Fixing more N by improving inoculant performance in sub-optimal conditions

Belinda Hackney, Jessica Rigg, Francesca Galea, Simon Flinn, Ewan Leighton, Daryl Reardon, Barry Haskins, Rachael Whitworth, Colin McMaster, Alan Stevenson

    Research output: Book chapter/Published conference paperConference paperpeer-review

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    There are three key considerations in achieving successful nodulation of legumes. Firstly, the host plant needs to be suited to the conditions in which it is grown. Secondly, there needs to be a sufficient number of a compatible strain of rhizobia for the host plant. Thirdly, there needs to be capacity for communication (signalling) between the host plant and the rhizobia for root infection and nodulation to occur. Suboptimal conditions including soil acidity, aridity, low clay content of soil, inadequate nutrient availability (for the host plant and the rhizobia) and/or the presence of herbicide residues can impact the host plant, the rhizobia and/or the interaction of plant and rhizobia thus reducing the formation of an effective symbiosis and reducing potential nitrogen fixation. Nodulation and nitrogen fixation are not a given when growing legumes. Legumes that don’t form an effective symbiosis use nitrogen (N) from the soil pool rather than contributing to building soil N.
    Original languageEnglish
    Title of host publicationGrains research update
    Subtitle of host publicationDriving profit through research
    Number of pages6
    Publication statusPublished - 11 Mar 2020
    EventGRDC Grains Research Update (Lake Cargelligo) - Lake Cargelligo Bowling Club, Lake Cargelligo, Australia
    Duration: 11 Mar 202011 Mar 2020


    ConferenceGRDC Grains Research Update (Lake Cargelligo)
    Abbreviated titleDriving Profit Through Research
    CityLake Cargelligo
    OtherNew research that’s ready for the paddock in 2020 at the Lake Cargelligo GRDC Grains Research Update. Discuss how to make practical use of the latest information with researchers, agronomists and leading growers.
    New frontiers in cereal breeding for a changing climate - long coleoptile wheat, crop competitive varieties, new wheat types for late sowing windows and adaptation to high temperature stress during grain fill. Greg Rebetzke (CSIRO)
    Drivers of yield stability in wheat and barley- picking a winner in variable seasons. David Burch (NSW DPI)
    Pulses in Lake Cargelligo farming systems. Tony Swan (CSIRO)
    Fixing more N by improving inoculant performance in suboptimal / acid soil conditions. Belinda Hackney (NSW DPI)
    Measuring, using and budgeting P in lower rainfall zones - are there options to spend less after a dry year? Graeme Sandral (NSW DPI) and Jim Laycock (Incitec Pivot)
    Lasers, machine learning, weed recognition software and new innovations in weed management. Guy Coleman (USyd)
    Risks and rewards of cover cropping - how effective are cover crops at increasing fallow efficiency and influencing soil health? What about the water they consume - how much do they use and is this offset by increased fallow efficiency? Col McMaster (NSW DPI)
    Decisions for a profitable 2020 - picking the right variety for the situation, managing P fertiliser cost, weed planning and cereal disease after the drought. Discussion session led by Andrew McFadyen (McFadyen Ag. Consulting), Col McMaster (NSW DPI), Graeme Sandral (NSW DPI) and Helen McMillan (CWFS)
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