Results 11 to 20 of about 6,252 (157)
Environmental Factors Affecting Some Productive and reproductive Traits in Egyptian Buffaloes [PDF]
Benha Veterinary Medical Journal, 2017 This study was conducted to evaluate the effect of some environmental factors on milk production in Egyptian buffaloesand the effect of parity and season of calving on calving interval and days open.
Darwish A. +3 more
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Animal, 2013 The effects of first calving (FC) in Holstein heifers on their first lactation, second lactation and lifetime milk production were examined from an initial database of 459 743 animals that first calved between 1 January 1990 and 31 July 2010 in Wallonia,
E. Froidmont +5 more
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JDS Communications, 2021 Within seasonal dairy systems, cows that calve late in the calving season are less likely to become pregnant and maintain a yearly calving interval. Very few studies have examined effective strategies for reproductive management of these late-calving ...
S.G. Moore +7 more
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Scientific Papers Animal Science and Biotechnologies, 2023 Is generally known there is antagonistic relationship between production and reproduction traits. We observed this relationship in dataset of 1 197 478 daily milk records of Holstein cows on the first lactation only, first time calved during years 2003 ...
Zuzana Riecka, Juraj Candrák
doaj
Prolonged Calving Intervals in the Nili Ravi buffalo
Italian Journal of Animal Science, 2010 The optimal calving interval for dairy buffaloes is found to be 12 to 13 months. The losses due to prolonged calving interval are amounted to one USA dollar per extra day of optimal calving interval.
S. Nasir Hussain Shah
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Ages at Calving and Calving Intervals for Dairy Cattle in the United States
Journal of Dairy Science, 1989 Abstract Calving ages and intervals for cows first calving in 1966 to 1986 were examined for five dairy cattle breeds. For parities one through seven, mean age at each parity was lowest for Jerseys and highest for Ayrshires and Brown Swiss. Registered cows usually were older than grades for a specific parity.
Nieuwhof, G.J. +2 more
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Scientific Papers Animal Science and Biotechnologies, 2023 The aim of this paper was to study the influence of calving interval on the number of somatic cells from milk in Romanian Black and White cows. The study was conducted on a total of 125 lactations from 92 cows.
Simona Baul +7 more
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RESEARCH ON THE INFLLUENCE OF THE CALVING INTERVAL ON MILK YIELD [PDF]
Scientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development, 2014 The paper goal was to study the influence of the calving interval on milk yield for the Romanian Brown breed, using 950 lactations, of which: 573 lactations (60.31 %) belonged to the over 400 days calving interval and 377 lactations (39.69%) belonged to ...
Agatha POPESCU
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Analysis of non-genetic factors affecting calving difficulty in the Czech Holstein population
Czech Journal of Animal Science, 2008 The objective of this study was to analyze the effects of non-genetic factors affecting calving difficulty in the Holstein population of the Czech Republic for subsequent compilation of the model for genetic evaluation as well as for herd management ...
M. Fiedlerová +7 more
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The effects of maternal calving date and calving interval on growth performance of beef calves
South African Journal of Animal Science, 2000 This study was undertaken to investigate the growth performance of calves born to dams with different calving dates and calving intervals. Early calving dams produced calves with the lowest birth weights, the highest actual weaning weights and the highest pre-breeding heifer weights.
MacGregor, R.G., Casey, N.H.
openaire +3 more sources