subject: milk yield

Cows May Go Green

Cows May Go Green

It’s a tough gig being a cow. Productivity expectations for meat and milk are high, and at the same time, the cow gets a bad rap for belching a potent greenhouse gas, methane, which is a by-product of its digestion. Some people say it’s like driving a car very hard on a winding mountain road and then complaining about the car’s increased exhaust gas emissions. Reducing emissions and fuel consumption while maintaining performance is the golden ambition of car manufacturers. A similar goal is also true for the cow. People in many government agricultural agencies and the Food and Agriculture Organization (FAO) want the beef and dairy industries to use more productive cattle emitting less methane and using less feed i.e., increasing industry production efficiency while decreasing its environmental footprint. It’s a tall order seemingly resisted by the realities of cow biology, however recent ground-breaking research may have opened new opportunities to meet these ambitious aims. Read More...

A Cow’s Milk Reveals Her Health

A Cow’s Milk Reveals Her Health

Defense wins games. Ask any coach impatiently striding the sidelines. “The defensive line-up must be ever vigilant and able to rapidly neutralize the attacking incursion, which may come from any direction. You cannot wait for help from the cover defense! Any defensive lapse will be ruthlessly exploited by this opposition and all will be lost,” shouts the coach at spent and cowed players as the bell signals the end of their halftime break. Coaches could learn a lot more about defense from biology. An exemplar defensive strategy par excellence is used by mammals, especially dairy cows, where the defensive system is the animal’s immune system, the best in the league, and the opposition threat is microbial infection. Read More...

The Energy Cost of Immune Cell Victory

The Energy Cost of Immune Cell Victory

Immune cells are strange beasts. Their favorite occupation, like a child nearing the end of a long summer vacation, is just hanging around looking for something to do. Usually, they just cruise the body in the blood, sometimes detouring into tissues seemingly just because they can. All is good. Read More...

Happy Cows to Reduce Milk Fever

Happy Cows to Reduce Milk Fever

Serotonin is best known to us as a brain factor that affects mood, with high levels associated with euphoria. However, it has much wider effects in the body, influencing gut motility, blood vessels, and osteoporosis. To scientists, this points to an interaction with calcium, and as we all know, calcium is an important component of milk and dairy products. So does serotonin influence milk calcium, and could the mood of cows affect milk production? Recent research by scientists in Wisconsin suggests that serotonin has an effect on regulating calcium in the important transition period from late pregnancy through lactation. Read More...

Genomic Selection Accelerates Improvements in Health and Productivity of Dairy Cows

Genomic Selection Accelerates Improvements in Health and Productivity of Dairy Cows

The introduction of genomic selection into dairy cattle selective breeding programs has been greatly anticipated and is a remarkable example of the benefits of genomic technology. Made possible because the systems for selective breeding were already well developed in dairy, and the widespread use of artificial insemination meant that new developments could be delivered quickly. First introduced in the USA in 2008, there has now been sufficient time to generate enough data to assess its impact. Read More...

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