Feed Consumption Differences Among Lactating Cows

Genetic Regulation of Feed Efficiency in Lactating Holstein Cows

Differences between lactating and non-lactating dairy cows in concentration and secretion rate of insulin.

1. Four parameters of insulin metabolism were compared in catheterized lactating and non-lactating Friesian x Ayrshire dairy cows. 2. The four parameters, i.e. arterial and portal-venous concentrations of insulin, and pancreatic output and hepatic uptake of insulin, were approx. 2-, 3-, 3- and 5-fold higher respectively in the non-lactating cows than in the lactating cows in the normal fed sta...

The prevalence of mycobacterial infection among lactating Fulani cows

17 18 The prevalence of mycobacterial infection among lactating Fulani cows was investigated in 19 the Federal Capital Territory (FCT), Abuja and Kaduna State of Nigeria. Tuberculin testing 20 using single comparative intradermal tuberculin test (SCITT) showed a 14.6% positive, 4% 21 doubtful and 81.4% negative reactors. Mycobacterial infection was found to be present in the 22 nomadic (constan...

Adding liquid feed to a total mixed ration reduces feed sorting behavior and improves productivity of lactating dairy cows.

This study was designed to determine the effect of adding a molasses-based liquid feed (LF) supplement to a total mixed ration (TMR) on the feed sorting behavior and production of dairy cows. Twelve lactating Holstein cows (88.2±19.5 DIM) were exposed, in a crossover design with 21-d periods, to each of 2 treatment diets: 1) control TMR and 2) control TMR with 4.1% dietary dry matter LF added. ...

Dietary forage concentration affects the feed sorting behavior of lactating dairy cows.

The objective of this study was to determine whether the amount of forage in a total mixed ration influences feed sorting by cows and whether the extent of this sorting changes as they adapt to a new diet. Six lactating Holstein cows, individually fed once per day, were provided each of 2 diets in a crossover design (dry matter basis): 1) a higher forage diet (HF; 62.3% forage), and 2) a lower ...