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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
17/07/1996 |
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Data da última atualização: |
17/07/1996 |
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Autoria: |
THANGARAJ, M.; O'TOOLE, J. C.; DE DATTA, S. K. |
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Título: |
Root response to water stress in rainfed lowland rice. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Experimental Agriculture, v.26, n.3, p.287-296, 1990. |
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Idioma: |
Inglês |
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Conteúdo: |
The relation between soil mechanical inpedance as a result of soil drying , and root system growth (mass and length density) of rice was investigated in greenhouse and field studies. In a greenhouse experiment,soil drying for 16 days increased mechanical impedance in the 0-20cm soil layer from near 0 to 2.5Mpa, and decreased root growth by 47% compared to the continuously flooded control. Root length density decreased with decreasing soil moisture and increasing soil mechanical impedance. In a lowland field experiment using a sprinkler irrigation gradient treatment for 19 days during the vegetative growth stage, soil mechanical impedance as low as 0.01 MPa inhibited root growth while values greater than 0.3 - 0.5 MPa decreased root growth and extension by75%. The relative loss of potential root growth was continued after reflooding. Root length density, measured as flowering, was linearly related to yield. |
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Palavras-Chave: |
Root; Stress hidrico. |
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Thesagro: |
Arroz; Oryza Sativa; Raiz. |
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Thesaurus Nal: |
rice; water stress. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01487naa a2200229 a 4500
001 1077883
005 1996-07-17
008 1990 bl --- 0-- u #d
100 1 $aTHANGARAJ, M.
245 $aRoot response to water stress in rainfed lowland rice.
260 $c1990
520 $aThe relation between soil mechanical inpedance as a result of soil drying , and root system growth (mass and length density) of rice was investigated in greenhouse and field studies. In a greenhouse experiment,soil drying for 16 days increased mechanical impedance in the 0-20cm soil layer from near 0 to 2.5Mpa, and decreased root growth by 47% compared to the continuously flooded control. Root length density decreased with decreasing soil moisture and increasing soil mechanical impedance. In a lowland field experiment using a sprinkler irrigation gradient treatment for 19 days during the vegetative growth stage, soil mechanical impedance as low as 0.01 MPa inhibited root growth while values greater than 0.3 - 0.5 MPa decreased root growth and extension by75%. The relative loss of potential root growth was continued after reflooding. Root length density, measured as flowering, was linearly related to yield.
650 $arice
650 $awater stress
650 $aArroz
650 $aOryza Sativa
650 $aRaiz
653 $aRoot
653 $aStress hidrico
700 1 $aO'TOOLE, J. C.
700 1 $aDE DATTA, S. K.
773 $tExperimental Agriculture$gv.26, n.3, p.287-296, 1990.
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Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
17/02/2003 |
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Data da última atualização: |
17/02/2003 |
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Autoria: |
RIBEIRO, J. F. |
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Título: |
O uso de computadores para elaborar apresentacoes cientificas. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
In: ENCONTRO DE BOTANICOS DO CENTRO OESTE, 2., 1993, Corumba. Resumos. Brasilia: SBB: SBB/RCO: CNPq: EMBRAPA-CPAC, 1993. p. 44. |
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Idioma: |
Português |
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Thesagro: |
Cerrado; Computador; Programa de Computador. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00487naa a2200145 a 4500
001 1566259
005 2003-02-17
008 1993 bl uuuu u00u1 u #d
100 1 $aRIBEIRO, J. F.
245 $aO uso de computadores para elaborar apresentacoes cientificas.
260 $c1993
650 $aCerrado
650 $aComputador
650 $aPrograma de Computador
773 $tIn: ENCONTRO DE BOTANICOS DO CENTRO OESTE, 2., 1993, Corumba. Resumos. Brasilia: SBB: SBB/RCO: CNPq: EMBRAPA-CPAC, 1993. p. 44.
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Embrapa Cerrados (CPAC) |
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