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Improving the reliability of unfertilised grass/clover pasture - a proposed mechanism and its test
Reference
D08169
Principal Investigator / Supervisor
Dr Nigel Sackville-Hamilton
Co-Investigators /
Co-Supervisors
Dr Ann Cresswell
,
Dr Lance Mytton
Institution
Inst of Grassland and Environmental Res
Department
Soil Env & Ecology Science (North Wyke)
Funding type
Research
Value (£)
179,888
Status
Completed
Type
Research Grant
Start date
21/01/1998
End date
21/01/2001
Duration
36 months
Abstract
Grass/clover pastures can sustain sward productivity without fertiliser input, because clover replaces lost nitrogen (N) through N-fixation. However, clover content and productivity can be highly variable. Our aim is to increase understanding of the causes of clover variability. A recent model links oscillations in grass/clover varieties, differing the control of N-fixation with respect to soil N availability. These patches will be observed over a period of 2.5 years, during which soil N will be experimentally manipulated. By integrating model and experimental results, we will address how the control of N-fixation can affect grass/clover dynamics and identify ideal genotypes for increased sward productivity and stability.
Summary
unavailable
Committee
Closed Committee - Agri-food (AF)
Research Topics
X – not assigned to a current Research Topic
Research Priority
X – Research Priority information not available
Research Initiative
X - not in an Initiative
Funding Scheme
X – not Funded via a specific Funding Scheme
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