The influences of age on lactation length and milk yield in Kenana and Butana cows

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Milk yield performances in Kenana and Butana cows were examined to determine the influence of age on production. The mean milk yields for the Kenana and Butana herds were 2136 ± 168 and 1807 ± 592 kg produced in a mean lactation period of 283 ± 40 days and 283 ± 57 days respectively. In both herds the maximum lactation milk yield was attained in the third lactation. Kenana cows between 6½ - 7½ years of age and Butana cows between 5½ - 6½ years of age attained the maximum lactation milk yield.

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cattle, breeds, lactation, milk yield, maturity

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http://hdl.handle.net/123456789/170500

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https://hdl.handle.net/10568/66859

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