fbpx
Print this page
Monday, 19 October 2015 07:00

Nutrient loss under spotlight

Written by 
Ian Tarbotton, Ballance Agri-Nutrients. Ian Tarbotton, Ballance Agri-Nutrients.

New Zealand's shift from a pasture-based model to high feed-input dairy farms will come under the microscope in a joint research project.

The two year project, led by AgResearch's Dr Stewart Ledgard, will use case study farms varying in intensity of feed use to examine effects of their system changes over the last decade on emissions, production and profit, and will test options for improving their sustainability.

"Locally there is strong interest in understanding implications for water quality of dairy intensification through increased use of supplementary feeds and how effects can be minimised; and internationally there is a desire for food products to be produced with efficient use of resources and reduced wider environmental impacts," says Ledgard.

"This project will apply a mix of regional and international market related methods."

The project also involves Ballance Agri-Nutrients, AgResearch, DairyNZ and Tatua, in partnership with the Government's Sustainable Farming Fund initiative.

Ballance science extension manager Ian Tarbotton says the industry recognises the rise in high feed-input farms in the past 10 years, but there is no holistic approach to determine when the higher-input system has an adverse impact on the farm business and beyond.

"This project... will evaluate the whole farming system, accounting for all land and brought-in feed through to water quality and energy use.

"We will be able to help farmers with nutrient use efficiency and farm system monitoring through increased farmer awareness of the hot-spots for nutrient losses."

Tarbotton says that over the last decade dairying has changed, seeing larger average herd sizes, higher milk production and stocking rates and a rise in land prices and farm debt.

While different studies had been done, few have looked at the economic and wider environmental impacts or taken a whole-of-farm view.

"Future farm systems will have different monitoring, metrics and thresholds for onfarm decision making. New indices will come from this research such as water use/kgMS or nitrogen leached by profit level.

"Farmers will be able to rely on better evidence-based scientific information to drive their farm decisions rather than defaulting to routine decision making.

"Farmers need insight into the implications of environmental policies on water and nutrient loss to ensure their increase in feed doesn't push them outside these limits."

More like this

DairyNZ board sets new levy rate

DairyNZ has set a new levy rate of 4.5c/kgMS from 1 June 2025 and aims to keep the levy at no more than this rate for a minimum of three years.

Dairy power

OPINION: The good times felt across the dairy sector weren't lost at last week's Beef + Lamb NZ annual meeting.

Featured

Awards celebrate rural sports talent

At a gala evening held at Palmerston North in March, the sporting and rural communities came together to celebrate the Ford New Zealand Rural Sports Awards.

New CEO for FAR

The Foundation for Arable Research (FAR) has appointed Dr Scott Champion as its new chief executive.

New genetic tool for beef farmers

Beef + Lamb New Zealand (B+LNZ) has launched a powerful new tool to help commercial beef farmers select the best bulls for their farm businesses.

Bremworth CEO departs

Three weeks on from Bremworth’s board overhaul, the carpet maker’s chief executive Greg Smith is stepping down.

National

Machinery & Products

Amazone extends hoe range

With many European manufacturers releasing mechanical weeding systems to counter the backlash around the use and possible banning of agrochemicals,…

Gong for NH dealers

New Holland dealers from around Australia and New Zealand came together last month for the Dealer of the Year Awards,…

A true Kiwi ingenuity

The King Cobra raingun continues to have a huge following in the New Zealand market and is also exported to…