Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/110450
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Type: | Journal article |
Title: | Hybrid brown coal-urea fertiliser reduces nitrogen loss compared to urea alone |
Author: | Saha, B. Rose, M. Wong, V. Cavagnaro, T. Patti, A. |
Citation: | Science of the Total Environment, 2017; 601-602:1496-1504 |
Publisher: | Elsevier |
Issue Date: | 2017 |
ISSN: | 0048-9697 1879-1026 |
Statement of Responsibility: | Biplob K. Saha, Michael T. Rose, Vanessa Wong, Timothy R. Cavagnaro, Antonio F. Patti |
Abstract: | Synthetic nitrogen (N) fertilisers, such as urea, are susceptible to rapid dissipation from soil. More gradual release of mineral N from fertiliser may reduce the off-site movement of mineral N, thereby enhancing N supply to crops and minimising negative off-site impacts. We hypothesised that granulation of urea with humified brown coal (BC) delays mineral N release and maintains higher concentrations of N in soil than conventional urea granules. Four different brown coal-urea granules, with C:N ratios of 1‐10, were prepared by pan granulation. Advanced spectroscopic and X-ray powder diffraction (XRD) techniques confirmed loading of urea-N into the BC structure. Nitrogen-release from BCU granules was slower than from urea, resulting in higher N retention over a longer period for increasing growth and N uptake by crop plants. This trend increased with higher loading of BC, emphasising the significant role of BC in N retention. These findings support the hypothesis that BC is suitable for developing slow release N fertilisers. |
Keywords: | Brown coal Fertiliser N use efficiency Pan granulation Slow release fertiliser Urea |
Rights: | © 2017 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.scitotenv.2017.05.270 |
Grant ID: | http://purl.org/au-research/grants/arc/FT120100463 |
Published version: | http://dx.doi.org/10.1016/j.scitotenv.2017.05.270 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 3 |
Files in This Item:
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hdl_110450.pdf | Accepted version | 1.6 MB | Adobe PDF | View/Open |
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