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Provide guidance of efficient use of cattle slurry & FYM as nutrient sources .... (New code NT1404) - NT0604

Description
See NT1404.

NT0604. Grassland manuring. Nitrogen loss and efficiency from use of organic manures.

The most cost effective outlet for animal manures from livestock production is disposal to land; however losses of manure nutrients can occur direct to run-off and via leaching and these require control. Research is needed to quantify the effects of grassland application of organic manures on nitrate leaching. This information will assist development of guidelines for organic manure application to grassland in nitrate sensitive areas. This study will aim to provide guidance on efficient use of cattle slurry and farmyard manure as nutrient sources for grassland and forage crops with respect to control of nitrate leaching. Nitrate leaching and nitrogen efficiency will be quantified from cumulative applications of organic manures over several years on medium textured, sandy and shallow chalk soils. Subsequent release of nitrogen from mineralisation of organic manures will be quantified. The amount of nitrate leaching resulting from cattle slurry application followed by cropping with forage maize will be estimated. Studies will also be conducted with the aim of defining cut off dates between which organic manures should not be applied to grassland on sandy or shallow chalk soils. Overall, it is anticipated that this research will contribute to the understanding of the factors influencing nitrogen cycling in grassland systems and the amounts of nitrogen moving down different pathways, and will provide a useful base for developing future work on the effects of ammonia loss on atmospheric pollution.
Objective
To provide guidance on the efficient use of cattle slurry and farmyard manure (FYM) as nutrient sources for grassland and forage crops with respect to control of nitrate leaching. To quantify nitrate leaching and nitrogen efficiency from cumulative applications of organic manures over several years on medium textured soils (GR09/019) and sandy and shallow chalk soils (GR09/023). To quantify the subsequent release of nitrogen from mineralisation of organic manures on nitrate leaching and the responsiveness to fertiliser nitrogen (GR09/023). To provide an estimate of the amount of nitrate leaching where cattle slurry application is followed by cropping with forage maize. To define cut off dates between which organic manures should not be applied to grassland on sandy or shallow chalk soils.
Time-Scale and Cost
From: 1989

To: 1995

Cost: £902,000
Contractor / Funded Organisations
ADAS UK Ltd.
Keywords
              
Fields of Study
Fertilisers and Nitrate Pollution