Data/hora: 22/06/2024 02:12:48

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 30/08/2016
Data da última atualização: | 24/05/2017
Autoria: | CANTO, M. W. do; ALMEIDA, G. M. de; COSTA, A. C. S. da; BARTH NETO, A.; SCALIANTE JUNIOR, J. R.; ORLANDINI, C. F.
Afiliação: | MARCOS WEBER DO CANTO, Universidade Estadual de Maringá; GLEICE MENEZES DE ALMEIDA, UFPR; ANTONIO CARLOS SARAIVA DA COSTA, Universidade Estadual de Maringá; ARMINDO BARTH NETO, UFPR; JOÃO RICARDO SCALIANTE JÚNIOR, Universidade Estadual de Maringá; CARLA FARIA ORLANDINI, Universidade Estadual de Maringá.
Título: | Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates.
Ano de publicação: | 2016
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 51, n. 6, p. 766-775, jun. 2016.
Idioma: | Inglês
Notas: | Título em português: Produção de sementes de capim?mombaça submetido a diferentes datas de rebaixamento e doses de nitrogênio.
Conteúdo: | The objective of this work was to evaluate the effects of closing cut dates (CCD) and nitrogen (N) rates on the components of pure seed yield (PSY) and seed quality in 'Mombasa' grass (Megathyrsus maximus 'Mombaça'), besides determining the parameters of apparent N efficiency (ANE) and agronomic N efficiency (AgNE). The field experiments were carried out over two growing seasons, 2010/2011 and 2011/2012, in Umuarama, PR, Brazil. The folllowing treatments were evaluated: CCD on October 10, January 31, February 15, and March 1; and N doses at 0, 75, 150, and 225 kg ha?1. Significant interactions between the CCD and N doses were observed for the panicle tiller number (PTN), pure seeds per panicle, PSY, ANE and AgNE. Values of ANE and AgNE were better for 150 kg N ha?1. There were no effects of CCD and N doses on seed quality. PSY was closely correlated with PTN, pure seeds per panicle, and pure seed number.The CCD treatments of longer growth duration and higher N doses showed the higher PSY. Final CCD delaying until February and N availability reduced yield. Closing cut date and N fertilization affect pure seed yield and yield component responses of 'Mombasa' grass.
Palavras-Chave: | Agronomic nitrogen efficiency; Apparent nitrogen efficiency; Eficiência agronômica de nitrogênio; Eficiência aparente de nitrogênio; Qualidade de semente; Rendimento de semente.
Thesaurus Nal: | Seed quality; Seed yield.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/146885/1/Seed-production-of-Mombasa.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (59919-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS