Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1012912
Registro completo de metadados
Campo DCValorIdioma
dc.contributor.authorPEREIRA, L. E. T.pt_BR
dc.contributor.authorPAIVA, A. J.pt_BR
dc.contributor.authorGUARDA, V. D. A.pt_BR
dc.contributor.authorPEREIRA, P. de M.pt_BR
dc.contributor.authorCAMINHA, F. O.pt_BR
dc.contributor.authorSILVA, S. C. dapt_BR
dc.date.accessioned2015-04-07T11:11:11Zpt_BR
dc.date.available2015-04-07T11:11:11Zpt_BR
dc.date.created2015-04-07pt_BR
dc.date.issued2015pt_BR
dc.identifier.citationScientia Agricola, Piracicaba, v. 72, n. 2, p. 114-123, Mar./Apr. 2015.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1012912pt_BR
dc.descriptionNitrogen fertiliser accelerates plant growth and increases herbage utilisation efficiency in continuously stocked temperate grass swards, indicating greater herbage production and harvest efficiency. There is no similar evidence, however, for tropical pastures. In this study we evaluated the morphogenetic responses, the patterns of defoliation and the efficiency of herbage utilisation of continuously stocked marandu palisade grass (Brachiaria brizantha (Hochst. ex A. Rich.) Stapf. cv. Marandu) maintained at 30 cm by cattle and fertilised with nitrogen. Treatments corresponded to four measures of nitrogen application (0, 150, 300 and 450 kg ha?1), and were assigned to experimental units (1,200 m2 paddocks) according to a randomised complete block design, with four replications. There was a seasonal pattern of variation in the morphogenetic responses and in herbage utilisation efficiency (HUE) characterised by higher herbage growth rates and HUE during late spring and summer. Nitrogen fertilisation increased both leaf appearance and elongation rates (around 60 % between non-fertilised and swards fertilised with 450 kg ha?1, p < 0.05), requiring higher stocking rates (average of 1.6, 2.6, 2.9 and 3.1 Animal Unit (adult animal weighing 450 kg) ha?1 for 0, 150, 300 and 450 kg ha?1, respectively) to maintain the management target. Although the frequency of leaf defoliation increased (with no change in defoliation severity - 56.1 ± 1.88 %), the leaf lifespan decreased, resulting in a similar number of defoliations during the leaf lifespan (average of 0.91 ± 0.069). This resulted in increased HUE only for the 150 kg ha?1 treatment relative to non-fertilisation (37.5, 48.1, 44.0 and 44.5 ± 2.25 % for 0, 150, 300 and 450 kg ha?1 N, respectively), indicating that with nitrogen fertilisation rates above 150 kg ha?1, there are compensatory mechanisms related to morphogenetic responses that buffer changes in utilisation efficiency.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.titleHerbage utilisation efficiency of continuously stocked marandu palisade grass subjected to nitrogen fertilisation.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2015-04-07T11:11:11Zpt_BR
dc.subject.thesagroBrachiaria brizanthapt_BR
dc.subject.thesagroFertilizante nitrogenadopt_BR
dc.subject.thesagroManejopt_BR
dc.subject.thesagroForragempt_BR
dc.subject.nalthesaurusGrazing managementpt_BR
dc.subject.nalthesaurusDefoliationpt_BR
dc.subject.nalthesaurusForagept_BR
riaa.ainfo.id1012912pt_BR
riaa.ainfo.lastupdate2015-04-07pt_BR
dc.identifier.doi10.1590/0103-9016-2014-0013pt_BR
dc.contributor.institutionLILIAN ELGALISE TECHIO PEREIRA, USP; ADENILSON JOSE PAIVA, ESALQ; VITOR DEL ALAMO GUARDA, CNPASA; PRISCILA DE MESQUITA PEREIRA, ESALQ; FABIO OLEGARIO CAMINHA, ESALQ; SILA CARNEIRO DA SILVA, ESALQ.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CNPASA)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
sa.pdf829,57 kBAdobe PDFThumbnail
Visualizar/Abrir
Mostrar registro simples do item Visualizar estatísticas

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace