Dynamics of phosphorus fractions in soils treated with dairy manure

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dc.contributor.authorBraos, L. B. [UNESP]
dc.contributor.authorBettiol, A. C.T. [UNESP]
dc.contributor.authorDi Santo, L. G. [UNESP]
dc.contributor.authorFerreira, M. E. [UNESP]
dc.contributor.authorCruz, M. C.P. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCiência e Tecnologia Do sul de Minas Gerais
dc.date.accessioned2020-12-12T01:54:17Z
dc.date.available2020-12-12T01:54:17Z
dc.date.issued2020-01-01
dc.description.abstractThe evaluation of phosphorus (P) transformations in soil after application of manure or mineral P can improve soil management and optimise P use by plants. The objectives of the present study were to assess organic and inorganic P forms in two soils treated with dairy manure and triple superphosphate and to establish relationships between soil P fraction levels and P availability. Soil organic and inorganic P fractions were quantified using a pot experiment with two soils, a typical Hapludox and an arenic Hapludult, with three types of fertiliser treatments applied (no fertiliser application, application of dairy manure, and application of triple superphosphate, by adding 100 mg P dm-3 in the form of fertiliser in the two latter treatments) and four incubation times (15, 45, 90, and 180 days). Inorganic P was fractionated into aluminium-bound, iron-bound, occluded, and calcium-bound P. Organic P was extracted sequentially using sodium bicarbonate, hydrochloric acid, microbial biomass, sodium hydroxide, and residual organic P. After incubation, maize plants were cropped to quantify dry matter yield and absorbed P. Application of dairy manure resulted in a significant increase in most of the organic P fractions, and application of triple superphosphate led to a significant increase in inorganic P fractions. Both fertilisers raised labile organic P fractions in the two soils. The major sinks of P in Hapludox were occluded and fulvic acid-associated P. In contrast, the major sink of P in Hapludult was iron-bound P. The available P levels were stable after application of dairy manure, and decreased with time when fertilised with triple superphosphate. In the Hapludox, the organic P fractions had a significant positive correlation with P uptake by plants. The results suggest that organic P mineralisation plays a more significant role in plant P uptake in the Hapludox soil and inorganic P forms are the main contributors to plant P uptake in the Hapludult soil.en
dc.description.affiliationDepartamento de Solos e Adubos Faculdade de Ciências Agrárias e Veterinárias UNESP-Univ Estadual Paulista, Via de acesso Prof. Paulo Donato Castellane s/n
dc.description.affiliationInstituto Federal de Educação Ciência e Tecnologia Do sul de Minas Gerais Campus Machado, Rod. Machado-Paraguaçu, km 3
dc.description.affiliationDepartamento de Clínica e Cirurgia Veterinária Faculdade de Ciências Agrárias e Veterinárias UNESP-Univ Estadual Paulista, Via de acesso Prof. Paulo Donato Castellane s/n
dc.description.affiliationUnespDepartamento de Solos e Adubos Faculdade de Ciências Agrárias e Veterinárias UNESP-Univ Estadual Paulista, Via de acesso Prof. Paulo Donato Castellane s/n
dc.description.affiliationUnespDepartamento de Clínica e Cirurgia Veterinária Faculdade de Ciências Agrárias e Veterinárias UNESP-Univ Estadual Paulista, Via de acesso Prof. Paulo Donato Castellane s/n
dc.format.extent289-298
dc.identifierhttp://dx.doi.org/10.1071/SR18325
dc.identifier.citationSoil Research, v. 58, n. 3, p. 289-298, 2020.
dc.identifier.doi10.1071/SR18325
dc.identifier.issn1838-675X
dc.identifier.scopus2-s2.0-85078209918
dc.identifier.urihttp://hdl.handle.net/11449/199974
dc.language.isoeng
dc.relation.ispartofSoil Research
dc.sourceScopus
dc.subjectnuclear magnetic resonance
dc.subjectorganic fertiliser
dc.subjectphosphorus availability
dc.subjectphosphorus pools
dc.titleDynamics of phosphorus fractions in soils treated with dairy manureen
dc.typeArtigo
unesp.author.orcid0000-0001-8166-7867 0000-0001-8166-7867[1]

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Artigos - Solos e Adubos - FCAV
Artigos - Clínica e Cirurgia Veterinária - FCAV