The experiment was carried out to investigate the changes in physiological parameters and blood flow during different seasons (winter, thermo-neutral and summer) in Sahiwal (SW), Tharparkar (TP), Gir (GR) and Karan Fries (KF) dairy cows. Four healthy lactating cows from each breed were ...
dairy cattle - cattle that are reared for their milk dairy cow, milch cow, milcher, milk cow, milker Bos taurus, cattle, cows, kine, oxen - domesticated bovine animals as a group regardless of sex or age; "so many head of cattle"; "wait till the cows come home"; "seven thin and...
Dairy cattle are those breeds that produce larger volumes of milk for a longer period of time than other cows.In the United States today, there are 6 main breeds of Dairy cattle.The most common dairy breeds are Holstein, Jersey, Brown Swiss, Guernsey, Ayrshire, and Milking Shorthorn. ...
Finally, analysis of variance failed to show distinct patterns of methane per unit of DMI and milk for individual animals. The apparent lack of persistence of individual animal differences in methane yields suggests that genetic determination of this trait is of minor importance in dairy cows. 展开...
The ins & outs of California dairy cows. The nutrients from the feed are turned into milk by four mammary glands found in the udder. The droplets of milk are drained through an opening called a duct into the udder. Cows belong to a group of animals called ruminants. This means they have...
Each of these breeds have achieved large increases in production through the past several decades due to extensive recording systems and well-designed genetic evaluation programs. The structure of the dairy industry in North America and Europe is such that recognition of the existing breeds is likely...
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Colostral immunoglobulin concentrations were compared among five breeds of dairy cows. Colostrum samples (3 to 4 kg) were obtained immediately after parturition from 19 Ayrshire, 17 Brown Swiss, 12 Guernsey, 19 Holstein, and 5 Jersey cows. Average total colostral immunoglobulin was 8.1, 6.6, 6....
The effect of treatment of dairy cows of different breeds with recombinantly derived bovine somatotropin in a sustained delivery vehicle. Livest. Prod. Sci. 21:13.Oldenbroek, J. K.. G. J. Garssen, A. B. Forbes, and L. J. Jonker. 1989. The effect of treatment of dairy cows of ...