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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
28/01/2011 |
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Data da última atualização: |
06/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
HEINEMANN, A. B.; STONE, L. F.; FAGERIA, N. K. |
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Afiliação: |
ALEXANDRE BRYAN HEINEMANN, CNPAF; LUIS FERNANDO STONE, CNPAF; NAND KUMAR FAGERIA, CNPAF. |
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Título: |
Transpiration rate response to water deficit during vegetative and reproductive phases of upland rice cultivars. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Scientia Agricola, v. 68, n. 1, p. 24-30, jan./fev. 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Water deficit is one of the most important abiotic stress limiting upland rice yield in the ?Cerrado? region of Brazil. Selecting drought tolerant cultivars is an important strategy to overcome this constraint. Two greenhouse experiments were conducted at Santo Antônio de Goiás, state of Goiás, Brazil, to compare the response of normalized transpiration rate (NTR) of three modern (BRS Primavera, BRSMG Curinga and BRS Soberana) and one traditional (Douradão) upland rice cultivars to soil water deficit during the vegetative and reproductive growth stages. This information will support breeding strategies to improve rice yield in a drought-prone target population environments (TPE) in Brazil. NTR and the total fraction of transpirable soil water (FTSW) were calculated, plotted and adjusted according to a sigmoid non-linear model. The p factor, defined as the fraction of available soil water that can be removed from the root zone before water deficit occurs, was calculated by assuming that it occurs when NTR is equal to 0.95. Modern cultivars had a higher value of p for the reproductive phase than for the vegetative phase. In addition, these cultivars are better adapted to express their potential yield in regions with low intensity and occurrence of water stress and the traditional cultivar is enable to better support adverse conditions of water stress. It can be concluded that there is need to precisely characterize drought patterns in TPEs. This information can focus the breeding program to improve drought tolerance in modern upland rice cultivars. MenosWater deficit is one of the most important abiotic stress limiting upland rice yield in the ?Cerrado? region of Brazil. Selecting drought tolerant cultivars is an important strategy to overcome this constraint. Two greenhouse experiments were conducted at Santo Antônio de Goiás, state of Goiás, Brazil, to compare the response of normalized transpiration rate (NTR) of three modern (BRS Primavera, BRSMG Curinga and BRS Soberana) and one traditional (Douradão) upland rice cultivars to soil water deficit during the vegetative and reproductive growth stages. This information will support breeding strategies to improve rice yield in a drought-prone target population environments (TPE) in Brazil. NTR and the total fraction of transpirable soil water (FTSW) were calculated, plotted and adjusted according to a sigmoid non-linear model. The p factor, defined as the fraction of available soil water that can be removed from the root zone before water deficit occurs, was calculated by assuming that it occurs when NTR is equal to 0.95. Modern cultivars had a higher value of p for the reproductive phase than for the vegetative phase. In addition, these cultivars are better adapted to express their potential yield in regions with low intensity and occurrence of water stress and the traditional cultivar is enable to better support adverse conditions of water stress. It can be concluded that there is need to precisely characterize drought patterns in TPEs. This information can focus the breed... Mostrar Tudo |
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Thesagro: |
Arroz; Deficiência hídrica; Oryza sativa. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/26099/1/v68n1a04.pdf
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Marc: |
LEADER 02144naa a2200181 a 4500
001 1874910
005 2022-06-06
008 2011 bl uuuu u00u1 u #d
100 1 $aHEINEMANN, A. B.
245 $aTranspiration rate response to water deficit during vegetative and reproductive phases of upland rice cultivars.$h[electronic resource]
260 $c2011
520 $aWater deficit is one of the most important abiotic stress limiting upland rice yield in the ?Cerrado? region of Brazil. Selecting drought tolerant cultivars is an important strategy to overcome this constraint. Two greenhouse experiments were conducted at Santo Antônio de Goiás, state of Goiás, Brazil, to compare the response of normalized transpiration rate (NTR) of three modern (BRS Primavera, BRSMG Curinga and BRS Soberana) and one traditional (Douradão) upland rice cultivars to soil water deficit during the vegetative and reproductive growth stages. This information will support breeding strategies to improve rice yield in a drought-prone target population environments (TPE) in Brazil. NTR and the total fraction of transpirable soil water (FTSW) were calculated, plotted and adjusted according to a sigmoid non-linear model. The p factor, defined as the fraction of available soil water that can be removed from the root zone before water deficit occurs, was calculated by assuming that it occurs when NTR is equal to 0.95. Modern cultivars had a higher value of p for the reproductive phase than for the vegetative phase. In addition, these cultivars are better adapted to express their potential yield in regions with low intensity and occurrence of water stress and the traditional cultivar is enable to better support adverse conditions of water stress. It can be concluded that there is need to precisely characterize drought patterns in TPEs. This information can focus the breeding program to improve drought tolerance in modern upland rice cultivars.
650 $aArroz
650 $aDeficiência hídrica
650 $aOryza sativa
700 1 $aSTONE, L. F.
700 1 $aFAGERIA, N. K.
773 $tScientia Agricola$gv. 68, n. 1, p. 24-30, jan./fev. 2011.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Roraima. Para informações adicionais entre em contato com cpafrr.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Roraima. |
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Data corrente: |
31/01/2008 |
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Data da última atualização: |
08/03/2012 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
XAUD, H. M.; XAUD, M. R.; BARBOSA, R. I. |
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Afiliação: |
Haron Abrahim Magalhães Xaud, CPAF-RR; Maristela Ramalho Xaud, CPAF-RR; Reinaldo Imbrózio Barbosa, INPA. |
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Título: |
Aquecimento global: aspectos gerais. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: Infobibos. Disponivel em: . Acesso em: 01 mar. 2007. |
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Idioma: |
Português |
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Notas: |
Disponível também em: Zoonews; CREARR; Roraima em foco; Cultivar; Conexão Roraima; Folhabv.com.br; |
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Palavras-Chave: |
Aquecimento global; Aspectos gerais. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00609naa a2200169 a 4500
001 1691328
005 2012-03-08
008 2007 bl --- 0-- u #d
100 1 $aXAUD, H. M.
245 $aAquecimento global$baspectos gerais.
260 $c2007
500 $aDisponível também em: Zoonews; CREARR; Roraima em foco; Cultivar; Conexão Roraima; Folhabv.com.br;
653 $aAquecimento global
653 $aAspectos gerais
700 1 $aXAUD, M. R.
700 1 $aBARBOSA, R. I.
773 $tIn: Infobibos. Disponivel em: <http://www.infobibos.com/Artigos/2007_1/Aquecimento1/Index.htm>. Acesso em: 01 mar. 2007.
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Embrapa Roraima (CPAF-RR) |
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