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Whole farming systems studies. Nitrogen flows and losses in grassland systems - farmlet studies (Previously NT0802) - NT1806

It has been reported that UK grasslands provide a potential way in which nitrate and gaseous N forms may be dispersed into the environment. This study will build on previous research and will measure grassland farmlet systems in order to provide information on N flows and nitrate losses on a range of grassland management systems. 1 hectare farmlet systems will be set up, maintained and improved to enable a total approach to N cycling studies and nitrate loss measurements based on beef production. Conventional N management systems will also be compared with improved systems, particularly with regard to effects on different soil types. Detailed nitrate loss data will then be obtained using either ceramic cup samplers or large scale lysimeter approaches. Estimates of denitrification and ammonia volatilization losses will be provided to produce annual budgets for N inputs, outputs, internal transfer and losses. Data will be used to improve, extend and validate the grassland NCYCLE model which will allow prediction and identification of new approaches. Such a holistic approach to N cycling studies using the farmlet system allows fully integrated effects to be considered within an experimentally manageable context and at a scale which facilitates manipulation and replication.
Time-Scale and Cost
From: 1995

To: 1998

Cost: £804,510
Contractor / Funded Organisations
Institute of Grassland and Environment Research (IGER)
Fields of Study
Fertilisers and Nitrate Pollution