volume 42 issue 3 (september 2008) : 186-190
LIFETIME PERFORMANCE OF RATHI CATTLE AT AN ORGANIZED FARM
1Department of Livestock Production and Management,
College of Veterinary and Animal Science, RAU, Bikaner-334 001, India.
ABSTRACT
The performance records of 207 lactations of 59 Rathi cows were studied and it was
found that Lifetime milk yield (LTMY), lactating life, productive life, milk yield per day of
lactating life (MYPDLL), Milk yield per day of productive life upto start of next lactation
(MYPDCI), milk yield per day of productive life upto termination of last lactation (MYPDLI),
breeding efficiency (B.E) and age at first calving (AFC) averaged 6490.59±3107.50 lts,
1160.06±483.37 days, 1720.76±720 days, 5.48±0.68 lts, 3.71±0.65 lts, 4.07±0.65 lts,
75.13±9.26% and 1482.00±314.07 days, respectively. period of calving (POC) had
significant effect (P0.05) for productivelife only whereas season of calving (SOC) had
significant (P0.05) effect or LTMY only. The linear regression coefficient of LTMY on
AFC was significant (P0.05). The phenotypiccorrelations among production efficiency
traits were positive, moderate to high in magnitude and significant (P
found that Lifetime milk yield (LTMY), lactating life, productive life, milk yield per day of
lactating life (MYPDLL), Milk yield per day of productive life upto start of next lactation
(MYPDCI), milk yield per day of productive life upto termination of last lactation (MYPDLI),
breeding efficiency (B.E) and age at first calving (AFC) averaged 6490.59±3107.50 lts,
1160.06±483.37 days, 1720.76±720 days, 5.48±0.68 lts, 3.71±0.65 lts, 4.07±0.65 lts,
75.13±9.26% and 1482.00±314.07 days, respectively. period of calving (POC) had
significant effect (P0.05) for productivelife only whereas season of calving (SOC) had
significant (P0.05) effect or LTMY only. The linear regression coefficient of LTMY on
AFC was significant (P0.05). The phenotypiccorrelations among production efficiency
traits were positive, moderate to high in magnitude and significant (P
KEYWORDS
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