Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search


Stray voltage a negative for dairy cows

Stray voltage a negative for dairy cows

Meridian Energy has increased milk quality and reduced the milking time at a dairy-shed in Kurow, North Otago, by eliminating stray voltage in the shed.

“The large electric motors used in modern dairy sheds often mean there is a small voltage running across the concrete floor of the shed, which cows can feel,” says , Meridian’s Rural and Business Segment Manager.

At a Kurow dairy farm owned by Meridian Energy, this stray voltage was found to be around 1.5 volts. Cows can feel a voltage as low as 0.4 volts.

“As a result, the cows would not come easily into the shed, they would sniff the ground, would not cup up easily as a result of teat retraction, or would kick the cups. They would also tend to defecate in the shed, and be under stress as a result of this stray voltage.”

People working in the shed could not feel the voltage because they usually wore rubber gumboots.

“The solution was to run a 4mm thick copper ring around the concrete rotary bale in the shed. This was set in the ground at a depth of 400mm with a 2m long stainless steel peg every 5m or so,” says .

This innovation has eliminated the stray voltage in the shed. Nearby farm houses or other buildings with electrical appliances can also contribute to stray voltage in dairy sheds.

“The sharemilker and three staff used to take four hours to milk the cows. Milking time has now dropped to around two hours,” says .

The reduction in stress levels of the cows has improved the quality of the milk, reflected in a lower sematic cell count.

“The shorter milking means less energy use and therefore improved energy efficiency, with the added benefit of lower energy costs to the sharemilker,” concludes .


© Scoop Media

Business Headlines | Sci-Tech Headlines


Half A Billion Accounts: Yahoo Confirms Huge Data Breach

The account information may have included names, email addresses, telephone numbers, dates of birth, hashed passwords (the vast majority with bcrypt) and, in some cases, encrypted or unencrypted security questions and answers. More>>

Rural Branches: Westpac To Close 19 Branches, ANZ Looks At 7

Westpac confirms it will close nineteen branches across the country; ANZ closes its Ngaruawahia branch and is consulting on plans to close six more branches; The bank workers union says many of its members are nervous about their futures and asking ... More>>

Interest Rates: RBNZ's Wheeler Keeps OCR At 2%

Reserve Bank governor Graeme Wheeler kept the official cash rate at 2 percent and said more easing will be needed to get inflation back within the target band. More>>


Half Full: Fonterra Raises Forecast Payout As Global Supply Shrinks

Fonterra Cooperative Group, the dairy processor which will announce annual earnings tomorrow, hiked its forecast payout to farmers by 50 cents per kilogram of milk solids as global supply continues to decline, helping prop up dairy prices. More>>



Meat Trade: Silver Fern Farms Gets Green Light For Shanghai Maling Deal

The government has given the green light for China's Shanghai Maling Aquarius to acquire half of Silver Fern Farms, New Zealand's biggest meat company, with ministers satisfied it will deliver "substantial and identifiable benefit". More>>


Get More From Scoop

Search Scoop  
Powered by Vodafone
NZ independent news