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https://hdl.handle.net/2440/82514
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Type: | Journal article |
Title: | Phosphorus availability in chicken manure is lower with increased stockpiling period, despite a larger orthophosphate content |
Author: | Peirce, C. Smernik, R. McBeath, T. |
Citation: | Plant and Soil: international journal on plant-soil relationships, 2013; 373(1-2):359-372 |
Publisher: | Kluwer Academic Publ |
Issue Date: | 2013 |
ISSN: | 0032-079X 1573-5036 |
Statement of Responsibility: | C. A. E. Peirce, R. J. Smernik, T. M. McBeath |
Abstract: | Background and aims: The relative proportions of phosphorus (P) forms present in manure will determine the overall availability of manure P to plants; however, the link between the forms of P in manures and manure P availability is unclear. This study compares the bioavailability and P speciation of three manures of different stockpiling duration: less than 1 month, 6 months and 12 months; manures were collected concurrently from a single poultry farm. Methods: Bioavailability to wheat in a glasshouse trial was measured using an isotopic dilution method with manure added at an application rate equivalent to 20 kg P ha-1. Phosphorus speciation was measured by 31P nuclear magnetic resonance (NMR) spectroscopic analysis of NaOH-EDTA extracts of the manures. Results: The addition of all manures significantly increased shoot biomass and P concentration, with the fresh manure having the greatest effect. Addition of the fresh manure resulted in the largest labile P pool, highest manure P uptake and manure P recovery, while the manure stockpiled for 12 months resulted in the lowest manure P uptake and manure P recovery. NMR analysis indicated that there was more monoester organic P, especially phytate, in manure stockpiled for shorter periods, while the proportion of manure P that was orthophosphate increased with stockpiling time. Conclusions: Together, these results imply that although the proportion of total P in the manures detected as orthophosphate was higher with longer stockpiling, only a fraction of this orthophosphate was plant-available. This suggests the availability of P from orthophosphate in manures decreases with longer stockpiling time in much the same way that P from orthophosphate in mineral fertilizer becomes less available in soil over time. © 2013 Springer Science+Business Media Dordrecht. |
Keywords: | Chicken manure Stockpiling Phosphorus availability Isotopic technique NMR spectroscopy |
Rights: | © Springer Science+Business Media Dordrecht 2013 |
DOI: | 10.1007/s11104-013-1807-9 |
Published version: | http://dx.doi.org/10.1007/s11104-013-1807-9 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest |
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