| Effect of low-molecular-weight organic acids on kinetics release and fractionation of phosphorus in some calcareous soils of western Iran. | |
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MedLine Citation:
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PMID: 23142876 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Organic acid has been related to nutrient mobilization, mainly in phosphorus (P) insoluble utilization, and therefore enhances P bioavailability. In this study, we examined the effect of low-molecular-weight organic acids (malic, citric, and oxalic acids) on P release of some calcareous soils from western Iran. Fractionation and speciation of P in the soil solution were studied at the initial and final P release. Significantly different quantities of P were extracted by the organic acids. On average the maximum (1,554.9 mg kg(-1)) and the minimum (1,260.5 mg kg(-1)) P were extracted by 10 mM oxalic and malic acid, respectively. Power equation described well P release. In the initial stage of P release, the solution samples in soils were supersaturated with respect to hydroxyapatite and β-TCP. At the end of P release, all solutions were undersaturated with phosphate minerals. The percentage of Fe-Al oxide fraction generally increased after P release, while carbonate and residual P fractions were decreased in all organic acids. Compared with the native soils, adding malic and citric acids had no effect on Fe-Al oxide fraction, but oxalic acid significantly reduced this fraction. |
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Authors:
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M Taghipour; M Jalali |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-11-11 |
Journal Detail:
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Title: Environmental monitoring and assessment Volume: - ISSN: 1573-2959 ISO Abbreviation: Environ Monit Assess Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8508350 Medline TA: Environ Monit Assess Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamadan, Iran. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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