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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
30/07/2004 |
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Data da última atualização: |
04/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FISCHER, A. J.; RAMIREZ, H. V.; GIBSON, K. D.; PINHEIRO, B. da S. |
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Afiliação: |
ALBERT J. FISCHER; HECTOR V. RAMIREZ; KEVIN D. GIBSON; BEATRIZ DA SILVEIRA PINHEIRO, CNPAF. |
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Título: |
Competitiveness of semidwarf upland rice cultivars against palisadegrass (Brachiaria brizantha) and signalgrass (B. decumbens). |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Agronomy Journal, v. 93, n. 5, p. 967-973, Sept./Oct. 2001. |
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DOI: |
https://doi.org/10.2134/AGRONJ2001.935967X |
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Idioma: |
Inglês |
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Conteúdo: |
When savannas in Latin America are brought into cultivation, rice (Oryza saliva L.) can be sown with the perennial grasses palisadegrass [Brachiaria brizantha (Hochst. ex A. Rich) Stapfl and signalgrass (B. decumbens Stapf) to harvest a grain crop while establishing a pasture to suppress weeds and provide grazing in subsequent years. However, these Brachiaria spp. can reduce upland rice yields. Rice cultivars need to be competitive with Brachiaria spp. to maintain yields but must allow Brachiaria spp. sufficient growth for pasture establishment. Field studies were conducted during 1994 and 1995 on a Typic Haplustox oxisol soil in the Eastern Plains of Colombia to evaluate the competitiveness of upland rice cultivars and to identify rice traits for competitiveness. Ten (1994) and 14 (1995) upland rice cultivars were grown with and without signalgrass in 1994 and palisadegrass in 1995. Rice cultivars differed substantially in their competitiveness. Rice yield losses ranged from 18 to 55%, and Brachiaria aboveground biomass ranged from 1.4 to 3.2 Mg ha -1 dry mass. Competition for light was critical; rice photon flux density interception, leaf area index [>_45 d after emergence (DAE)], and number of tillers (>_60 DAE) were correlated with competitiveness. No tradeoff between high yield potential and competitiveness was detected in these upland rice cultivars. Early maturity of rice is a desired characteristic for the rice-Brachiaria spp. association. The development of more-competitive cultivars appears to be a viable approach for reducing herbicide dependency and improving profitability of Latin American rice-pasture intercropping systems. MenosWhen savannas in Latin America are brought into cultivation, rice (Oryza saliva L.) can be sown with the perennial grasses palisadegrass [Brachiaria brizantha (Hochst. ex A. Rich) Stapfl and signalgrass (B. decumbens Stapf) to harvest a grain crop while establishing a pasture to suppress weeds and provide grazing in subsequent years. However, these Brachiaria spp. can reduce upland rice yields. Rice cultivars need to be competitive with Brachiaria spp. to maintain yields but must allow Brachiaria spp. sufficient growth for pasture establishment. Field studies were conducted during 1994 and 1995 on a Typic Haplustox oxisol soil in the Eastern Plains of Colombia to evaluate the competitiveness of upland rice cultivars and to identify rice traits for competitiveness. Ten (1994) and 14 (1995) upland rice cultivars were grown with and without signalgrass in 1994 and palisadegrass in 1995. Rice cultivars differed substantially in their competitiveness. Rice yield losses ranged from 18 to 55%, and Brachiaria aboveground biomass ranged from 1.4 to 3.2 Mg ha -1 dry mass. Competition for light was critical; rice photon flux density interception, leaf area index [>_45 d after emergence (DAE)], and number of tillers (>_60 DAE) were correlated with competitiveness. No tradeoff between high yield potential and competitiveness was detected in these upland rice cultivars. Early maturity of rice is a desired characteristic for the rice-Brachiaria spp. association. The development of more-com... Mostrar Tudo |
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Thesagro: |
Arroz; Brachiaria Brizantha; Oryza Sativa. |
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Thesaurus Nal: |
rice. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02372naa a2200217 a 4500
001 1212443
005 2022-04-04
008 2001 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.2134/AGRONJ2001.935967X$2DOI
100 1 $aFISCHER, A. J.
245 $aCompetitiveness of semidwarf upland rice cultivars against palisadegrass (Brachiaria brizantha) and signalgrass (B. decumbens).$h[electronic resource]
260 $c2001
520 $aWhen savannas in Latin America are brought into cultivation, rice (Oryza saliva L.) can be sown with the perennial grasses palisadegrass [Brachiaria brizantha (Hochst. ex A. Rich) Stapfl and signalgrass (B. decumbens Stapf) to harvest a grain crop while establishing a pasture to suppress weeds and provide grazing in subsequent years. However, these Brachiaria spp. can reduce upland rice yields. Rice cultivars need to be competitive with Brachiaria spp. to maintain yields but must allow Brachiaria spp. sufficient growth for pasture establishment. Field studies were conducted during 1994 and 1995 on a Typic Haplustox oxisol soil in the Eastern Plains of Colombia to evaluate the competitiveness of upland rice cultivars and to identify rice traits for competitiveness. Ten (1994) and 14 (1995) upland rice cultivars were grown with and without signalgrass in 1994 and palisadegrass in 1995. Rice cultivars differed substantially in their competitiveness. Rice yield losses ranged from 18 to 55%, and Brachiaria aboveground biomass ranged from 1.4 to 3.2 Mg ha -1 dry mass. Competition for light was critical; rice photon flux density interception, leaf area index [>_45 d after emergence (DAE)], and number of tillers (>_60 DAE) were correlated with competitiveness. No tradeoff between high yield potential and competitiveness was detected in these upland rice cultivars. Early maturity of rice is a desired characteristic for the rice-Brachiaria spp. association. The development of more-competitive cultivars appears to be a viable approach for reducing herbicide dependency and improving profitability of Latin American rice-pasture intercropping systems.
650 $arice
650 $aArroz
650 $aBrachiaria Brizantha
650 $aOryza Sativa
700 1 $aRAMIREZ, H. V.
700 1 $aGIBSON, K. D.
700 1 $aPINHEIRO, B. da S.
773 $tAgronomy Journal$gv. 93, n. 5, p. 967-973, Sept./Oct. 2001.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
25/02/2013 |
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Data da última atualização: |
10/11/2022 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
MARTINEZ, G. B.; DIAS FILHO, M. B. |
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Afiliação: |
GLADYS BEATRIZ MARTINEZ, CPATU; MOACYR BERNARDINO DIAS FILHO, CPATU. |
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Título: |
Respostas morfofisiológicas de gramíneas de várzea sob inundação e sombreamento. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
In: CONGRESSO LATINOAMERICANO DE SISTEMAS AGROFLORESTAIS PARA A PRODUÇÃO PECUÁRIA SUSTENTÁVEL, 7., 2012, Belém, PA. Sistemas silvipastoris, o caminho para a economia verde na pecuária mundial. Belém, PA: UFPA, 2012. |
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Idioma: |
Português |
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Thesagro: |
Anóxia; Gramínea; Sombreamento; Várzea. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/103456/1/6706.pdf
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Marc: |
LEADER 00654nam a2200157 a 4500
001 1950922
005 2022-11-10
008 2012 bl uuuu u00u1 u #d
100 1 $aMARTINEZ, G. B.
245 $aRespostas morfofisiológicas de gramíneas de várzea sob inundação e sombreamento.$h[electronic resource]
260 $aIn: CONGRESSO LATINOAMERICANO DE SISTEMAS AGROFLORESTAIS PARA A PRODUÇÃO PECUÁRIA SUSTENTÁVEL, 7., 2012, Belém, PA. Sistemas silvipastoris, o caminho para a economia verde na pecuária mundial. Belém, PA: UFPA$c2012
650 $aAnóxia
650 $aGramínea
650 $aSombreamento
650 $aVárzea
700 1 $aDIAS FILHO, M. B.
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