Life Span and Livability of Crossbred Dairy Cattle
نویسندگان
چکیده
منابع مشابه
Reproductive Efficiency of Purebred and Crossbred Dairy Cattle
Nine measures related to breeding efficiency were used for comparisons among purebred Ayrshires, Brown Swiss, Holsteins, and Jerseys and between purebreds and 32 crossbred groups representing 2-breed, 3-breed, 5/8, and backcrosses by purebred sires and progeny of crossbred sires. There were four herds wi th Holsteins common to all, Brown Swiss and Jerseys in three herds and Ayrshires in one her...
متن کاملEconomic merit of crossbred and purebred US dairy cattle.
Heterosis and breed differences were estimated for milk yield traits, somatic cell score (SCS), and productive life (PL), a measure of longevity. Yield trait data were from 10,442 crossbreds and 140,421 purebreds born since 1990 in 572 herds. Productive life data were from 41,131 crossbred cows and 726,344 purebreds born from 1960 through 1991. The model for test-day yields and SCS included eff...
متن کاملClinical Management of Babesiosis in Crossbred Dairy Cattle
Four months back calved crossbred dairy cow had history of coffee coloured urine. Blood smear and Blood samples of this cow were collected on the day of acute stage of infection and then 15th day of post treatment for haematological parameters. Based on the clinical pathonomonic symptom (coffee coloured urine) and blood smear examination presence of Babesia bigemina organisms the disease was di...
متن کاملBlack Quarter in crossbred dairy cattle- A Case Report
Aim: A sporadic incident of Clostridial disease that affected Holstein Friesian (HF) cross bred cows (n=8) at an organized dairy farm was investigated. Materials and Methods: Detailed clinical investigations and treatment were carried out on all the affected animals. Complete blood count (CBC) and plasma biochemistry were performed on survived animals (n=6). The needle biopsy samples were subje...
متن کاملAcute phase response in lame crossbred dairy cattle
AIM The study was undertaken to study acute phase response based on acute phase proteins (APPs) such as C-reactive protein (CRP), haptoglobin (Hp), serum amyloid A (SAA), and fibrinogen in lame crossbred dairy cattle. MATERIALS AND METHODS Lame animals (n=30) were selected within 3-7 days of being noticed as lame by the farm veterinarian, from a local dairy farm in southeast Ludhiana over a p...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1966
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(66)87996-1