Predicting nitrogen availability and losses following application of organic manures to arable land: MANNER

Soil Use and Management - Tập 15 Số 3 - Trang 137-143 - 1999
B. J. Chambers1, E.I. Lord2, F. A. Nicholson1, K. A. Smith2
1ADAS Gleadthorpe Research Centre, Meden Vale, Mansfield, Nottinghamshire, NG20 9PF, UK. Fax (+44) 1623 844472.
2ADAS Wolverhampton, Woodthorne, Wergs Road, Wolverhampton, WV6 8TQ, UK. Fax (+44) 1902 693166. E-mail: [email protected]

Tóm tắt

Abstract. A decision support system to predict the plant availability of nitrogen (N) following organic manure applications to land has been developed, drawing together the latest UK research information on factors affecting manure N availability and losses. The ADAS MANure Nitrogen Evaluation Routine (MANNER) accounts for manure N analysis, ammonia volatilization, nitrate leaching and mineralization of manure organic N. Only a few easily available inputs are required to predict the amount of N volatilized or leached, and the fertilizer N value for the next crop grown. Predictions from MANNER have been evaluated by comparison with independently collected data from a range of experimental studies where pig, cattle and poultry manures were applied to arable crops. Good agreement was found (r2 60–79%, P<0.001), confirming that MANNER can provide a reliable estimate of the fertilizer N value of farm manures spread to arable land under a range of conditions.

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Soil Use and Management

Tập 15 Số 3

137-143

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