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dc.contributor.authorBarro, Raquel Santiagopt_BR
dc.contributor.authorVarella, Alexandre Costapt_BR
dc.contributor.authorLemaire, Gillespt_BR
dc.contributor.authorMedeiros, Renato Borges dept_BR
dc.contributor.authorSaibro, Joao Carlos dept_BR
dc.contributor.authorNabinger, Carlospt_BR
dc.contributor.authorBangel, Felipe Villamilpt_BR
dc.contributor.authorCarassai, Igor Justinpt_BR
dc.date.accessioned2014-07-23T02:07:57Zpt_BR
dc.date.issued2012pt_BR
dc.identifier.issn1516-3598pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/98481pt_BR
dc.description.abstractThe successful achievement of a highly productive understorey pasture in silvopastoral systems depends on the use of well-adapted forage genotypes, showing good agronomic performance and persistence under shading and grazing. In this study, the herbage dry matter yield (DMY) and nitrogen nutrition dynamics were determined in three native warmseason grasses (Paspalum regnellii, Paspalum dilatatum and Paspalum notatum) and a forage legume (Arachis pintoi) under two shading levels compared with full sun. The experiment was conducted in the Campanha region, Bagé, state of Rio Grande do Sul, Brazil, during two evaluation cycles (2008/2009 and 2009/2010). Three shade cloth levels (0%, 50% and 80% of light restriction) were applied to the forage genotypes in a split plot design, in which shading levels were the main plot and forage genotypes were the subplots, with three replications. P. regnellii showed the highest accumulated DMY (1500 and 1700 g m-2, respectively, for the first and second evaluation cycles) at all shading levels and showed no DMY decreased under the heavy shade (80%). Average DMY over the four genotypes under the 50% shade level was higher or equal compared with full sun. Influence of rainfall was observed on the DMY performance of all genotypes: the positive effect of moderate shading (50%) on P. dilatatum and P. notatum DMY was associated to a low soil water availability status. Increased shading level resulted in high nitrogen nutrition index values on grasses, in comparison with full sun. All genotypes performed well under the moderate shading level, but the DMY of both P. regnellii and P. dilatatum and the herbage N content in P. notatum and A. pintoi of all genotypes stood out, showing that those main genotypes are promising to grow in silvopastoral systems at the Campanha region in southern Brazil.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofRevista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 41, n. 7 (jul. 2012), p. 1589-1597pt_BR
dc.rightsOpen Accessen
dc.subjectArachis pintoien
dc.subjectForragempt_BR
dc.subjectArtificial shadeen
dc.subjectLeguminosa forrageirapt_BR
dc.subjectNitrogen statusen
dc.subjectPaspalum sp.en
dc.subjectSilvopastoral systemen
dc.subjectWarm-season pastureen
dc.titleForage yield and nitrogen nutrition dynamics of warm-season native forage genotypes under two shading levels and in full sunlightpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000899859pt_BR
dc.type.originNacionalpt_BR


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