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dc.contributor.authorFAGOTTI, D. S. L.pt_BR
dc.contributor.authorMIYAUCHI, M. Y. H.pt_BR
dc.contributor.authorOLIVEIRA, A. G.pt_BR
dc.contributor.authorSANTINONI, I. A.pt_BR
dc.contributor.authorEBERHARDT, D. N.pt_BR
dc.contributor.authorNIMTZ, A.pt_BR
dc.contributor.authorRIBEIRO, R. A.pt_BR
dc.contributor.authorPAULA, A. M.pt_BR
dc.contributor.authorQUEIROZ, C. A. S.pt_BR
dc.contributor.authorANDRADE, G.pt_BR
dc.contributor.authorZANGARO, W.pt_BR
dc.contributor.authorNOGUEIRA, M. A.pt_BR
dc.date.accessioned2012-12-03T11:11:11Zpt_BR
dc.date.available2012-12-03T11:11:11Zpt_BR
dc.date.created2012-12-03pt_BR
dc.date.issued2012pt_BR
dc.identifier.citationSoil Use and Management, Oxford, v. 28, n. 3, p. 292-298, Sept. 2012.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/940939pt_BR
dc.descriptionIndicators of soil quality associated with N-cycling were assessed under different land-use systems (native forest ? NAT, reforestation with Araucaria angustifolia or Pinus taeda and agricultural use ? AGR) to appraise the effects on the soil potential for N supply. The soil total N ranged from 2 to 4g⁄ kg (AGR and NAT, respectively), and the microbial biomass N ranged from 80 to 250 mg⁄ kg, being higher in NAT and A. angustifolia, and lower in P. taeda and AGR sites. Activities of asparaginase (ca. 50?200 mg NH 4 + -N ⁄ kg per h), glutaminase (ca. 200?800 mg NH -N ⁄ kg per h) and urease (ca. 80?200 mg NH -N ⁄ kg ⁄ h) were also more intense in the NAT and A. angustifoliareforested soils, indicating greater capacity for N mineralization. The NAT and AGR soils showed the highest and the lowest ammonification rate, respectively (ca. 1 and 0.4 mg NH 4 + -N ⁄ kg per day), but the inverse for nitrification rate (ca. 12 and 26%), indicating a low capacity for N supply, in addition to higher risks of N losses in the AGR soil. A multivariate analysis indicated more similarity between NAT and A. angustifolia-reforested sites, whilst the AGR soil was different and associated with a higher nitrification rate. In general, reforestation with the native species A. angustifolia had less impact than reforestation with the exogenous species P. taeda, considering the soil capacity for N supply. However, AGR use caused more changes, generally decrease in indicators of N-cycling, showing a negative soil management effect on the sustainability of this agroecosystem.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleGradients in N-cycling attributes along forestry and agricultural land-use systems are indicative of soil capacity for N supply.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2013-08-20T11:11:11Zpt_BR
dc.subject.thesagroSolopt_BR
dc.subject.thesagroQualidadept_BR
dc.subject.thesagroNitrificaçãopt_BR
dc.subject.thesagroAmonificaçãopt_BR
dc.subject.nalthesaurusSoil qualitypt_BR
dc.subject.nalthesaurusNitrificationpt_BR
dc.subject.nalthesaurusAmmonificationpt_BR
riaa.ainfo.id940939pt_BR
riaa.ainfo.lastupdate2013-08-20pt_BR
dc.identifier.doi10.1111/j.1475-2743.2012.00418.xpt_BR
dc.contributor.institutionUniversidade Estadual de Londrina- UEL.; Universidade de São Paulo - USP; Universidade Estadual de Londrina - UEL.; Universidade Estadual de Londrina - UEL.; Universidade de São Paulo - USP.; Universidade Estadual de Londrina - UEL.; Universidade Estadual de Londrina - UEL.; Universidade de São Paulo - USP.; Universidade Estadual de Londrina - UEL.; Universidade Estadual de Londrina - UEL.; Universidade Estadual de Londrina - UEL; MARCO ANTONIO NOGUEIRA, CNPSO.pt_BR
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