing intake estimate by either grass harvesting method (0.41 vs 0.28 kg) or animal weight gain method (0.26 vs 0.23 kg) indicated that sheep consumed significantly (p<0.05) higher amount of herbage DM than goats. However, apparent digestibility of all proximate components of herbage did not differ significantly between sheep and goats. Significantly (p<0.05 to p<0.01) higher live weight gain (16.59 vs 3.94 g d‾1) and total DM intake (457.7 vs 253.0 g d‾1) were observed in supplemented group than those of control group but there were no differences between sheep and goats for live weight gain (8.59 vs 11.80 g d‾1) and DM intake (371.0 vs 339.7 g d‾1). The results showed that concentrate supplementation improved growth rate and therefore, feeding of grazing goats and sheep with concentrate supplement may be suggested to optimize growth performance. Moreover, supplementation may be necessary to maintain body condition during the winter season particularly between December and January when the pasture quantity is inadequate in the grazing land.
  F. Kabir , M. Shahjalal , S. A. Chowdhury , J. Alam and M. R. Islam
  The effect of protein supplementation was studied on growth and reproductive performance in female goats and sheep under grazing condition. Ten does and six ewes aged about 15 months and weighing on average 13.9 and 14.4 kg respectively were studied for 112 days. Animals were allocated to two feeding regimes [low protein (LP), 168g and high protein (HP), 208g per kg DM] according to live weight. Supplemental feed contained wheat bran, rice polish and soybean meal (LP-43: 43:14 & HP-35: 35:30, 300 g/d). HP diet non significantly (P>0.05) decreased the DM intake in goats. Moreover, significantly (P<0.05) increased live weight gain was observed in goats receiving HP diet. In contrast, sheep receiving the HP diet significantly (P<0.05 to P<0.01) improved DM intake and live weight gain compared with those given LP diet. Average birth weight of kids (0.85 vs. 0.75 kg) and lambs (1.10 vs. 0.83 kg) were higher in both species that received the HP diet than those given the LP diet. Subsequently daily average live weight gain in kids received the HP diet was higher (62.4 vs. 45.4 g/d) than those fed the LP diet up to weaning. These results showed that the effect of supplementing high protein to grazing improved the growth and reproductive performance of goats and sheep.
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