Friday, 14 April 2017 08:55

Genetics to help reduce excreted nitrogen

Written by  Mark Daniel
From left: Matt Mcfie, Phil Beatson and  Angus Haslett at CRV Ambreed stand at SI Field Days. From left: Matt Mcfie, Phil Beatson and Angus Haslett at CRV Ambreed stand at SI Field Days.

Five years of research has led to CRV Ambreed discovering that selective breeding will help reduce urinary nitrogen leaching on NZ farms by 20% within 20 years.

The research looked at the connection between milk urea nitrogen (MUN) and nitrogen in urine. The link between MUN and lower nitrogen output is acknowledged in international research, but this is thought to be the first time the specific trait has been bred for and promoted.

Phil Beatson, R&D manager for CRV Ambreed, says the research looked at tackling urinary nitrogen (UN), considering that nitrogen taken in by cows in their feed is converted into milk protein, growth, dung, gases and urine.

Since 2012 the research has looked at the MUN concentration in 650,000 milk samples and analysed them to understand what is inherited, and to create a MUN value for all animals.

Today the company has identified about 25 high quality and top-performing CRV Ambreed bulls with the desirable genetic makeup for low levels of MUN, while also offering traditional production traits. It will sell semen from bulls whose daughters will have reduced concentration of MUN under the LowN Sires brand.

Hundreds of thousands of straws of semen are now available from the LowN Sires team, Beatson says, “exciting news for farmers -- the potential to help meet their environmental compliance through breeding.”

Cows bred for lower levels of MUN are expected to excrete less nitrogen in their urine and so reduce the amount of nitrogen leached from grazed pasture.

Says Beatson, “Daughters of CRV Ambreed’s 2017 LowN Sires could save NZ 10 million kilograms nitrogen leaching a year, based on the national herd number of 6.5 million dairy cattle.” CRV Ambreed’s projections indicate it is possible to breed cattle that will reduce nitrogen leaching by 20% within 20 years.

CRV Ambreed managing director Angus Haslett points ahead to ‘greener’ cows -- improved offspring to be born in 2018 and lactating in 2020. Mitigating nitrogen leaching will save a lot of money and help the environment, he says.

“The beauty of the genetic approach is it adds to other strategies a farmer might be using to reduce nitrogen leaching. CRV Ambreed offers a long-term solution that fits within the standard AI mating programme.

“Genetics can produce great gains for farmers, and many farmers already choose our bulls to breed certain traits in their cows; this is another step to finding solutions in genetics rather than products.”

DairyNZ applauds the genetics news. Its strategy and investment leader for productivity, Dr Bruce Thorrold, says “if the planned science proves the link between breeding for MUN and urinary nitrogen output, this would give farmers in nitrogen-limited regions such as Canterbury more options to reduce nitrogen leaching without going away from a pasture-based system”.

“Animal breeding would potentially add to gains from DairyNZ investment in research on managing nitrogen inputs, using stand-off and finding plants with lower nitrogen content.”

CRV Ambreed has begun briefing regional councils about the work.

www.crv4all.co.nz/lownsires

More like this

Putting farmers first

The NZ agriculture sector is more than just a job for CRV Ambreed’s new managing director James Smallwood.

Featured

 

National

Global movers and shakers

Dairy companies around the world are facing a dilemma – whether to expand or divest assets, says Rabobank’s Mary Ledman.

Live cattle exports in limbo

The fate of 28,000 cows in quarantine in New Zealand and supposedly destined for China in the coming weeks hangs…

Machinery & Products

Mowers get a makeover

Well known throughout New Zealand over the past 18 years, Pottinger has redesigned its rear-mounted Novadisc mowers to incorporate a…

Hardy spotlight

High quality, reliable lighting is essential for anyone involved in agriculture or the great outdoors.

Simmm twin water blasters

Italian made Simmm Power Cleaner 100/11 and Power Gun 100/11 single-phase (230 volt) electric water blasters are proving popular in…

OPD argument raging on

A stoush is brewing with the Federal Chamber of Automotive Industries (FCAI) heavily criticising Farmsafe Australia’s recent Safer Farm Report.

» Latest Print Issues Online

Milking It

Cows and earthquakes

OPINION: It has long been suggested that animals have senses that humans don’t, and often behave differently than usual shortly…

Battle is on

OPINION: One of Australia’s biggest dairy businesses is back on the market after the Federal Government knocked back a bid…

» Connect with Dairy News

» eNewsletter

Subscribe to our weekly newsletter