Investment

Investment

GRDC Code: UOA1805-017RTX
Increasing the effectiveness of nitrogen fixation in pulse crops through development of improved rhizobial strains, inoculation and crop management practices
Expansion of the pulse industry is seeing crops increasingly sown on soils that are challenging to plant establishment and growth. In these areas, pulses are often grown in the paddock for the first time or, have been infrequently grown and are therefore likely to benefit from rhizobial inoculation. In these situations, soil constraints such as acidity, particularly when combined with practices such as dry sowing or the application of pesticides to seed, can profoundly affect the success of nodulation and subsequent performance of the pulse crop. The work undertaken in this project aims to select improved rhizobial strains for hostile soils and develop inoculation practices that minimise the potential impact of fertiliser and crop protection applications, to maximise rhizobial survival, nodulation and nodule function. These improvements will broaden the adaptation of pulses to soil types and areas where they are currently not widely grown. A comprehensive case for the replacement of rhizobia strain WSM-1455 with strain SRDI-969 for faba, tick and broad bean (Group F) has been endorsed by the National Rhizobium Steering Committee, paving the way for its use in commercial inoculants in 2023. The new strain is being tested by 19 growers in 2022. A DNA test to measure rhizobia number in soil for three inoculant groups (E/F, N and G/S) has been released to growers via the SARDI PREDICTA® platform. Publications, including Inoculating Legumes: Practice and Science, have been revised.
Project start date:
30/05/2018
Project end date:
22/08/2023
Crop type:
  • All Pulses, (Legume)
Organisation
The University of Adelaide
Region:
North, South, West
Project status
status icon Completed

GRDC News

Resources

New Group F Rhizobia Inoculant for Faba and Broad Bean

New Group F Rhizobia Inoculant for Faba and Broad Bean

1689256800000 Factsheet DPI1901-002RTX, UOA1805-017RTX, UMU1901-002RTX

Acid tolerant rhizobia improve nodulation of faba and broad bean.

New Group E Rhizobia Inoculant for Field Pea, Lentil and Vetch

New Group E Rhizobia Inoculant for Field Pea, Lentil and Vetch

1689256800000 Factsheet DPI1901-002RTX, UOA1805-017RTX, UMU1901-002RTX

Acid tolerant rhizobia improve nodulation of pea, lentil and vetch.

Inoculating legumes: The Back Pocket Guide

Inoculating legumes: The Back Pocket Guide

1685628000000 Publication MSF1806-002SAX, UOA1805-017RTX

A practical back pocket guide to inoculating legumes

Inoculating legumes: practice and science

Inoculating legumes: practice and science

1685628000000 Publication MSF1806-002SAX, UOA1805-017RTX

Atmospheric nitrogen (N) is fixed by symbiotic root-nodule bacteria (rhizobia) associated with pasture and pulse legumes and has a national value of about $3.5 billion annually.

Paddock Practices: Sowing legumes in acidic soils – the steps to success

Paddock Practices: Sowing legumes in acidic soils – the steps to success

1646053200000 Paddock Practices MSF1806-002SAX, UOA1805-017RTX

Grain growers intending to sow legume crops in acidic soils are advised to adopt a strategic approach to inoculation to optimise nodulation.