Factors Affecting Days Open, Gestation Length, and Calving Interval in Florida Dairy Cattle
نویسندگان
چکیده
منابع مشابه
Factors affecting days open, gestation length, and calving interval in Florida dairy cattle.
Effects of several factors on reproductive performance were evaluated. Mean performance and number of observations were for days from parturition to first service, 93 and 7730; days from first to successful service, 35 and 11,751; days open, 123 and 8571; gestation length, 280 and 13,612; and calving interval, 400 and 8524. Data covered 52 yr during which no detectable trends in calving interva...
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Genetic and environmental factors that might affect gestation length (GL) were investigated. Data included information from >11 million parturitions from 1999 through 2006 for 7 US dairy breeds. Effects examined were year, herd-year, month, and age within parity of conception; parturition code (sex and multiple-birth status); lactation length and standardized milk yield of cow; service sire; co...
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Postnatal growth and performance in cattle are influenced to some extent by the course of prenatal development. It is important, therefore, to know what factors affect prenatal development and the degree of variation brought about by these factors. The present study was undertaken as part of a broad project to evaluate the factors that affect the efficiency of feed utilization in cattle. This p...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1992
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(92)77764-9