Strategies for increasing fertility in high productivity dairy herds
نویسندگان
چکیده
منابع مشابه
Fertility Programs to Achieve High 21-d Pregnancy Rates in High-Producing Dairy Herds
Hormonal synchroniza on protocols have been incorporated widely into reproduc ve management programs by dairy farmers (Caraviello et al., 2006; Norman et al., 2009). The ini al impact of TAI protocols on 21-day pregnancy rates in U.S. dairy herds has been to increase the AI service rate (Norman et al., 2009); however, a deeper understanding of the physiology underlying the Ovsynch protocol has ...
متن کاملFertility in Dairy Herds - Advanced Part 1: What does poor fertility cost?
Recent data from many countries suggests that this decline in fertility may have slowed for example, the Scandinavian countries have now shown that selection for fertility can result in improvements without major effects on milk yield. However, irrespective of general trends in fertility, there are still large differences between farms, which means that on most farms fertility could be improved...
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These effects occur in cows with mild and moderate mastitis as well as those with severe mastitis; in cows with Gram negative pathogens (e.g. E. coli) and Gram positive ones (e.g. Staph. aureus); in cows which get mastitis before breeding and in cows which get mastitis afterwards. In fact for the last comparison, some studies have shown that cows which get mastitis after they have been bred for...
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A study based on bulk tank milk samples from 120 randomly selected dairy cattle herds was conducted to estimate the prevalence of Coxiella burnetii seropositive dairy herds, to describe the geographical distribution, and to identify risk factors. Using the CHEKIT Q-fever Antibody ELISA Test Kit (IDEXX), the study revealed a prevalence of 79.2% seropositive herds, 18.3% seronegative herds, and 2...
متن کاملStrategies for improving fertility in the modern dairy cow.
The high producing dairy cow of the 21st century is subfertile during lactation. Our objectives are to characterize physiological periods limiting reproductive performance and to describe integrated management strategies to improve pregnancy rates. Ovarian recrudescence with normal re-occurring estrous cycles and restoration of fertility to first service are associated with a reduced occurrence...
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ژورنال
عنوان ژورنال: Animal Reproduction
سال: 2018
ISSN: 1984-3143
DOI: 10.21451/1984-3143-ar2018-0079