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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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Embrapa Arroz e Feijão (CNPAF) |
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| Registros recuperados : 7 | |
| 2. |  | BARROS, J. M.; VASCONCELOS, S. S.; SANTIAGO, W. R.; LEMOS, E. C. de M. Estoque de raízes e serapilheira em diferentes sistemas de produção agropecuária na Amazônia Oriental. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 15., 2011, Belém, PA. A ciência de fazer ciência: anais. Belém, PA: Embrapa Amazônia Oriental, 2011. 1 CD-ROM. PIBIC-2011.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 3. | | LEMOS, E. C. M.; VASCONCELOS, S. S.; BARROS, J. M.; SILVA, A. K. L. Respiração do solo em sistemas de produção agropecuária no Nordeste Paraense. In: SEMINÁRIO GESTABACIAS, 1., 2010, Belém, PA. Resultados de pesquisas em mesobacias do Nordeste paraense e sua aplicação no desenvolvimento rural. Belém, PA: Embrapa Amazônia Oriental: Projeto Gestabacias, 2010. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 5. | | LEMOS, E. C. M.; VASCONCELOS, S. S.; BARROS, J. M.; SILVA, A. K. L.; CARVALHO, C. J. R. de. Variação sazonal da respiração do solo em diferentes sistemas de produção agropecuária na Amazônia Oriental. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 29.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 13.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 11.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 8., 2010, Guarapari. Fontes de nutrientes e produção agrícola: modelando o futuro: anais. Viçosa, MG: SBCS, 2010. FERTBIO 2010.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 6. | | LEMOS, E. C. M.; VASCONCELOS, S. S.; SANTIAGO, M. R.; OLIVEIRA JUNIOR, M. C. M. de; SOUZA, C. M. de A. The responses of soil, litter and root carbon stocks to the conversion of forest regrowth to crop and tree production systems used by smallholder farmers in eastern Amazonia. Soil Use and Management, v. 32, n. 4, p. 504-514, Dec. 2016.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 7. | | FERREIRA, L. P.; HENNING, A. A.; YORINORI, J. T.; FRANÇA NETO, J. de B.; SCHUCK, E.; LEMOS, E. C.; AZEREDO, J. A. D. Ocorrência do míldio (Plasmopara halstedii) em girassol, no Brasil. In: CONGRESSO BRASILEIRO DE SEMENTES, 3., 1983, Campinas. Resumo dos trabalhos técnicos. Brasília: ABRATES, 1983. p. 93.| Biblioteca(s): Embrapa Soja. |
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