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2020•Czech Journal of Animal ScienceOpen access

Impact of calving interval on milk yield and longevity of primiparous Estonian Holstein cows

Aadi Remmik, Rando Värnik, Kalle Kask

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Abstract

Data about 4 474 high-yielding Estonian Holstein dairy cows from 14 herds was analysed for the impact of the first calving interval length (CI 1 ) on milk yield (MY) and lactation persistency.The results show that cows with CI 1 shorter than 12 months have on average 2 345 kg lower milk yield in the first 1 000 days of productive lifetime than those with CI 1 between 14 and 16 months.This is caused by lower MY in both the first and the second lactation as well as higher probability of being culled before reaching 1 000 days of productive life.

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Data about 4 474 high-yielding Estonian Holstein dairy cows from 14 herds was analysed for the impact of the first calving interval length (CI 1 ) on milk yield (MY) and lactation persistency.The results show that cows with CI 1 shorter than 12 months have on average 2 345 kg lower milk yield in the first 1 000 days of productive lifetime than those with CI 1 between 14 and 16 months.This is caused by lower MY in both the first and the second lactation as well as higher probability of being culled before reaching 1 000 days of productive life.

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Available abstract

Data about 4 474 high-yielding Estonian Holstein dairy cows from 14 herds was analysed for the impact of the first calving interval length (CI 1 ) on milk yield (MY) and lactation persistency.The results show that cows with CI 1 shorter than 12 months have on average 2 345 kg lower milk yield in the first 1 000 days of productive lifetime than those with CI 1 between 14 and 16 months.This is caused by lower MY in both the first and the second lactation as well as higher probability of being culled before reaching 1 000 days of productive life.

Key concepts: Lactation, Ice calving, Herd, Animal science, Longevity, Biology, Holstein Cattle, Dairy cattle

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