An enhanced software tool to support better use of manure nutrients: MANNER‐NPK |
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| Authors: | F. A. Nicholson A. Bhogal D. Chadwick E. Gill R. D. Gooday E. Lord T. Misselbrook A. J. Rollett E. Sagoo K. A. Smith R. E. Thorman J. R. Williams B. J. Chambers |
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| Affiliation: | 1. ADAS Gleadthorpe, , Mansfield, Nottinghamshire, NG20 9PD UK;2. School of Environment, Natural Resources and Geography, Bangor University, , Bangor, LA57 2UW UK;3. ADAS Wolverhampton, Pendeford House, , Wolverhampton, WV9 5AP UK;4. Rothamsted Research, , Okehampton, Devon, EX20 2SB UK;5. ADAS Boxworth, , Boxworth, Cambridge, CB23 4NN UK |
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| Abstract: | MANNER‐NPK (MANure Nutrient Evaluation Routine) is a decision support tool for quantifying manure (and other organic material) crop available nutrient supply. The user‐friendly design of an earlier version of MANNER was retained, but in response to user and stakeholder feedback, additional functionality was included to underpin new and revised nitrogen (N) transformation/loss modules (covering ammonia volatilization, nitrate leaching and nitrous oxide/di‐nitrogen emissions, and organic N mineralization) and also to estimate manure phosphorus (as P2O5), potassium (as K2O), sulphur (as SO3) and magnesium (as MgO) supply. Notably, MANNER‐NPK provides N availability estimates for following crops through the mineralization of organic N. Validation of the crop available N supply estimates was undertaken by comparing predicted values with data from more than 200 field experimental measurements. For cattle, pig and poultry manures, there was good agreement (P < 0.001) between predicted and measured fertilizer N replacement values, indicating that MANNER‐NPK provides robust estimates of manure crop available N supply and N losses to the wider environment. |
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| Keywords: | Manures nutrients nitrogen crop availability losses decision support tool |
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