Thirty-eight Angus-cross beef cows were used to evaluate differences in DMI, residual feed intake (RFI), and endocrine markers on the basis of cow size and RFI ranking during 2 stages of production. Cows housed in individual pens (2.2 × 9.1 m) were fed, over a 70-d feeding period, 30% Bermuda grass hay and 70% ryegrass baleage diet during lactation (LACT) and a 100% ryegrass hay diet during pos...

Die Dissertation wurde mit dankeswerter finanzieller Unterstützung der Stiftung Schleswig-Holsteinische Landschaft angefertigt. Water is one of the most important foodstuffs of a dairy cow – the average amount of 87% water in 1 kg of milk may confirm this thesis (Winchester and Morris, 1956). To ensure good animal health, performance and welfare status, a sufficient supply of water is essential...

Feed costs account for over 70% of the annual expenditures in cow/calf production. During the production year the cow uses nutrients to support conceptus growth, milk production, work (grazing and locomotion), and maintenance requirements. The majority of the nutrients are used to support maintenance. Substrate cycling has been identified as one of the major contributors toward energy expenditu...

Introduction Organochlorine pesticides and PCB congeners are persistent organic compounds found in the environment. Because of their stability and tendency to accumulate in fat they can enter the food chain and therefore be found in cow milk. As these chemicals are banned in most countries, it is expected that the compounds can still be found in cow milk due to environmental contamination of th...

The beef industry in the United States is developing programs to minimize excess fat produced, increase consistency of product and to identify and reward individual owners for superior performance in the feedlot. In the U.S., Strategic Alliances between cow-calf, feedlot and packer segments of the industry are being developed to accomplish this goal. Integrated production and marketing systems ...

A 3-year-old Holstein-Friesian cow was evaluated because of sudden onset of right hind limb lameness and pain with fetlock swelling for 2 days. Based on the history, clinical index scores and computed radiographic examinations, the case was accurately diagnosed to be a severely comminuted fracture of the proximal phalanx. This cow was assigned for conservative treatment with external coaptation...

To maintain a predominantly pasture-based system, the large herd milked by automatic milking rotary would be required to walk significant distances. Walking distances of greater than 1-km are associated with an increased incidence of undesirably long milking intervals and reduced milk yield. Complementary forages can be incorporated into pasture-based systems to lift total home grown feed in a ...

Florida ranks third among states east of the Mississippi river and 12th nationally in total number of beef cows (Florida Agricultural Statistics Service, 2002 Report). In contrast with other states, that may feed or background many of their weaned calves, more than 75% of Florida's calves are marketed each year. The beef industry in Florida is based primarily on calves that are conceived, born,...

TAKE HOME MESSAGES: 1. Average milk yield was similar for cows in ADS-ST or KK (91.2 vs. 93.0 lbs/d) pens. 2. 1st lactation heifers in the KK pen tended to produce more milk (83.4 vs. 81.0 lbs/d). 3. The initial investment for the ADS-ST was less ($58,500 vs. $118,067). a. ADS-ST = $234/cow vs. $472/cow for the KK coolers. 4. ADS-ST used less electricity, water and had lower daily costs ($27.30...