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Home / The Country

Rick's Beef: World-first tool to slow methane

Te Puke Times
13 Dec, 2019 02:27 AM3 mins to read

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Breeding value is used to help select important traits ram breeders want to bolster in their flock, such as low methane-producing animals. Photo / File

Breeding value is used to help select important traits ram breeders want to bolster in their flock, such as low methane-producing animals. Photo / File

In a world first, New Zealand sheep farmers now have the ability to breed animals that emit less methane.

Beef + Lamb New Zealand (B+LNZ) Genetics has launched a "methane research breeding value". Breeding value (BV) is used to help select important traits ram breeders want to bolster in their flock, such as low methane-producing animals.

The launching of this significant breeding tool is thanks to a 10-year, multimillion-dollar collaboration between the Pastoral Greenhouse Gas Research Consortium, New Zealand Agricultural Greenhouse Gas Research Centre and AgResearch, supported by the Ministry of Business, Innovation and Employment and Ministry for Primary Industries.

Ram breeders wanting to pursue the methane breeding value will need to measure a portion of their flock using Portable Accumulation Chambers. These chambers are on an AgResearch-operated trailer, which travels to farms. Sheep spend 50 minutes in the chambers, where their gas emissions are measured. This happens twice, at a 14-day interval. The resulting information is then used alongside other genetic information to calculate the methane breeding value.

King Country stud breeder Russell Proffit's family has been producing rams for 40 years. Twenty years ago, Raupuha Stud began breeding lower-input sheep — naturally able to stave off common health ailments and requiring fewer interventions.

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"I've undertaken the Methane BV measurements because I believe an animal that is healthy and doing well should produce less methane and I wanted to test that. I don't know if that's the case yet, but either way breeding for less methane complements what we are working to achieve on our stud. That is, more robust rams that require less inputs and make less demand on the environment."

Mr Proffit says his commercial farmer clients have already expressed interest in the methane breeding value.

"Farmers are more interested that I anticipated. They are thinking about this issue and looking for ways to make progress."

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B+LNZ chief executive Sam McIvor says this interest was reinforced in recent B+LNZ research of 1000 farmers, where tools and information to reduce greenhouse gas emissions were among farmers' top five on-farm priorities.

Interested farmers will have access to rams within two years — the time it will take to breed and grow rams on a commercial scale.

PGGRC general manager Mark Aspin says the new breeding value takes advantage of the fact individual sheep vary in their levels of methane emission and these differences are passed on to the next generation.

"This is a global first for any species of livestock. Launching the methane breeding value gives New Zealand's sheep sector a practical tool to help lower our agricultural greenhouse gases. Up until now, the only option available to farmers wanting to lower their greenhouse gas emissions has been to constantly improve their overall farming efficiency.

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"This takes us a step further — towards actually lowering sheep methane emissions, in keeping with the sector's commitment to work towards reducing its greenhouse emissions."

Although progress via breeding can be slow — around 1 per cent per year, assuming a breeder was selecting only for methane — it is cumulative and has no negative impact on productivity.

Mr Aspin says it is important to note the biggest influence on methane emissions is the amount of feed an animal eats.

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