Comparative analysis of exchangeable aluminum in a tropical soil under long-term no-till cultivation

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorOklahoma State University-
Autor(es): dc.contributorDom Bosco Catholic University-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorLakehead University-
Autor(es): dc.creatorAntonangelo, João Arthur-
Autor(es): dc.creatorNeto, Jayme Ferrari-
Autor(es): dc.creatorCosta Crusciol, Carlos Alexandre-
Autor(es): dc.creatorZhang, Hailin-
Autor(es): dc.creatorAlleoni, Luís Reynaldo F.-
Autor(es): dc.creatorKinrade, Stephen D.-
Data de aceite: dc.date.accessioned2025-08-21T17:19:32Z-
Data de disponibilização: dc.date.available2025-08-21T17:19:32Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.still.2021.105242-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/222806-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/222806-
Descrição: dc.descriptionAluminum toxicity is a key determinant of crop yield for acid soils. Techniques used to characterize a soil's exchangeable Al content often yield discordant results, thus impeding the implementation of corrective measures. We critically compared three such techniques – back-titration, ICP-AES, and 27Al NMR – for a tropical Oxisol under long-term (8-years) no-till cultivation involving four different cropping-systems and three pH control regimens. ICP-AES was superior in terms of accuracy, level of quantification (LOQ), practicable pH range, speed, cost, and versatility. By comparison, back-titration consistently overestimated exchangeable Al, whereas 27Al-NMR, though accurate, had a higher LOQ and is inherently non-quantitative between pH 5.4 and 6.3 owing to extreme quadrupolar broadening of Al(OH)n(H2O)6−n(3̶−n)+ (n = 1–3) signals. The only Al species detected by NMR in any of the soil extracts was the toxic Al hexaaqua cation, Al(H2O)63+, despite an appreciable presence of dissolved organic matter. Application of either dolomitic lime or calcium-magnesium silicate (CMS) as a pH corrective significantly decreased exchangeable Al in the upper soil layers. None of the decrease, however, was attributable to insoluble aluminosilicates having formed as a consequence of CMS dissolution. Rotation crops of wheat (T. aestivum) and showy rattlebox (C. spectabilis) depleted exchangeable Al in the upper soil layers, whereas palisade grass (Brachiaria brizantha) had no discernable effect on Al availability. Plots which incorporated any one of the three rotation crops provided equally high yields of soybean in year-8 when pH (1 M KCl) exceeded 4.9 ± 0.2 and Al saturation was less than 25 ± 5% (AlICP ≤ 22 ± 21 mg kg−1), on average, in the 0–20 cm soil horizon.-
Descrição: dc.descriptionNatural Sciences and Engineering Research Council of Canada-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionDepartment of Plant and Soil Sciences Oklahoma State University-
Descrição: dc.descriptionDom Bosco Catholic University-
Descrição: dc.descriptionDepartment of Crop Science College of Agricultural Science São Paulo State University (UNESP) R. José Barbosa de Barros-
Descrição: dc.descriptionDepartment of Soil Science Luiz de Queiroz College of Agriculture University of Sao Paulo-
Descrição: dc.descriptionDepartment of Chemistry Lakehead University-
Descrição: dc.descriptionDepartment of Crop Science College of Agricultural Science São Paulo State University (UNESP) R. José Barbosa de Barros-
Descrição: dc.descriptionFAPESP: 2011/10566-6-
Descrição: dc.descriptionFAPESP: 2013/02000-8-
Descrição: dc.descriptionFAPESP: 2013/18594-4-
Descrição: dc.descriptionFAPESP: 2013/18694-9-
Descrição: dc.descriptionFAPESP: 2014/08768-8-
Idioma: dc.languageen-
Relação: dc.relationSoil and Tillage Research-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subject27Al-NMR-
Palavras-chave: dc.subjectAluminum-
Palavras-chave: dc.subjectBack-titration-
Palavras-chave: dc.subjectChemical speciation-
Palavras-chave: dc.subjectNo-till-
Palavras-chave: dc.subjectSoil amendments-
Título: dc.titleComparative analysis of exchangeable aluminum in a tropical soil under long-term no-till cultivation-
Tipo de arquivo: dc.typelivro digital-
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