Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1004999
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dc.contributor.authorSLAZAK, A.pt_BR
dc.contributor.authorFREESE, D.pt_BR
dc.contributor.authorMATOS, E. da S.pt_BR
dc.contributor.authorNII-ANNANG, N.pt_BR
dc.contributor.authorHÜTTL, R. F.pt_BR
dc.date.accessioned2015-01-09T11:11:11Zpt_BR
dc.date.available2015-01-09T11:11:11Zpt_BR
dc.date.created2015-01-09pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationJournal of Plant Nutrition and Soil Science, v. 1777, n. 2, p. 159-167, 2014pt_BR
dc.identifier.issn1436-8730pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1004999pt_BR
dc.descriptionDifferences in soil P among silvopasture, grassland, and arable lands have been well established. Nevertheless, most of the reports compare soil properties under long-term sites. Thus, there exists little information on the effect of the conversion of silvopasture to arable or grassland use on soil P pools. The objective of the study was to determine the impact of converting silvopasture system (SP) into arable cropping and grassland system on the distribution of P pools and potential P bioavailability. We compared the following systems: SP system, SP converted to arable cropland (SP-AL), SP converted to grassland (SP-GL), and for comparative purposes, a long-term arable cropland (AL). The P fractionation was performed by a sequential extraction scheme, using acid and alkaline extractants on samples collected from the 0?10 and 10?20&#8201;cm soil layers. It was assumed that the large variations in soil-P fractionations are caused by the different management practices associated with land conversion. The results of P fractionation showed a dominance of calcium-bound P, HCl-extractable Pi constituted up to 36% of the soil total P (TP). However, the type of land use did not affect this P fraction. On the other hand, the reduction in labile-Pi and NaOH-Pi fractions observed at the SP-AL site may have led to the decline in readily available P. The soil total organic P (TPo) content was 8% and 17% lower at SP-AL compared to SP and SP-GL site, respectively. Labile organic-P (labile-Po) content was markedly higher at SP site compared to arable soils, and was &#8776; 10% of TPo. The NaOH-Po constituted the highest fraction of the organic-P pool (55%?79% of TPo) across all the study systems, and was positively correlated with TPo (p < 0.01). The study indicates that conversion of SP system in temperate regions to arable cropping with conventional tillage seems to result in the reduction of P availability compared to SP, indicating SP as an important land-use practice.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.subjectSistema Silvipastorilpt_BR
dc.titlePhosphorus pools in soil after land conversion from silvopasture to arable and grassland usept_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2015-01-09T11:11:11Zpt_BR
dc.subject.thesagroUso da Terrapt_BR
dc.subject.nalthesaurusAgricultural soilspt_BR
dc.subject.nalthesaurusSilvopastoral systemspt_BR
dc.subject.nalthesaurusZoningpt_BR
riaa.ainfo.id1004999pt_BR
riaa.ainfo.lastupdate2015-01-09pt_BR
dc.identifier.doidx.doi.org/10.1002/jpln.201200334pt_BR
dc.contributor.institutionAnna Slazak, Chair of Soil Protection and Recultivation, Brandenburg University of Technology, Cottbus, Germany; Dirk Freese, Chair of Soil Protection and Recultivation, Brandenburg University of Technology, Cottbus, Germany; EDUARDO DA SILVA MATOS, CPAMT; Seth Nii-Annang, Chair of Soil Protection and Recultivation, Brandenburg University of Technology, Cottbus, Germany; Reinhard F. Hüttl, Helmholtz-Centre Potsdam - GFZ, German Research Centre for Geosciences, Telegrafenberg, Germany.pt_BR
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