Factor affecting gestation length in dairy cow in Ratchaburi and Kanchanaburi
2002
Songpol Boontham(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine) | Surapong Cheunjit(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine) | Thongtong Kornkeawkan(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine) | Supakorn Meechoo(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine) | Kaitisak Tancharean(Kasetsart University. Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Veterinary Medicine. Departmenet of Veterinary Obstetric, Gynaecology and Animal Reporoduction)
Dairy cow disposal farm use the average of gestation length to fix the date of calve and to manage how to feed the dairy cow before that day. At present we still refer to the gestation length of foreign country. In study about the average of gestation length and the factors which involve to the pregnancy of 2599 dairy cows in Rachaburi and Kanchanaburi. We also found that the average is 276+-9 days. There are the factors that affect the gestation length such as sex (p LT 0.1) and number of calves (p LT 0.05) and the 3 months averages of the temperature that higher than 85 deg F (p LT 0.01). There is no difference between the average of the calving to first service interval and the average of the calving to conception interval in the cows that have gestation length less than 276 days.
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