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Pakistan Journal of Biological Sciences
Year: 2001  |  Volume: 4  |  Issue: 7  |  Page No.: 902 - 905

Evaluation of the Performance of Different Dairy Breeds Feeding Urea Treated Rice Straw Based Similar Diet

Md. Abdur Rashid, Md. Shahadat Hossain and M.H. Kawsar    

Abstract: The objective of the investigation was to evaluate the performance of different dairy breeds offered same ingredient, same amount of concentrate mixture and almost same amount of roughage under farm condition. Nine mid-lactating cows of three different dairy breeds were grouped into 3 diet treatments according to their genotype, T1 (Pabna breed), T2 (Sindhi cross) and T3 (Jersey cross). Average daily dry matter (DM) intake by the cows fed on T3 diet (7.23) was slightly higher than that of cows fed on diet T2 (7.20) or T1 (7.18). T3 treatment group showed higher (p<0.01) milk production (5.0) followed by T2 (3.71) and then T1 (2.78). The live weight gain (kg d-1) was highest (0.232) in Jersey cross (T 3) and lowest (0.134) in Pabna cows (T1). The difference of weight gain among different treatment groups was statistically significant. Specific gravity of milk of T2 (1.031) and T3 (1.031) groups were similar but non-significantly higher than T1 (1.029). The production of total solids (g kg-1) was higher in T1 group (139.90) than other two groups but the difference was statistically non-significant. The cows of T1 group produced significantly higher solids-not-fat (88.53 g kg-1) in their milk than other two groups. Fat production by Pabna cows (T1) was non- significantly about 4.7 and 8.2% higher than that of other two groups T2 & T3 respectively. Milk protein present in Pabna cows milk (38.10 g kg-1) was comparatively higher than that of T3 (37.78) or T2 (37.57) cows. The energy value (3.57) of milk of Pabna cows was also non-significantly higher than that of T2 (3.45) and T3 (3.33). Lowest feed cost for per liter milk production (Tk. 6.10) was found in Jersey cross (T3) and highest (Tk. 10.88) in Pabna cross (T1). There was much difference in the values of per liter milk production among the treatment groups.

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