Dairy reproductive efficiency improvement in high grade Holstein Friesian heifer and young cow through herd fertility management in Thailand
1999
Kanchana Markvichitr | Nam Buathong | Supot Satjapitak | Sithichai Kaewsuwan (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Animal Science)
Reproductive efficiency improvement in high grade heifers and young cows were carried out at Kamphaengesaen Dairy Research and Development Center. An economically important traits such as milk performance test, reproductive efficiency and herd health management were determined in 11 replacement heifers and 13 young cows. The research results were revealed that an average of milk performance data such as adjusted lactation yield (305 days), milk yield per day, actual days in milk, milk butter fat and milk protein were 4,087 kgs, 13.4 kgs, 279.6 days, 4.35 percent and 3.34 percent respectively. An average of artificial insemination index and also conception rate in replacement heifers and young cows were 1.46, 100 percent and 84.6 percent respectively. Dairy herd health problems are mainly dued to metabolic acidosis, Laminitis, Mastitis caused by beta-haemolytic Streptococci and Escherichia coli. An evaluation for culling in young cow are mostly caused by organic anestrus and repeat breeders around 15.4 percent that most of them could be therapied successfully by Progestins hormone plus Prostaglandins (PGF2a)
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