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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
31/07/2000 |
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Data da última atualização: |
19/04/2017 |
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Autoria: |
RAO, V. S. H. |
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Título: |
A representation formula for solution of a certain linear system of generalized differential equations. |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
In: BUSENBERG, S.N.; COOKE, K.L. Differential equations and applications in ecology, epidemics, and population problems. New York: Academic Press, 1981. p.337-342. |
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Idioma: |
Inglês |
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Palavras-Chave: |
Equacao; Equation; Linear system; Sistema linear. |
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Thesagro: |
Estatística. |
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Thesaurus Nal: |
statistics. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00639naa a2200181 a 4500
001 1802517
005 2017-04-19
008 1981 bl --- 0-- u #d
100 1 $aRAO, V. S. H.
245 $aA representation formula for solution of a certain linear system of generalized differential equations.
260 $c1981
650 $astatistics
650 $aEstatística
653 $aEquacao
653 $aEquation
653 $aLinear system
653 $aSistema linear
773 $tIn: BUSENBERG, S.N.; COOKE, K.L. Differential equations and applications in ecology, epidemics, and population problems. New York: Academic Press, 1981. p.337-342.
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Registro original: |
Embrapa Pantanal (CPAP) |
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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. |
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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