Shamim
Comparative Reproductive Efficiency Amonth Imported Holstein Friesian, Farm Bron Pure Bred Holstein Friesion And Sahiwal cows - 1988
The present study aimed at comparative performance of Sahiwal and Holstein Friesian animals under sub-tropical environmental conditions of Pakistan. The breeding records of 152 Sahiwal and 114 Holstein Friesian (90 Imported Holstein Friesian and 24 dauhters of originally imported animals kept at Harichand) cows were studied during 1978-82. An effort was also made to study the influence of some of the environmental factors on the parameters of reproductive traits. The main salient features of some of the economic traits studied are summarised as follows:
1) Imported, Local born Holstein Friesian and Sahiwal cows matured at 571.16 ÷ 14.13, 689.25 ± 32.74 and 937.27 ± 17.3 days while these heifers calved for the first time at the age of 855.98 ± 15.49, 989.25 + 31.95 and 1354.86 ± 17.72 days, respectively. The data indicate that Imported Holstein Friesian matured at an early age as compared to their daughters and Sahiwal (118-366 days), further Imported heifers calved 134 and 499 days earlier than local born Holstein Friesian and Sahiwal cows.
2) The number of services requiredpei'' conception was 1.47 + 0.054, 1.32 + 0.09 and 2.50 ± 0.09 for Imported Holstein Friesian, their progenies and Sahiwal. The results revealed that more number of services were required for conception in Sahiwal than the other two groups(1.03 to 1.18).
3) The average service period of Imported Holstein Friesian, Farm-born and Sahiwal were found to be 134.18 ± 16.72, 121.03 ± 12.09 and 153.53 ± 15.22 days which shows 13 and 32 days early conception after parturition in Farm-born than Imported Holstein Friesian and Sahiwal cows. Calving season has not affected this trait significantly.
4) The gestation length for Imported Holstein Friesian,their daughters and Sahiwal averaged 278.66 ± 1.21, 282.38 ± 2.38 and 287.86 ÷ 0.61 days, respectively. The data indicate that on an average Sahiwal cows carry their calves 9.20 and 5.48 days more than Imported and Farm-born Holstein Friesian. Season - hEd nc significant affect on Gestation length.
5) The overall average length of calving interval was 411.41 ÷ 17.56, 382.71 ÷ 11.52 and 441.05 ÷ 15.7 days in Imported Holstein Friesian,their progenies and Sahiwal cows. Minimum and Maximum inter-calving period was observed in Farm born and Sahiwal cows. Maximum calving occured in Winter, Autumn and Spring in Imported, Farm-born and Sahiwal while the minimum calving was observed in Summer and Autumn correspondingly.
6) The average lactation length was 323.91, 310.4 and 274.72 days in Imported Holstein Friesian,their daughters and Sahiwal
cows showing 49.19 and 35.68 days shorter duration of Sahiwal than Imported and Farm-born Holstein Friesian,respectively.
7) Milk production of 305 days was 3608.05, 3574.6 and
1727.42 litres respectively. The result revealed that Imported
Holstein Friesian produced significantly more milk than their
contemporary.
8) The dry period averaged 72.51 ÷ 8.76, 81.76 ± 7.15 and
175.35 ÷ 13.61 days in Imported Holstein Friesian,their progenies and Sahiwal while post-partum oestrous period was found to
be as 94.42 ± 10.19, 102.39 ± 10.71 and 93.3 ± 7.45 days correspondingly.
9) The sex ratio of males and females was 59.15:40.85, 67.13 : 32.69 and 57:43 in Imported Holstein Friesiañ, Farm-born and Sahiwal, while culling and mortality percentage was 33.33 and 18.88 in Holstein Friesian while the corresponding figures for Sahiwal 43.42 and 1 .13 per cent.
10) The reproductive efficiency of Imported Holstein Friesian, Farm-born and Sahiwal cows averaged 88.83 ± 1.95, 88.56 ± 2.7 and 85.36 ÷ 14.27 percent respectively. The analysis of variance showed non significant difference in the reproductive efficiency of all the three groups.
Although milk production is higher than Sahiwal, however heigh incidence of mastitis and mortality were the major problems in Holstein Friesian. Further Improvement can be made through controlling mortality and mastitis. To import the exotic breeed in N.W.F.P. was the first attempt, so furthrer investigations are required to draw conclusions on the performance of their crosses with non-descriptive cattle breeds in N.W.F.P. under rural conditions.
Department of Theriogenology
1132,T
Comparative Reproductive Efficiency Amonth Imported Holstein Friesian, Farm Bron Pure Bred Holstein Friesion And Sahiwal cows - 1988
The present study aimed at comparative performance of Sahiwal and Holstein Friesian animals under sub-tropical environmental conditions of Pakistan. The breeding records of 152 Sahiwal and 114 Holstein Friesian (90 Imported Holstein Friesian and 24 dauhters of originally imported animals kept at Harichand) cows were studied during 1978-82. An effort was also made to study the influence of some of the environmental factors on the parameters of reproductive traits. The main salient features of some of the economic traits studied are summarised as follows:
1) Imported, Local born Holstein Friesian and Sahiwal cows matured at 571.16 ÷ 14.13, 689.25 ± 32.74 and 937.27 ± 17.3 days while these heifers calved for the first time at the age of 855.98 ± 15.49, 989.25 + 31.95 and 1354.86 ± 17.72 days, respectively. The data indicate that Imported Holstein Friesian matured at an early age as compared to their daughters and Sahiwal (118-366 days), further Imported heifers calved 134 and 499 days earlier than local born Holstein Friesian and Sahiwal cows.
2) The number of services requiredpei'' conception was 1.47 + 0.054, 1.32 + 0.09 and 2.50 ± 0.09 for Imported Holstein Friesian, their progenies and Sahiwal. The results revealed that more number of services were required for conception in Sahiwal than the other two groups(1.03 to 1.18).
3) The average service period of Imported Holstein Friesian, Farm-born and Sahiwal were found to be 134.18 ± 16.72, 121.03 ± 12.09 and 153.53 ± 15.22 days which shows 13 and 32 days early conception after parturition in Farm-born than Imported Holstein Friesian and Sahiwal cows. Calving season has not affected this trait significantly.
4) The gestation length for Imported Holstein Friesian,their daughters and Sahiwal averaged 278.66 ± 1.21, 282.38 ± 2.38 and 287.86 ÷ 0.61 days, respectively. The data indicate that on an average Sahiwal cows carry their calves 9.20 and 5.48 days more than Imported and Farm-born Holstein Friesian. Season - hEd nc significant affect on Gestation length.
5) The overall average length of calving interval was 411.41 ÷ 17.56, 382.71 ÷ 11.52 and 441.05 ÷ 15.7 days in Imported Holstein Friesian,their progenies and Sahiwal cows. Minimum and Maximum inter-calving period was observed in Farm born and Sahiwal cows. Maximum calving occured in Winter, Autumn and Spring in Imported, Farm-born and Sahiwal while the minimum calving was observed in Summer and Autumn correspondingly.
6) The average lactation length was 323.91, 310.4 and 274.72 days in Imported Holstein Friesian,their daughters and Sahiwal
cows showing 49.19 and 35.68 days shorter duration of Sahiwal than Imported and Farm-born Holstein Friesian,respectively.
7) Milk production of 305 days was 3608.05, 3574.6 and
1727.42 litres respectively. The result revealed that Imported
Holstein Friesian produced significantly more milk than their
contemporary.
8) The dry period averaged 72.51 ÷ 8.76, 81.76 ± 7.15 and
175.35 ÷ 13.61 days in Imported Holstein Friesian,their progenies and Sahiwal while post-partum oestrous period was found to
be as 94.42 ± 10.19, 102.39 ± 10.71 and 93.3 ± 7.45 days correspondingly.
9) The sex ratio of males and females was 59.15:40.85, 67.13 : 32.69 and 57:43 in Imported Holstein Friesiañ, Farm-born and Sahiwal, while culling and mortality percentage was 33.33 and 18.88 in Holstein Friesian while the corresponding figures for Sahiwal 43.42 and 1 .13 per cent.
10) The reproductive efficiency of Imported Holstein Friesian, Farm-born and Sahiwal cows averaged 88.83 ± 1.95, 88.56 ± 2.7 and 85.36 ÷ 14.27 percent respectively. The analysis of variance showed non significant difference in the reproductive efficiency of all the three groups.
Although milk production is higher than Sahiwal, however heigh incidence of mastitis and mortality were the major problems in Holstein Friesian. Further Improvement can be made through controlling mortality and mastitis. To import the exotic breeed in N.W.F.P. was the first attempt, so furthrer investigations are required to draw conclusions on the performance of their crosses with non-descriptive cattle breeds in N.W.F.P. under rural conditions.
Department of Theriogenology
1132,T