The standing and laying behavior of cows can predict their heat stress, according to a study conducted by the University of Arizona and Northwest Missouri State University.
Predicting heat stress is vital for keeping cows healthy and productive, said Dr. Jamison Allen during a presentation at the 2013 American Dairy Science Association Midwest Branch/American Society of Animal Science Midwestern Section Meeting. Cows will pant, eat less and produce less milk when their core body temperature increases. The researchers used two tools to study the relationship between behavior and temperature. They fitted each cow with an intra-vaginal sensor to measure core body temperature, and fitted each cow with a special leg sensor to measure the angle of the leg and track whether the cow was standing or lying. After comparing data from cows in Arizona, California and Minnesota, the researchers concluded that standing behavior and core body temperature are strongly correlated. Allen said cows stood for longer bouts of time as their core body temperatures rose from 101 degrees Fahrenheit to above 102 degrees.
According to Allen, dairy producers could use standing behavior to improve well being and efficiency in their herds. He said producers could use coolers and misters to target a specific core body temperature. By encouraging cows to lie down, producers will also help their cows conserve energy. Allen recommended future studies to see how cows respond to different cooling systems.
Near-record meat prices spur demand for animal feed
Can be used as substance for reduction of mycotoxin contamination of feed
extension outreach appointment, Dr. Tom Overton, professor of dairy management
within Cornell University’s College of Agriculture, spends much of his time
working with NY dairies, their nutritionists and vets on issues related to
transition cow management. In his opinion, one of the areas of opportunity for
dairy farms can be found in the management of the pre-calving diet. With
his team, Overton is currently involved in a commercial research study involving
55 farms focused on the influence of particle size on dry cow diets. “We’re
finding that diets are quite sortable with large differences in particle size
distribution,” Overton explains. “[The industry] needs to do a better job in
terms of particle size to make [the rations] less sortable.” In a
total mixed ration, sorting is problematic because cows tend to favor the grain
component and therefor may not consume the necessary fiber and nutrients. In
this video, Overton discusses his team’s research involving pre-calving dairy
diets at the World Dairy Expo. The 2014 edition of
the World Dairy Expo, which was held in early October in Madison,
WI, drew more than
300,000 visitors from roughly 90 countries. The event featured 2,500 head of
dairy cattle and more than 250 exhibitors.
--- Thank you for your patience ----
If you have any issues logging in or any other need feel free to contact us.