Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge

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dc.contributor.authorNogueirol, Roberta Corra
dc.contributor.authorMelo, Wanderley José De [UNESP]
dc.contributor.authorBertoncini, Edna Ivani
dc.contributor.authorAlleoni, Lus Reynaldo Ferracci
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionSão Paulo State Agribusiness Technology Agency
dc.date.accessioned2022-04-29T15:03:57Z
dc.date.available2022-04-29T15:03:57Z
dc.date.issued2015-01-01
dc.description.abstractUrban wastes such as sewage sludge can be an economically viable alternative source for providing macro- and micronutrients to plants in tropical conditions. Sewage sludge is normally rich in phosphorus (P), which is present in soils mainly in organic forms, so that it is very important to establish methods for estimating its availability to plants. This study aimed to test three extractants that simulate P-uptake by maize (Zea mays) cropped in plots after 13 consecutive years of fertilization with sewage sludge, in a cycle of fertilized sugarcane (Saccharum L.) amended with sewage sludge and organic compost. Soil samples were collected at depths of 0-10, 10-20, and 20-40 cm in March 2010 from the two experimental areas. Soil P was extracted via ion exchange resin, Mehlich-I, and 0.025 M HOand determined via colorimetry. Maize and sugarcane diagnostic leaves were collected in the experiments, subjected to nitric-perchloric digestion, and the leaf-P content was determined via colorimetry. No significant correlations were found between phosphorus extracted from soils and phosphorus concentrations in diagnostic leaves. Resin extracted larger amounts of P in the short-term experiment, while acidic extractants yielded larger amounts in the long-term experiment.en
dc.description.affiliationDepartment of Soil Science, University of São Paulo (ESALQ/USP), P.O. Box 9
dc.description.affiliationDepartment of Technology, São Paulo State University
dc.description.affiliationSão Paulo State Agribusiness Technology Agency
dc.description.affiliationDepartment of Soil Science, ESALQ/USP
dc.description.affiliationUnespDepartment of Technology, São Paulo State University
dc.identifierhttp://dx.doi.org/10.1155/2015/720167
dc.identifier.citationApplied and Environmental Soil Science, v. 2015.
dc.identifier.doi10.1155/2015/720167
dc.identifier.issn1687-7675
dc.identifier.issn1687-7667
dc.identifier.scopus2-s2.0-84929649000
dc.identifier.urihttp://hdl.handle.net/11449/232404
dc.language.isoeng
dc.relation.ispartofApplied and Environmental Soil Science
dc.sourceScopus
dc.titleEffectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludgeen
dc.typeArtigo

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