Correlation between Energy Balance and Fertility in Finnish Dairy Cows
نویسندگان
چکیده
منابع مشابه
Interrelationships between Productivity and Fertility in Dairy Cows
Eighty eight Friesian cows and heifers were fed one of four complete diets based on maize silage and containing increasing levels of grain (from 0 to 500 g DM/kg diet DM), in two trials. Days from calving to first observed oestrus and to conception were recorded as were yields of milk and milk fat and live weight changes during early lactation. In the second trial, complete lactation data were ...
متن کاملNutrition and fertility in dairy cows.
Introduction It is now widely recognised that reduced fertility in dairy herds is one of the most important factors affecting producer profitability. Roche (2006) has defined the effect of infertility on profitability as: (i) prolonged calving interval with fewer calves and less milk per cow; (ii) increased replacement costs; (iii) increased labour, semen and veterinary bills; and (iv) an exten...
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The biological cycles of milk production and reproduction determine dairying profitability thus making management decisions dynamic and time-dependent. Diseases also negatively impact on net earnings of a dairy enterprise. Transition cows in particular face the challenge of negative energy balance (NEB) and/or disproportional energy metabolism (fatty liver, ketosis, subacute, acute ruminal acid...
متن کاملFertility in dairy cows: bridging the gaps.
Dairy cattle are an integral part of agriculture worldwide, providing many products in addition to milk for the human population. The efficient production of these products is of utmost importance and high reproductive performance is absolutely crucial to this. In September 1999, Dr Michael Diskin led a committee (Dr Joseph M. Sreenan, Prof James Roche, Prof Maurice Boland and Dr Diarmuid O’Cal...
متن کاملFertility in High Yielding Dairy Cows
Introduction Genetic progress coupled with improved nutritional management has resulted in many more cows that can produce over 8,500 litres per 305 day lactation. This upward trend in production over the past 30 years has been accompanied by a steady decline in fertility, with first service conception rates often falling below 40%. Over the same period, there have been considerable changes to ...
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ژورنال
عنوان ژورنال: Acta Veterinaria Scandinavica
سال: 1991
ISSN: 1751-0147
DOI: 10.1186/bf03546980