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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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Tipo/Formato |
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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: |
19/12/2022 |
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Data da última atualização: |
19/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
CHAGAS, P. C.; CHAGAS, E. A.; CRANE, J. H.; VENDRAME, W.; CHAMBERS, A.; COSTA, B. N. S.; RÚBIO NETO, A. |
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Afiliação: |
POLLYANA C. CHAGAS, UNIVERSIDADE FEDERAL DE RORAIMA (UFRR); EDVAN ALVES CHAGAS, CPAF-RR; JONATHAN H. CRANE, UNIVERSITY OF FLORIDA; WAGNER VENDRAME, UNIVERSITY OF FLORIDA; ALAN CHAMBERS, UNIVERSITY OF FLORIDA; BARBARA N. S. COSTA, IFGO; AURÉLIO RÚBIO NETO, INSTITUTO FEDERAL GOIANO. |
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Título: |
Effect of naphthalene acetic acid, gibberellic acid, and spray adjuvant alone or in conjunction with hand pollination on fruit set and quality of 'LeahReese' sugar apple (Annona squamosa L.). |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Scientia Horticulturae, v. 299, art. 111011, 2022. |
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DOI: |
https://doi.org/10.1016/j.scienta.2022.111011 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate the effect of GA3 and NAA plant growth regulators, LI 700® adjuvant and hand pollination on fruit set and quality of 'LeahReese' sugar apple under subtropical conditions. The randomized block design had 14 treatments, 10 replicates and 3 flowers per treatment per tree. For quality evaluation, 9 fruits from each treatment were used, with 3 replicates and 3 fruits per replicate. |
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Palavras-Chave: |
Fruit production; Phyto-regulators. |
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Thesagro: |
Annona Squamosa. |
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Thesaurus NAL: |
Parthenocarpy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01288naa a2200253 a 4500
001 2149904
005 2022-12-19
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.scienta.2022.111011$2DOI
100 1 $aCHAGAS, P. C.
245 $aEffect of naphthalene acetic acid, gibberellic acid, and spray adjuvant alone or in conjunction with hand pollination on fruit set and quality of 'LeahReese' sugar apple (Annona squamosa L.).$h[electronic resource]
260 $c2022
520 $aThe objective of this study was to evaluate the effect of GA3 and NAA plant growth regulators, LI 700® adjuvant and hand pollination on fruit set and quality of 'LeahReese' sugar apple under subtropical conditions. The randomized block design had 14 treatments, 10 replicates and 3 flowers per treatment per tree. For quality evaluation, 9 fruits from each treatment were used, with 3 replicates and 3 fruits per replicate.
650 $aParthenocarpy
650 $aAnnona Squamosa
653 $aFruit production
653 $aPhyto-regulators
700 1 $aCHAGAS, E. A.
700 1 $aCRANE, J. H.
700 1 $aVENDRAME, W.
700 1 $aCHAMBERS, A.
700 1 $aCOSTA, B. N. S.
700 1 $aRÚBIO NETO, A.
773 $tScientia Horticulturae$gv. 299, art. 111011, 2022.
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Embrapa Roraima (CPAF-RR) |
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