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Improve guidelines on waste management practices which will minimise ..... (New code NT1402) - NT0301

Description
See NT1402.


NT0301. Organic manures and nitrate leaching.

Poor handling and land application of livestock wastes can lead to nutrient loss by run-off and contribute to nitrate leaching and increased levels of nitrates in drinking water. This study will aim to improve guidelines on waste management practices which will minimise the short- and long-term risk of nitrate leaching from animal manures applied to arable crops. Efficient and environmentally sound methods will be developed for the following: utilisation of pig and cattle manures as an N source for winter and spring cereals; use of poultry manure as an N source for winter cereals; and utilisation of N in poultry manures applied to arable land prior to root crops, including quantification of the residual effects on subsequent cereal crops. The short and long term contribution of cattle, pig and poultry manures to the N requirements of arable crop rotations will be evaluated. Cut off dates will be defined, before which various types of manure should not be applied to NSAs and the benefits of winter cover crops in minimising nitrate leaching losses from autumn/winter-applied manures will be assessed. The improved efficiency of animal wastes as a source of N, when applied to arable crops in the spring, will be verified on a field scale and N mineralisation from applied organic (part) manures will be evaluated in relation to crop demand and nitrate leaching potential. Data obtained in this study will contribute to further understanding of the N cycle and the fate of manure N following land application.
Objective
To develop efficient and environmentally sound methods of utilising pig and cattle manures as a nitrogen source for winter and spring cereals. Complete field work, harvest 1993 . To develop efficient and environmentally sound methods of using poultry manure as a nitrogen source for winter cereals. Data collection, manipulation and analysis. Publication paper. To develop efficient methods of utilising N in poultry manures applied to arable land prior to root crops, including quantifying the residual effects on subsequent cereal crops. To evaluate the short and long term contribution of cattle, pig and poultry manures to the nitrogen requirements of arable crop rotations. To define cut-off date before which various types of manures should not be applied in NSAs. To assess the benefit of winter cover crops in minimising nitrate leaching losses from autumn/winter applied manures. To verify on a field scale, the improved efficiency of animal wastes as a source of N, when applied to arable crops in the spring. To evaluate nitrogen mineralisation from applied organic manures in relation to crop demand and nitrate leaching potential. To develop a simple working model/decision support system for predicting crop N availability and losses following applications of organic manures to land . To quantity P and nitrate losses and examine organic and microbiological contamination of surface water following organic manure applications to medium fine textured soils. Also to identify practices likely to reduce surface runoff losses. To quantify P and nitrate leaching losses following the application of organic manures to drained clay soils in low rainfall areas. Also to assess the extent of organic and microbiological contamination of drainage water following manure applications.
Time-Scale and Cost
From: 1991

To: 1995

Cost: £1,528,000
Contractor / Funded Organisations
ADAS UK Ltd.
Keywords
              
Fields of Study
Fertilisers and Nitrate Pollution