Labile N and the nitrogen management index of oxisols in the Brazilian cerrados

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cg.coverage.countryBrazil
cg.coverage.iso3166-alpha2BR
cg.coverage.regionLatin America
cg.coverage.regionSouth America
cg.identifier.urlhttp://ciat-library.ciat.cgiar.org/Articulos_Ciat/biblioteca/Sustainable_land_management_for_the_oxis.pdf#page=142en
cg.subject.ciatLAND USEen
cg.subject.ciatSOIL HEALTHen
cg.subject.ciatSOIL LANDSCAPESen
dc.contributor.authorWesterhof, Ren
dc.contributor.authorVilela, Lourivalen
dc.contributor.authorAyarza, Miguel Angelen
dc.contributor.authorZech, W.en
dc.date.accessioned2015-01-28T14:17:28Zen
dc.date.available2015-01-28T14:17:28Zen
dc.identifier.urihttps://hdl.handle.net/10568/55133
dc.titleLabile N and the nitrogen management index of oxisols in the Brazilian cerradosen
dcterms.abstractThe effect of land use on the availability of soil nitrogen (N) was studied by separating total soil N into one labile and one stable fraction by oxidation and extraction of labile N with potassium permanganate. The nitrogen management index (NMI) was calculated according to Blair et al. (1995) for the carbon management index. In all systems, labile N released by potassium permanganate was a better indicator for nitrogen availability than were total and stable N. The NMI was a good indicator for N availability but gave no information on the total amount of N. In land-use system analysis, total N and labile N can be used together as a simple and rapid way to evaluate the nitrogen status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuous cropping systems studied, total N contents decreased, compared with native savanna. The availability of N under legume-based pastures and legume-based pasture/crop rotations was higher than under native savanna and continuous cropping systems.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationWesterhof, Roelof; Vilela, Lourival; Ayarza, Miguel Angel; Zech, Wolfgang. 1999. Labile N and the nitrogen management index of oxisols in the Brazilian cerrados. In: Thomas, Richard J.; Ayarza, Miguel Angel (eds.). Sustainable land management for the oxisols of the Latin American savannas: Dynamics of soil organic matter and indicators of soil quality. Centro Internacional de Agricultura Tropical (CIAT), Cali, CO. p. 133-140. (CIAT publication no. 312)en
dcterms.extentp. 133-140en
dcterms.issued1999
dcterms.languageen
dcterms.publisherInternational Center for Tropical Agricultureen
dcterms.subjectsavannasen
dcterms.subjectland useen
dcterms.subjectmineralizationen
dcterms.subjectnitrogen contenten
dcterms.subjectoxisolsen
dcterms.subjectpotassium permanganateen
dcterms.subjectsabanasen
dcterms.subjectutilización de la tierraen
dcterms.subjectmineralizaciónen
dcterms.subjectcontenido de nitrógenoen
dcterms.subjectoxisolesen
dcterms.subjectpermanganato de potasioen
dcterms.typeBook Chapter

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