The official journal of The Sri Lanka Veterinary Association
Sri Lanka Veterinary Journal (volume: 49(2))
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Volume - 49(2)
Year - 2002
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Section - A
Original Article
H.M.S.P. Herath1,  B. Sivayoganathan1  and  S. Dissanayake 1
1. Department of Animal Production and Health (Central Province), P.O. Box 29, Peradeniya

A RETROSPECTIVE STUDY ON THE REPRODUCTIVE PERFORMANCE OF COWS IN THE AGRO_ECOLOGICAL ZONES OF CENTRAL PROVINCE OF SRI LANKA 

H.M.S.P. Herath B.V.Sc., F.R.C.V.S., B. Sivayoganathan, B.V.Sc. and S. Dissanayake B.V.Sc.

Department of Animal Production and Health (Central Province), P.O. Box 29, Peradeniya

 

The purpose of the retrospective study on the reproductive performance of cows in different agro-ecological zones of the Central province in Sri Lanka was to see whether there is any significant difference in the performance of the upgraded and local dairy breeds registered under the Artificial Insemination programme.  Breeding records of two successive calving of 1584 cows which calved in 2000 were used for this study. Indices applied to measure the reproductive performance were Calving Interval (CI) and calving to Conception Interval (CCI).  The mean CI, and CCI for all the cows (n=1584) were 459 ± 100 days, and 178 ± 102 days respectively.  Thirty percent (30%) of these cows had CI of < 400 days.  The average CI of cows in Up Country (UC), Mid Country Wet Zone (MCWZ), Mid Country Dry Zone (MCDZ) and Intermediate Zone (IZ) were 418 ± 54 days (n=325), 459 ± 76 days (n=466), 508 ± 103 days (n=532) and 419 ± 89 days (n=261) respectively.  The average CI of the cows recorded as Friesian, Jersey, Ayrshire and indigenous breeds were 460 ± 99 (n=470), 453 ± 93 (n=420), 443 ± 92 (n=200), 428 ± 98 (n=103) days respectively.  CI of Frisian, Jersey and Ayrshire breeds were significantly longer compared to indigenous breed.

Significant differences in CI were seen between Friesian in the UC (421 ± 58 days) & MCWZ (478 ± 104 days) and Jersey in IZ (419 ± 89 days) & MCWZ (459 ± 76 days).  The CI for all cows, regardless of breed, showed significant differences between MCDZ (508 ± 103 days) and UC (418 ± 54 days).  This was same for the MCDZ (508 ± 103 days) and MCWZ (459 ± 76 days).  The study highlights the absence of a change in the average CCI of 450 days observed in the Central Province ten years before, which indicates that various dairy production improvement programmes have failed to improve the reproductive performance of dairy cows.

S.L.Vet.J. 2002, 49(2A): 1-6

Short Communication
S. Gajanayake1
1. Department of Animal Production & Health, Peradeniya

UTILIZATON OF CALVES BORN THROUGH ARTIFICIAL INSEMINATION AT TALATHUOYA VETERINARY SURGEON\\\'S RANGE

S. Gajanayake, B.Sc.(Agri.), M.Sc.(Agri.)

Department of Animal Production & Health, Peradeniya

In the study of methods of utilization of calves born through artificial insemination, it was observed that 43% of calves were retained in the farms and 29% were sold to middlemen from other agro-ecological zones such as intermediate and dry zones of Sri Lanka. Calf mortality rate in male calves (62%) was higher than that of females (38%). The tendency to keep heifer calves (73%) in the farm was higher than that of male (27%) calves.

S.L.Vet.J. 2002, 49(2A): 7-9

Section - B
News

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Prof. S. T. Fernando Memorial Lecture
S.N. Arseculeratne1
1. Department of Microbiology, Faculty of Medicine, University of Peradeniya

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Abstracts

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Reports
A. Dangolla1
1. Department of Veterinary Clinical Science, Faculty of Veterinary Medicine & Animal Science, University of Peradeniya, Sri Lanka

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R. Hettiarachchi1
1. Department of Animal Production and Health, Peradeniya, Sri Lanka

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