Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/106138
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DC Field | Value | Language |
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dc.contributor.author | Mackay, J. | - |
dc.contributor.author | Macdonald, L. | - |
dc.contributor.author | Smernik, R. | - |
dc.contributor.author | Cavagnaro, T. | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Soil Biology and Biochemistry, 2017; 107:50-59 | - |
dc.identifier.issn | 0038-0717 | - |
dc.identifier.issn | 1879-3428 | - |
dc.identifier.uri | http://hdl.handle.net/2440/106138 | - |
dc.description.abstract | As phosphorus (P) fertilisers become increasingly expensive there is a need to find innovative ways to supply crops with P. Organic amendments (OA) can contain high concentrations of total P, although the P is present in various forms. We aimed to determine the forms of P and carbon (C) in a range of OA and the effect of these OA on soil microbial biomass, P release, arbuscular mycorrhizal (AM) colonisation, and plant P uptake. Four OA were investigated: two chicken litters (CHK-STR and CHK-SD, one with straw bedding and one with sawdust bedding), a pig litter (PIG-STR) and a municipal waste compost (COMP). An incubation experiment and a plant growth experiment were conducted in which OA and INORG-P were supplied at 15 mg P kg−1 soil and a zero P control was included. All OA had high P concentrations and did not result in an increase in the soil microbial biomass C. There were few temporal changes in available P throughout the incubation experiment suggesting that solubilisation and/or mineralisation of P occurred at a similar rate as conversion of P to unusable forms. Of the OA, PIG-STR had the largest proportion of orthophosphate P and bicarbonate extractable P, and it provided the most P to plants. While CHK-STR had a higher proportion of orthophosphate P and bicarbonate extractable P than CHK-SD, both CHK-STR and CHK-SD provided plants with similar amounts of P. This could be because CHK-SD had a higher proportion of phytate, which can be rapidly mineralised to orthophosphate, and/or because plants in the CHK-SD had higher rates of arbuscular mycorrhizal (AM) colonisation compared with CHK-STR. This study provides new insights into plant and microbial responses to OA which could help in the development of sustainable food production systems. | - |
dc.description.statementofresponsibility | J.E. Mackay, L.M. Macdonald, R.J. Smernik, T.R. Cavagnaro | - |
dc.language.iso | en | - |
dc.publisher | Elsevier | - |
dc.rights | © 2016 Elsevier Ltd. All rights reserved. | - |
dc.source.uri | http://dx.doi.org/10.1016/j.soilbio.2016.12.008 | - |
dc.subject | Phosphorus; organic amendments; diffusive gradients in thin films (DGT); microbial biomass carbon; nuclear magnetic resonance spectroscopy; wheat | - |
dc.title | Organic amendments as phosphorus fertilisers: chemical analyses, biological processes and plant P uptake | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.soilbio.2016.12.008 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/FT120100463 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Smernik, R. [0000-0001-6033-5855] | - |
dc.identifier.orcid | Cavagnaro, T. [0000-0002-9922-5677] | - |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 3 |
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hdl_106138.pdf | Accepted version | 546.51 kB | Adobe PDF | View/Open |
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