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Non-genetic factors affecting milk and fat yields of Friesian cows subjected to a seasonal calving system in the 10th region. 2. Effects of age, parity, service period and dry period



Non-genetic factors affecting milk and fat yields of Friesian cows subjected to a seasonal calving system in the 10th region. 2. Effects of age, parity, service period and dry period



Avances en Produccion Animal 9(1-2): 99-108



Data on 550 lactations of 257 Friesian cows in Chile were analysed. Age of cow had a significant effect on milk yield (ranging from 2317 kg for cows aged 2 yr to 3086 kg for cows aged >5 yr), lactation length (ranging from 255 days for cows aged 2 yr to 269 days for cows aged >5 yr), and persistency of milk yield (ranging from 64.7% for cows aged >5 yr to 68.3% for cows aged 2 yr).

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Accession: 001417499

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