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Journal of Biological Sciences

Year: 2002 | Volume: 2 | Issue: 4 | Page No.: 205-207
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Authors

M. N. Islam

M. N. Islam

M. M. Rahman

S. Faruque

Keywords

Research Article

Reproductive Performance of Different Crossbred and Indigenous Dairy Cattle Under Small Holder Farming Condition in Bangladesh

M. N. Islam, M. N. Islam, M. M. Rahman and S. Faruque
In the study areas records of 100 dairy cows collected from small holder dairy farms out of which were 20 Friesian cross, 19 Sahiwal cross, 29 Sindhi cross, 32 indigenous dairy cows. Those dairy farm were considered to evaluate post partum heat period, dry period, services per conception (SPC), age at first calving, calving to first service, lactation period and calving interval. The average post partum heat period of Friesian cross, Sahiwal cross, Sindhi cross and indigenous dairy cows were 98.75 ± 40.58, 97.63 ± 36.03, 114.65 ± 21.54 and 108.46 ± 36.32 days, respectively and the average length of dry period were 127 ± 46.66, 136.05 ± 23.42, 138.39 ± 41.78 and 170.00 ± 68.89 days, respectively. The average services per conception for Friesian cross, Sahiwal cross, Sindhi cross and indigenous dairy cows were 1.65 ± 1.65, 2.05 ± 1.17, 2.206 ± 1.01 and 1.41 ± 0.56, respectively and age at first calving were 36.25 ± 3.48, 37.26 ± 3.01, 37.65 ± 5.21 and 40.03 ± 3.54 months, respectively. Calving to first service of different crossbred and indigenous dairy cows were 109+ 37.26, 114.47 ± 38.89, 113.10 ± 27.20 and 124.53 ± 43.33 days and calving interval were 373.25 ± 35.25, 383.42 ± 34.44, 397.77 ± 37.07 and 418.78 ± 36.74 days, respectively. The length of lactation period of different crossbred and indigenous dairy cows was 253 ± 24.73, 256.31 ± 24.31, 255.86 ± 27.58 and 230.62 ± 30.68 days, respectively. The post partum heat period and calving to first service did not differ significantly among the different crossbred and indigenous dairy cows. The traits like, services per conception, age at first calving, calving interval and lactation period however differed highly significantly (P<0.01). The dry period also significantly (p<0.05) different among the genetic groups. The results obtained in this study indicated the reproductive performances of crossbred cows were superior to indigenous cows.
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