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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: |
07/11/1994 |
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Data da última atualização: |
23/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PEREIRA, P. A. A.; MIRANDA, B. D.; ATTEWELL J. R.; KMIECIK, K. A.; BLISS, F. A. |
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Afiliação: |
PEDRO ANTONIO ARRAES PEREIRA, CNPAF. |
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Título: |
Selection for increased nodule number in common bean (Phaseolus vulgaris L.). |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Plant and Soil, v. 148, n. 2, p. 203-209, Jan. 1993. |
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DOI: |
https://doi.org/10.1007/BF00012858 |
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Idioma: |
Inglês |
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Conteúdo: |
Common bean (Phaseolus vulgaris L.) plants were grown for 21-28 days in plastic container-modified Leonard jar assemblies and placed in a controlled-environment room. The nodules on each plant were removed, counted; selected plants were repotted, grown and intercrossed to produce progenies for the next cycle of recurrent selection. Among the ten parent lines, Puebla 152 and WBR 22-34 produced the most nodules and Rio Tibagi and Negro Argel the fewest, when averaged over five experiments. An analysis of number of nodules on F1 plants resulting from crosses made in a partial diallel design among the ten parents revealed highly significants variation for general combining ability (GCA) but not for specific combining ability (SCA). After three cycles of recurrent selection for nodule number per plant, the mean nodule number was 211% of the mean for the 10 parents control. Total nodule weight on selected plants also increased, but individual nodule weight decreased. Nineteen C1 and 18 C2 lines resulting from the individual plants selected for greater nodule number, along with the ten parents and two non-nodulating soybean lines included as non-fixing check plants were grown in a single experiment in a low-N field. C2 lines on average accumulated significantly more N per plant than either the parents or C1 lines, providing evidence for increased N2 fixation measured by the N difference method. These data show that more nodules, possibly resulting from greater susceptibility to nodulation, are an important, heritable component of symbiosis and that selection for increased nodule number resulted in lines capable of fixing more atmospheric N2. MenosCommon bean (Phaseolus vulgaris L.) plants were grown for 21-28 days in plastic container-modified Leonard jar assemblies and placed in a controlled-environment room. The nodules on each plant were removed, counted; selected plants were repotted, grown and intercrossed to produce progenies for the next cycle of recurrent selection. Among the ten parent lines, Puebla 152 and WBR 22-34 produced the most nodules and Rio Tibagi and Negro Argel the fewest, when averaged over five experiments. An analysis of number of nodules on F1 plants resulting from crosses made in a partial diallel design among the ten parents revealed highly significants variation for general combining ability (GCA) but not for specific combining ability (SCA). After three cycles of recurrent selection for nodule number per plant, the mean nodule number was 211% of the mean for the 10 parents control. Total nodule weight on selected plants also increased, but individual nodule weight decreased. Nineteen C1 and 18 C2 lines resulting from the individual plants selected for greater nodule number, along with the ten parents and two non-nodulating soybean lines included as non-fixing check plants were grown in a single experiment in a low-N field. C2 lines on average accumulated significantly more N per plant than either the parents or C1 lines, providing evidence for increased N2 fixation measured by the N difference method. These data show that more nodules, possibly resulting from greater susceptibility to nod... Mostrar Tudo |
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Thesagro: |
Feijão; Fixação de Nitrogênio; Nitrogênio; Nódulo; Phaseolus Vulgaris; Rhizobium; Seleção Recorrente. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02435naa a2200265 a 4500
001 1198080
005 2024-01-23
008 1993 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/BF00012858$2DOI
100 1 $aPEREIRA, P. A. A.
245 $aSelection for increased nodule number in common bean (Phaseolus vulgaris L.).$h[electronic resource]
260 $c1993
520 $aCommon bean (Phaseolus vulgaris L.) plants were grown for 21-28 days in plastic container-modified Leonard jar assemblies and placed in a controlled-environment room. The nodules on each plant were removed, counted; selected plants were repotted, grown and intercrossed to produce progenies for the next cycle of recurrent selection. Among the ten parent lines, Puebla 152 and WBR 22-34 produced the most nodules and Rio Tibagi and Negro Argel the fewest, when averaged over five experiments. An analysis of number of nodules on F1 plants resulting from crosses made in a partial diallel design among the ten parents revealed highly significants variation for general combining ability (GCA) but not for specific combining ability (SCA). After three cycles of recurrent selection for nodule number per plant, the mean nodule number was 211% of the mean for the 10 parents control. Total nodule weight on selected plants also increased, but individual nodule weight decreased. Nineteen C1 and 18 C2 lines resulting from the individual plants selected for greater nodule number, along with the ten parents and two non-nodulating soybean lines included as non-fixing check plants were grown in a single experiment in a low-N field. C2 lines on average accumulated significantly more N per plant than either the parents or C1 lines, providing evidence for increased N2 fixation measured by the N difference method. These data show that more nodules, possibly resulting from greater susceptibility to nodulation, are an important, heritable component of symbiosis and that selection for increased nodule number resulted in lines capable of fixing more atmospheric N2.
650 $aFeijão
650 $aFixação de Nitrogênio
650 $aNitrogênio
650 $aNódulo
650 $aPhaseolus Vulgaris
650 $aRhizobium
650 $aSeleção Recorrente
700 1 $aMIRANDA, B. D.
700 1 $aATTEWELL J. R.
700 1 $aKMIECIK, K. A.
700 1 $aBLISS, F. A.
773 $tPlant and Soil$gv. 148, n. 2, p. 203-209, Jan. 1993.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado; Embrapa Milho e Sorgo. |
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Data corrente: |
11/07/2022 |
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Data da última atualização: |
11/07/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
SILVA, A. F. da; PADRÃO, V. A.; CONCENÇO, G.; GALON, L.; ASPIAZÚ, I. |
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Afiliação: |
ALEXANDRE FERREIRA DA SILVA, CNPMS; VITOR ABREU PADRÃO, Universidade Federal de São João Del-Rei; GERMANI CONCENCO, CPACT; LEANDRO GALON, Universidade Federal da Fronteira Sul; IGNACIO ASPIAZÚ, Universidade Estadual de Minas Gerais. |
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Título: |
Control efficacy and phytosociological characterization of weeds as a function of post-emergence herbicides applied to maize. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Revista Brasileira de Milho e Sorgo, v. 21, e1240, 2022. |
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DOI: |
https://doi.org/10.18512/rbms2022v21e1240 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT - Studies evaluating the effectiveness of herbicides on weed control, coupled with the sustainability of the weed management system, are of great importance. The present study aims to evaluate the efficacy of post-emergence herbicides applied to maize while inferring the sustainability of the treatments employing an ecological approach. The experiment was installed in a randomized block design with four replications. The treatments consisted of the application of atrazine at the dose of 1500 g ha-1; atrazine + mesotrione at 1500 + 72 g ha-1; atrazine + tembotrione at 1500 + 100.8 g ha-1; atrazine + nicosulfuron at 1500 + 22.5 g ha-1; atrazine + glyphosate at 1500 g ha-1 + 792.5 g ha-1, in addition to weeded and infested control treatments. The herbicides were applied at the 4 leaf stage of maize. The phytotoxicity and control efficacy was assessed 7, 14, 21, and 28 days after applying treatments (DAT). In addition, a phytosociological survey of all plots was carried out in the last assessment. Herbicides did not cause phytotoxicity symptoms to the crop. However, associations of atrazine with glyphosate and atrazine with tembotrione promoted the greater effectiveness of weed control. Despite being classified as one of the treatments with better effectiveness, the association between glyphosate and atrazine, caused a more significant reduction in the diversity of the plant community, and alternative weed management practices should be applied to maize cropping fields to avoid weed selection.
RESUMO - Estudos avaliando a eficácia de herbicidas no controle de plantas daninhas, aliados à sustentabilidade do sistema de manejo de plantas daninhas, são de grande importância. O presente estudo tem como objetivo avaliar a eficácia de herbicidas pós-emergência aplicados ao milho e inferir a sustentabilidade dos tratamentos utilizando uma abordagem ecológica. O experimento foi instalado em delineamento de blocos casualizados com quatro repetições. Os tratamentos consistiram na aplicação de atrazina na dose de 1500 g ha-1; atrazina + mesotriona a 1500 + 72 g ha-1; atrazina + tembotriona a 1500 + 100,8 g ha-1; atrazina + nicossulfurão a 1500 + 22,5 g ha-1; atrazina + glifosato a 1500 g ha-1 + 792,5 g ha-1, além dos tratamentos de controle capinado e infestado. Os herbicidas foram aplicados no estádio de 4 folhas do milho. A fitotoxicidade e a eficácia do controle foram avaliadas 7, 14, 21 e 28 dias após a aplicação dos tratamentos (DAT). Além disso, na última avaliação foi realizado um levantamento fitossociológico de todas as parcelas. Os herbicidas não causaram sintomas de fitotoxicidade à cultura. No entanto, associações de atrazina com glyphosate e atrazina com tembotrione promoveram maior eficácia no controle de plantas daninhas. Apesar de ser classificado como um dos tratamentos com melhor eficácia, a associação entre glyphosate e atrazina, causou uma redução mais significativa na diversidade da comunidade vegetal, e práticas alternativas de manejo de plantas daninhas devem ser aplicadas aos campos de cultivo de milho para evitar a seleção de plantas daninhas. MenosABSTRACT - Studies evaluating the effectiveness of herbicides on weed control, coupled with the sustainability of the weed management system, are of great importance. The present study aims to evaluate the efficacy of post-emergence herbicides applied to maize while inferring the sustainability of the treatments employing an ecological approach. The experiment was installed in a randomized block design with four replications. The treatments consisted of the application of atrazine at the dose of 1500 g ha-1; atrazine + mesotrione at 1500 + 72 g ha-1; atrazine + tembotrione at 1500 + 100.8 g ha-1; atrazine + nicosulfuron at 1500 + 22.5 g ha-1; atrazine + glyphosate at 1500 g ha-1 + 792.5 g ha-1, in addition to weeded and infested control treatments. The herbicides were applied at the 4 leaf stage of maize. The phytotoxicity and control efficacy was assessed 7, 14, 21, and 28 days after applying treatments (DAT). In addition, a phytosociological survey of all plots was carried out in the last assessment. Herbicides did not cause phytotoxicity symptoms to the crop. However, associations of atrazine with glyphosate and atrazine with tembotrione promoted the greater effectiveness of weed control. Despite being classified as one of the treatments with better effectiveness, the association between glyphosate and atrazine, caused a more significant reduction in the diversity of the plant community, and alternative weed management practices should be applied to maize cropping fields ... Mostrar Tudo |
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Palavras-Chave: |
Dissimilaridade; Dissimilarity; Diversidade; Diversity; Planta daninha. |
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Thesagro: |
Controle Químico; Erva Daninha; Herbicida; Zea Mays. |
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Thesaurus NAL: |
Chemical control. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1144576/1/Control-efficacy-and-phytosociological-characterization-of-weeds.pdf
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Marc: |
LEADER 04058naa a2200301 a 4500
001 2144576
005 2022-07-11
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.18512/rbms2022v21e1240$2DOI
100 1 $aSILVA, A. F. da
245 $aControl efficacy and phytosociological characterization of weeds as a function of post-emergence herbicides applied to maize.$h[electronic resource]
260 $c2022
520 $aABSTRACT - Studies evaluating the effectiveness of herbicides on weed control, coupled with the sustainability of the weed management system, are of great importance. The present study aims to evaluate the efficacy of post-emergence herbicides applied to maize while inferring the sustainability of the treatments employing an ecological approach. The experiment was installed in a randomized block design with four replications. The treatments consisted of the application of atrazine at the dose of 1500 g ha-1; atrazine + mesotrione at 1500 + 72 g ha-1; atrazine + tembotrione at 1500 + 100.8 g ha-1; atrazine + nicosulfuron at 1500 + 22.5 g ha-1; atrazine + glyphosate at 1500 g ha-1 + 792.5 g ha-1, in addition to weeded and infested control treatments. The herbicides were applied at the 4 leaf stage of maize. The phytotoxicity and control efficacy was assessed 7, 14, 21, and 28 days after applying treatments (DAT). In addition, a phytosociological survey of all plots was carried out in the last assessment. Herbicides did not cause phytotoxicity symptoms to the crop. However, associations of atrazine with glyphosate and atrazine with tembotrione promoted the greater effectiveness of weed control. Despite being classified as one of the treatments with better effectiveness, the association between glyphosate and atrazine, caused a more significant reduction in the diversity of the plant community, and alternative weed management practices should be applied to maize cropping fields to avoid weed selection. RESUMO - Estudos avaliando a eficácia de herbicidas no controle de plantas daninhas, aliados à sustentabilidade do sistema de manejo de plantas daninhas, são de grande importância. O presente estudo tem como objetivo avaliar a eficácia de herbicidas pós-emergência aplicados ao milho e inferir a sustentabilidade dos tratamentos utilizando uma abordagem ecológica. O experimento foi instalado em delineamento de blocos casualizados com quatro repetições. Os tratamentos consistiram na aplicação de atrazina na dose de 1500 g ha-1; atrazina + mesotriona a 1500 + 72 g ha-1; atrazina + tembotriona a 1500 + 100,8 g ha-1; atrazina + nicossulfurão a 1500 + 22,5 g ha-1; atrazina + glifosato a 1500 g ha-1 + 792,5 g ha-1, além dos tratamentos de controle capinado e infestado. Os herbicidas foram aplicados no estádio de 4 folhas do milho. A fitotoxicidade e a eficácia do controle foram avaliadas 7, 14, 21 e 28 dias após a aplicação dos tratamentos (DAT). Além disso, na última avaliação foi realizado um levantamento fitossociológico de todas as parcelas. Os herbicidas não causaram sintomas de fitotoxicidade à cultura. No entanto, associações de atrazina com glyphosate e atrazina com tembotrione promoveram maior eficácia no controle de plantas daninhas. Apesar de ser classificado como um dos tratamentos com melhor eficácia, a associação entre glyphosate e atrazina, causou uma redução mais significativa na diversidade da comunidade vegetal, e práticas alternativas de manejo de plantas daninhas devem ser aplicadas aos campos de cultivo de milho para evitar a seleção de plantas daninhas.
650 $aChemical control
650 $aControle Químico
650 $aErva Daninha
650 $aHerbicida
650 $aZea Mays
653 $aDissimilaridade
653 $aDissimilarity
653 $aDiversidade
653 $aDiversity
653 $aPlanta daninha
700 1 $aPADRÃO, V. A.
700 1 $aCONCENÇO, G.
700 1 $aGALON, L.
700 1 $aASPIAZÚ, I.
773 $tRevista Brasileira de Milho e Sorgo$gv. 21, e1240, 2022.
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