Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1059229
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dc.contributor.authorSANTA-ANNA, S. A. C. dept_BR
dc.contributor.authorJANTALIA, C. P.pt_BR
dc.contributor.authorSA, J. M.pt_BR
dc.contributor.authorVILELA, L.pt_BR
dc.contributor.authorMARCHAO, R. L.pt_BR
dc.contributor.authorALVES, B. J. R.pt_BR
dc.contributor.authorURQUIAGA, S.pt_BR
dc.contributor.authorBODDEY, R. M.pt_BR
dc.date.accessioned2016-12-23T11:11:11Zpt_BR
dc.date.available2016-12-23T11:11:11Zpt_BR
dc.date.created2016-12-23pt_BR
dc.date.issued2016pt_BR
dc.identifier.citationNutrient Cycling in Agroecosystems, December 2016.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1059229pt_BR
dc.descriptionAbstract: In Brazil?s central savanna region, government policy is to encourage the conversion of conventional plough tillage (PT) agriculture to no-till (NT) and raise the productivity of under-utilized pastures, including their conversion to integrated crop-livestock (ICL) systems, with the objective of increasing soil organic carbon (SOC) at the expense of atmospheric carbon dioxide. An experiment was established in 1991 by liming and fertilizing at two levels an area of native vegetation (NV). The treatments, replicated in randomized plots, included pastures, continuous cropping and ICL systems under PT or NT. The aim of this study was to quantify the SOC accumulation to 100 cm depth under these treatments over time. The high C:N ratios suggested that there was a high proportion of charcoal present in the soil. Increasing fertilizer inputs had no overall significant effect on SOC stocks. Stocks of SOC changed little under pastures. Analyses of ¹³C abundance showed that higher fertilizer inputs increased the decomposition rate of C derived from NV under pure grass pastures. Continuous cropping under NT preserved SOC and under PT there were significant losses. The highest SOC stocks were found under ILP treatments, but not all ILP treatments accumulated SOC even under NT. These results indicate that government initiatives to substitute PT with NT and to intensify beef cattle production will have only modest short-term gains in SOC accumulation.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectAbundância de Carbonopt_BR
dc.subjectSequestro de carbonopt_BR
dc.subjectSistema de criação de gado integradopt_BR
dc.subjectPastagens tropicaispt_BR
dc.titleChanges in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2017-01-09T11:11:11Zpt_BR
dc.subject.thesagroCerradopt_BR
dc.subject.thesagroCarvãopt_BR
dc.subject.thesagroLeguminosa Forrageirapt_BR
dc.subject.thesagroSolopt_BR
dc.format.extent220 p.pt_BR
riaa.ainfo.id1059229pt_BR
riaa.ainfo.lastupdate2017-01-09pt_BR
dc.contributor.institutionSelenobaldo A. C. de Sant-Anna, Universidade Federal Rural do Rio de Janeiro; CLAUDIA POZZI JANTALIA, CNPAB; Jerusa M. Sa, Universidade Federal Rural do Rio de Janeiro; LOURIVAL VILELA, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; BRUNO JOSE RODRIGUES ALVES, CNPAB; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; ROBERT MICHAEL BODDEY, CNPAB.pt_BR
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