Tag Archives: phosphorus

Phosphorus in Agriculture workshop

The Australasian Soil and Plant Analysis Council and the Australian Society of Soil Science Inc are presenting a ‘Phosphorus in Agriculture’ workshop at the Waite Campus on Thursday, 20th of September.

The need for efficient use of phosphorus (P) in agricultural systems has been highlighted recently due to concerns about the finite nature of P fertiliser resources and the likelihood of increasing agricultural production costs due to rising fertiliser prices. At the other end of the spectrum there are environmental concerns associated with P-induced eutrophication of waterways, where run-off from P fertilisers, both organic and inorganic, is an issue.

The phosphorus cycle is complex with multiple chemical and biological functions working together to enable the soil to sustain crop and pasture P nutrition. In addition, the variability of soil types within Australian agricultural systems provides significant challenges for sound agronomic P management advice. This workshop brings together leading researchers and advisers to consider and discuss best-practice strategies that will address the requirement for improving P utilisation in agricultural systems to maximise economic outcomes and minimise detrimental effects on the environment.

Speakers include
•    Alan Richardson (CSIRO), Rob Norton (IPNRI), Ron Smernik, Sean Mason, Fien Degreyse, Maria Manjarrez (University of Adelaide), Phil Barnett (APAL), Roger Armstrong (DPI, Vic), Bill Long (Ag Consulting) and Therese McBeath (CSIRO)
Covering a range of topics, including
•    P uptake by plants and mycorrhiza; fertilizer design, supply and use efficiency; quality control and analysis of soil P; organic P in soil.

For more information go to the Australian Society of Soil Science SA Branch website.

To register click here.

Closing date for registrations: 14th of September

When: Thursday September 20th, 2012, 8:30 am – 5:00 pm
Where: Charles Hawker Conference Centre, Charles Hawker Building room 107, University of Adelaide, Waite Campus, Waite Road Urrbrae

Current financial member of ASSSI – $55
Current financial member of ASPAC – $55
Not a financial member of ASPAC or ASSSI – $110
Student – $44

Price includes tea/coffee, lunch and finger food at Lirra Lirra after the meeting

The Harold Woolhouse Lecture 2010 – Podcast Avaliable

“Looking back and looking forward: time for fresh thinking on roles of arbuscular mycorrhizal (AM) fungi in plant phosphorus (P) uptake” Listen to Professor Sally Smith’s talk which was given at the Inaugural Harold Woolhouse Lecture on the 8th November, 2010.

This talk will start with some brief reflections on Harold Woolhouse at the Waite. Professor Smith will then 1) review the immediate relevance of studies of phosphorus (P) nutrition of plants, in the light of the low availability of P in soil, the need for P fertiliser application to achieve satisfactory crop yields and the limited global P resources; 2) introduce arbuscular mycorrhizas as the most common and widespread adaptation involved in plant P uptake; 3) provide an update on how recent research has fundamentally changed knowledge of how AM symbioses influence plant P uptake; and 4) present a new hypothesis to explain why some plants (including the important crops wheat, barley and tomato) sometimes grow better when non-mycorrhizal.

Professor Sally Smith

Professor Sally Smith

 

Improving Nitrogen and Phosphorus use of cereals to help food security

Friday 24th September marks the final day of the 15th International Workshop on Plant Membrane Biology, and is a feature day for the Australian Centre for Plant Functional Genomics (ACPFG). In particular the day will highlight work at the Centre into the nitrogen use efficiency (NUE) of cereal
plants.

‘Given the environmental effects associated with production and usage of nitrogen fertilisers, and the suggestion that we may be approaching peak phosphorus, increased food production will require crops that use fertilisers more efficiently, that is, we need to increase the nutrient use efficiency of crops,’ said Dr Trevor Garnett, NUE researcher at ACPFG

Nutrient use efficiency researchers from around the world will meet on the Friday at the National Wine Centre to discuss their research and strategies for international collaboration to address this problem.

‘Currently the demand for food is close to the limits of what we can produce, but by 2050 it is suggested that we will need to increase food production by 60% according to a 2008 Food and Agriculture Organisation of the United Nations report,’ he said.

Nitrogen (N) is one of the biggest input costs for farmers and the price is increasing because of the power used to industrially fix N from the atmosphere. Approximately 2 % of the world’s energy is used to produced N fertiliser; this causes a considerable greenhouse gas contribution.

‘Over 100 million tonnes of Nitrogen fertiliser is applied to crops each year and 60% of this on cereals,’ said Dr Garnett. ‘Given the costs and environmental effects associated with production and usage of nitrogen fertilisers, plants with increased nitrogen use efficiency are of great importance to future food security.’

Nitrogen is the fertiliser that plants require the most, but only 40-50% of the applied fertiliser is taken up by the cereal crops. The nitrogen not taken up leads to pollution of waterways and oceans, one consequence being algal blooms at river deltas causing dead zones.

Unused nitrogen fertiliser has a further environmental impact in that it is broken down in the soil by microbes and released into the atmosphere as nitrous oxide, a greenhouse gas 300 times more potent than carbon dioxide.

Plants require less phosphorus than nitrogen but there is a lot less available. Current estimates are that the world will reach peak phosphorus by the middle of this century. Peak phosphorus, in the same way as peak oil, means the readily available supplies have been utilised and the cost of phosphorous fertiliser will dramatically increase.

The Friday session includes plenary speakers representing the key international groups specialising in NUE and research presentations describing key rate limiting steps in NUE that are currently being targeted to improve the NUE in crop plants.

IWPMB 2010 Website

The Harold Woolhouse Lecture 2010

Looking back and looking forward: time for fresh thinking on roles of arbuscular mycorrhizal (AM) fungi in plant phosphorus (P) uptake

This talk will start with some brief reflections on Harold Woolhouse at the Waite. Professor Smith will then 1) review the immediate relevance of studies of phosphorus (P) nutrition of plants, in the light of the low availability of P in soil, the need for P fertiliser application to achieve satisfactory crop yields and the limited global P resources; 2) introduce arbuscular mycorrhizas as the most common and widespread adaptation involved in plant P uptake; 3) provide an update on how recent research has fundamentally changed knowledge of how AM symbioses influence plant P uptake; and 4) present a new hypothesis to explain why some plants (including the important crops wheat, barley and tomato) sometimes grow better when non-mycorrhizal.

The 3rd Harold Woolhouse Lecture is named in honour of the former Director of the Waite Agricultural Research Institute. Professor Woolhouse finished his PhD at the University of Adelaide before spending much of his early career (during the 1960s and 1970s) researching heavy metals and senescence. Between 1980 and 1989, Professor Woolhouse developed and directed the world class plant biology research facility, the John Innes Centre (JIC) in Norwich, United Kingdom. In 1990, he became Director of the Waite Agricultural Research Institute and was responsible for the co-location of the South Australian Research and Development Institute and Primary Industries and Resources South Australia on the Waite Campus. He also masterminded the merging of Roseworthy Agricultural College with the University of Adelaide. He left Adelaide in August 1995 due to ill health and passed away in June 1996.

Date/Time: Monday 8th November, 4pm
Location:
Plant Genomics Centre Seminar Room (Level 1), Waite Campus
Speaker: Professor Sally Smith, University Of Adelaide
Cost
: Free

The presentation will be followed by drinks and nibbles

For further Information contact: Dr Amanda Able