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Mobile humic substances in soil: sources turnover transfer and role in controlling N dynamics in grassland soils

Reference	D06450
Principal Investigator / Supervisor	Professor Stephen Jarvis
Co-Investigators / Co-Supervisors	Dr M Hayes, Professor David Scholefield
Institution	Inst of Grassland and Environmental Res
Department	Soil Environmental and Ecological Sci
Funding type	Research
Value (£)	197,915
Status	Completed
Type	Research Grant
Start date	06/01/1997
End date	06/01/2000
Duration	36 months

Abstract

The study will examine mobile humic substances in grassland soils and the effects of management on their distributions and characteristics in different components of soil and soil waters. We will base measurements on the long term, hydrologically isolated field lysimeters at NorthWyke which will permit collection of drainage and other waters. Short term rates of mobile humics turnover and transfer into soil waters will be determined in controlled conditions. Effects of fertiliser, drainage, fixation by clover etc will be established in the field system. Natural abundance isotopic characteristics will be a key to identifying sources of mobile humics, rates of transformation and pathways and effects. State of the art analytical methodology will be used to fully characterise these key materials in soil systems which are responsible for substantial exports of N and C, and in the control of N transformation processes.

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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