Wednesday, 26 October 2016 08:55

Many ways to reduce ag emissions

Written by  Peter Burke
Parliamentary commissioner for the environment, Jan Wright with her latest report. Parliamentary commissioner for the environment, Jan Wright with her latest report.

No one immediate solution is available to New Zealand to deal with the problem of greenhouse gas emissions caused by agriculture.

So says the parliamentary commissioner for the environment, Dr Jan Wright, in a new detailed report on the complex science issues and the solutions now being researched. The 100-page report does not point the finger or blame anyone in particular, but factually presents the science challenges and how these can be solved by scientists and implemented practically by farmers.

The problems, says Wright, are well known and relate to methane and nitrous oxide -- methane occurring in the rumen of cattle, sheep, goats and deer, and nitrous oxide mainly in urine deposited in the soil by animals

Potential solutions flagged are planting more trees, a vaccine to deal with the methanogens which cause methane in the rumen of animals, breeding animals that produce less methane and forages/grasses that reduce methane and nitrous oxide. But Wright insists none of these individually -- apart from tree planting -- will promptly solve the problem.

Wright points to examples of NZ farmers who have already moved to reduce emissions by reducing stock numbers but still retaining profitability. Examples mentioned are Lake View Farms near Hamilton and the Bartons near Taupo.

The report, intended to promote discussion, seeks to get a clear picture of the science out into the public domain; it not designed to blame, Wright says, because this doesn’t help.

“Certainly dairy is implicated in water quality issues because of the way in which cows urinate, although I would always say that the sediment-phosphate part of the equation really goes back to sheep. Nitrous oxide is of concern in all ruminants; yes, a cow will produce more than a sheep because it is a bigger animal but it is also producing more protein. This is about all the ruminants which belch methane.”

The report is aimed at keeping in mind the target of NZ having a low carbon economy.

Wright notes that NZ is among the highest greenhouse gas emitters per capita because we are a food producer.

More like this

The politics of climate change

OPINION: The Financial Times, a major international newspaper, featured New Zealand on its front page at the beginning of June. It wasn't for the right reasons.

Featured

NZ household food waste falls again

Kiwis are wasting less of their food than they were two years ago, and this has been enough to push New Zealand’s total household food waste bill lower, the 2025 Rabobank KiwiHarvest Food Waste survey has found.

Editorial: No joking matter

OPINION: Sir Lockwood Smith has clearly and succinctly defined what academic freedom is all about, the boundaries around it and the responsibility that goes with this privilege.

DairyNZ plantain trials cut nitrate leaching by 26%

DairyNZ says its plantain programme continues to deliver promising results, with new data confirming that modest levels of plantain in pastures reduce nitrogen leaching, offering farmers a practical, science-backed tool to meet environmental goals.

National

Machinery & Products

JDLink Boost for NZ farms

Connectivity is widely recognised as one of the biggest challenges facing farmers, but it is now being overcome through the…

New generation Defender HD11

The all-new 2026 Can-Am Defender HD11 looks likely to raise the bar in the highly competitive side-by-side category.

» Latest Print Issues Online

Milking It

Full cabinet

OPINION: Legislation being drafted to bring back the controversial trade of live animal exports by sea is getting stuck in the…

» Connect with Dairy News

» eNewsletter

Subscribe to our weekly newsletter