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Project Code [2023IE-NZ492]
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Project title
Reducing nitrous oxide emissions from ruminant systems through accelerating nitrification inhibition in ryegrass and plantain mixed pastures.
Primary Funding Agency
DAFM
Co-Funding Organisation(s)
Lead Organisation
Teagasc
Lead Applicant
Not listed
Project Abstract
This joint study focuses on accelerating the potential of Biological Nitrification Inhibition (BNI) capacity in temperate grassland species, particularly in perennial ryegrass and plantain, to reduce nitrous oxide (N2O) emissions from ruminant systems. It involves identifying sources of BNI activity in ryegrass through screening the perennial ryegrass genetic resource collection and developing screening tools for introducing BNI capacity into ryegrass cultivars. The influence of different soils, particularly those with contrasting fertility and microbial communities on BNI trait expression in perennial ryegrass will be investigated. The interactive expression of the BNI trait in mixed swards of plantain and ryegrass will be examined to determine the consequences of plant species co-existence on BNI trait expression, potentially paving the way for establishing low-N2O mixed swards in New Zealand and Ireland. Proof of function studies will determine the effect of plantain on nitrogen excretion patterns by investigating direct and indirect N2O emissions from urine under various combinations of urine volumes, nitrogen concentrations, and proportions of plantain in the diet of grazing animals. The N2O emission results will be used alongside existing Irish and NZ data and analysed in a process-based model to refine Irish and New Zealand N2O emission factors and the nitrate leaching and ammonia volatilisation fractions of urine, based on key driving variables. A comprehensive knowledge transfer implementation plan will be developed with all key stakeholders to maximise the impact of the results of the project. The study will help accelerate the potential of BNI in temperate grasslands to reduce N2O emissions, offering opportunities for sustainable, non chemical, plant-based practices to reduce GHG emissions from ruminant systems in Ireland and New Zealand.
Grant Approved
�1,050,129.00
Research Hub
Climate Change
Research Theme
3. Climate Solutions, Transition Management and Opportunities
Initial Projected Completion Date
29/02/2028