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Type: Conference paper
Title: Changes in soil P pools during legume residue decomposition
Author: Alamgir, M.
Marschner, P.
McNeill, A.
Citation: Proceedings: 19th World Congress of Soil Science. Soil solutions for a changing world, Brisbane, Australia, 1-6 August,2010 / R. J. Gilkes and N. Prakongkep (eds.): pp.53-55
Publisher: CSIRO
Publisher Place: DVD
Issue Date: 2010
ISBN: 9780646537832
ISSN: 0038-0717
Conference Name: World Congress of Soil Science (19th : 2010 : Brisbane, Queensland)
Statement of
Md Alamgir, Petra Marschner and Ann McNeill
Abstract: There is a growing interest to find effective management systems to utilise the large unavailable soil P bank resulting from the excess use of P fertiliser and to overcome the associated financial and environmental problems. It has been suggested that legume residues can play a significant role in mobilising soil P forms which are unavailable to many crops. The aim of our experiment is to study the changes in soil P pools during legume residue decomposition. Legume residues with varying P concentrations were added to a sandy loam soil with low P availability and changes in various soil P pools were determined after 14 days. Residue addition increased available P. Residues with lowest C/P ratio (46.9) increased the NaHCO3 extractable inorganic P 4.82 fold compared to the control (22.9 mg /kg). Cumulative respiration over 14 days was higher in soil treated with young residues compared to control and mature residues.
Keywords: C/P ratio; Immobilisation; Inorganic P; Mineralisation; Organic P; P fractionation; Respiration
Rights: © 2010 19th World Congress of Soil Science, Soil Solutions for a Changing World 1 – 6 August 2010, Brisbane, Australia.
DOI: 10.1016/j.soilbio.2012.01.031
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Appears in Collections:Agriculture, Food and Wine publications
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