Evaluation of calcium ammonium nitrate and urea-based fertilisers applied to grassland in Ireland
Paper
Paper/Presentation Title | Evaluation of calcium ammonium nitrate and urea-based fertilisers applied to grassland in Ireland |
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Presentation Type | Paper |
Authors | Antille, D. L. (Author), Hoekstra, N. J. (Author), Ernfors, M. (Author), Richards, K. (Author) and Lalor, S. T. J. (Author) |
Journal or Proceedings Title | American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2013) |
Journal Citation | 5, pp. 4329-4352 |
Number of Pages | 24 |
Year | 2013 |
Place of Publication | St. Joseph, MI. United States |
ISBN | 9781627486651 |
Digital Object Identifier (DOI) | https://doi.org/10.13031/aim.20131620284 |
Conference/Event | American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2013) |
Event Details | American Society of Agricultural and Biological Engineers Annual International Meeting (ASABE 2013) Parent American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE Event Date 21 to end of 24 Jul 2013 Event Location Kansas City, United States |
Abstract | This study investigated the influence of N source and rate, and timing of N application on dry matter yield (DMY), N responses, N uptake and N use efficiency (NUE) in a grass crop. The experiment used three fertiliser treatments: CAN, urea and nBTPT-coated urea (nBTPT-U), three N rates (0 - control, 25, 50 and 75kg ha-1), and 18 fertiliser application timings. The agronomic performance of urea was lower than CAN in early spring. This included relatively lower N responses, lower relative DMY (90%) and N uptake (85%) which translated in lower NUE (0.45 vs. 0.70kg kg-1). For N applications later in the spring both urea and nBTPT-U showed relative DMY and NUE which were within ±5% compared with CAN (100%). nBTPT enhanced the overall performance of urea which was shown with increased temperature towards the summer or increased N rates. In the summer, the efficiency of urea was lower than CAN or nBTPT-U in all measured parameters. The variability of urea and nBTPT-U as N-sources for grass was comparable to CAN but DMY with urea was ≤95% that of CAN (100%) at 8 out of the 19 application timings. Increasing the application rate of urea-N to offset its relatively lower efficiency may not be recommended since DMY of urea-N relative to CAN decreased with increased N fertilisation levels. However, with the use of nBTPT this may be possible, but fertiliser choice needs to be based on the relative costs per unit N. |
Keywords | calcium ammonium nitrate; fertiliser use efficiency; nBTPT; temperate grassland; urea |
ANZSRC Field of Research 2020 | 300206. Agricultural spatial analysis and modelling |
300499. Crop and pasture production not elsewhere classified | |
300202. Agricultural land management | |
Public Notes | © (2013) by the American Society of Agricultural & Biological Engineers. For information about securing permission to reprint or reproduce a technical presentation, please contact ASABE at |
Byline Affiliations | National Centre for Engineering in Agriculture |
Teagasc Agriculture and Food Development Authority, Ireland | |
Swedish University of Agricultural Sciences, Sweden | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2759/evaluation-of-calcium-ammonium-nitrate-and-urea-based-fertilisers-applied-to-grassland-in-ireland
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