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Calving season and fertility in cattle



Calving season and fertility in cattle



Lucrari Stiintifice, Institutul de Cercetare si Productie pentru Cresterea Bovinelor (10): 35-43



Data were obtained on 1052 calvings over a 2-yr period. Seasonal distribution of calvings (winter, spring, summer and autumn) was 33.6, 31.7, 21.1 and 13.6% resp. in the 1st yr, and 25.7, 39.9, 22.3 and 13.1% in the 2nd. The av. milk yield was 3650 kg in the 1st yr, and 3078 in the 2nd. Milk yield (as a percentage of the overall average) of cows calving in the 4 seasons was 104.6, 89.5, 103.1 and 108.4 resp. in the 1st yr, and 101.3, 96.5, 99.8 and 105.6 in the 2nd.

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