Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/110443
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Evaluation of phosphorus in thermally converted sewage sludge: P pools and availability to wheat |
Author: | Mackay, J. Cavagnaro, T. Jakobsen, I. Macdonald, L. Grønlund, M. Thomsen, T. Müller-Stöver, D. |
Citation: | Plant and Soil: international journal on plant-soil relationships, 2017; 418(1-2):307-317 |
Publisher: | Springer |
Issue Date: | 2017 |
ISSN: | 0032-079X 1573-5036 |
Statement of Responsibility: | Jessica E. Mackay, Timothy R. Cavagnaro, Iver Jakobsen, Lynne M. Macdonald, Mette Grønlund, Tobias P. Thomsen, Dorette S. Müller-Stöver |
Abstract: | Aims: Dried sewage sludge (SS) and the by-products of four SS thermal conversion processes (pyrolysis, incineration and two types of gasification) were investigated for phosphorus (P) availability. Methods: A sequential extraction was used to determine the distribution of P among different P pools. After mixing materials with soil, availability of the P was determined with soil P extractions and in a growth experiment with wheat. Results: Thermally converted SS contained a greater proportion of P within recalcitrant pools than dried SS. Despite having very different P pool distributions, the incinerated and dried SS provided similar amounts of P to plants. Plant P supply from dried and incinerated SS was lower than the comparable soluble P treatment (50 mg P kg⁻¹), but higher than a soluble treatment at a lower rate (20 mg P kg⁻¹). Plant P uptake in gasified and pyrolysed treatments was only marginally greater than uptake in a control (no P) treatment. Plant P uptake correlated most closely with diffusive gradients in thin films (DGT) P analysis of soil-material mixes. Phosphorus availability in the dried and incinerated SS treatments increased over time. Conclusions: We propose that the dried and incinerated SS have potential as slow release P fertilisers in low pH soils. |
Keywords: | Biochar; bioash; sequential phosphorus extraction; diffusive gradients in thin films (DGT); wheat; sewage sludge |
Rights: | © Springer International Publishing Switzerland 2017 |
DOI: | 10.1007/s11104-017-3298-6 |
Grant ID: | http://purl.org/au-research/grants/arc/FT120100463 |
Published version: | http://dx.doi.org/10.1007/s11104-017-3298-6 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 3 |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
hdl_110443.pdf | Accepted version | 992.98 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.