| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Algodão; Embrapa Amazônia Oriental; Embrapa Trigo. |
|
Data corrente: |
18/11/1992 |
|
Data da última atualização: |
15/03/2006 |
|
Autoria: |
OLIVEIRA, J. F. L. de. |
|
Título: |
Influencia do tipo de arado sobre algumas caracteristicas fisicas do solo e na reincidencia de ervas daninhas. |
|
Ano de publicação: |
1975 |
|
Fonte/Imprenta: |
Santa Maria: UFSM, 1975. |
|
Páginas: |
70p. |
|
Idioma: |
Português |
|
Notas: |
Tese Mestrado. |
|
Conteúdo: |
O uso adequado de implementos agricolas em funcao das caracteristicas do solo a ser trabalhado apresenta serias limitacoes em virtude do reduzido numero de pesquisas que estudam as relacoes solo-implemntos. Com o objetivo de comparar os efeitos da aracao, atraves das alteracoes fisicas provocadas no solo e da reincidencia de ervas daninhas, trabalhou-se com arado de aivecas e arado de discos em tres velocidades diferentes em um solo Podzolico vermelho amarelo textura media relevo ondulado, substrato arenito pertencente a unidade de mapeamento Sao Pedro. Utilizou-se como tratamentos as combinacoes entre os dois tipos de arados e as velocidades de 3, 5 e 7km hora-1. Estes tratamentos foram aplicados em parcelas de 5X40m dispostas em delinea,emto experimena de blocos ao acaso com quatro repeticoes. Foram efetuadas apos a aracao, determinacoes de densidade do solo, porsosidae total, macroporosidae, microporosidae, rugosidade da superficie do solo, reindencia de ervas daninhas e a descricao do perfil de acao dos arados. Os resultados indicaram as alteracoes fisicas provocadas no solo pela aracao, nao dependeram do tipo de arado, men das velocidades de operacao. Entretanto o arado de aivecas mostrou-se mais eficiente na diminuicao da reincidencia de ervas daninhas, enquanto que o arado de discos provocou maior rugosidae na superficie do solo. Observou-se ainda que a melhora das condicoes fisicas no solo estudado, teve sua permanencia por tempo muito reduzido. |
|
Palavras-Chave: |
Aracao; Brasil; Controle; Daninhas; Disc plow; Ervas; Prepoara; Rio grande do Sul; Santa Maria; Solos. |
|
Thesagro: |
Arado; Arado de Aiveca; Arado de Disco; Equipamento; Mecanização Agrícola; Solo. |
|
Thesaurus Nal: |
equipment; soil. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02347nam a2200349 a 4500
001 1401597
005 2006-03-15
008 1975 bl uuuu m 00u1 u #d
100 1 $aOLIVEIRA, J. F. L. de
245 $aInfluencia do tipo de arado sobre algumas caracteristicas fisicas do solo e na reincidencia de ervas daninhas.
260 $aSanta Maria: UFSM$c1975
300 $a70p.
500 $aTese Mestrado.
520 $aO uso adequado de implementos agricolas em funcao das caracteristicas do solo a ser trabalhado apresenta serias limitacoes em virtude do reduzido numero de pesquisas que estudam as relacoes solo-implemntos. Com o objetivo de comparar os efeitos da aracao, atraves das alteracoes fisicas provocadas no solo e da reincidencia de ervas daninhas, trabalhou-se com arado de aivecas e arado de discos em tres velocidades diferentes em um solo Podzolico vermelho amarelo textura media relevo ondulado, substrato arenito pertencente a unidade de mapeamento Sao Pedro. Utilizou-se como tratamentos as combinacoes entre os dois tipos de arados e as velocidades de 3, 5 e 7km hora-1. Estes tratamentos foram aplicados em parcelas de 5X40m dispostas em delinea,emto experimena de blocos ao acaso com quatro repeticoes. Foram efetuadas apos a aracao, determinacoes de densidade do solo, porsosidae total, macroporosidae, microporosidae, rugosidade da superficie do solo, reindencia de ervas daninhas e a descricao do perfil de acao dos arados. Os resultados indicaram as alteracoes fisicas provocadas no solo pela aracao, nao dependeram do tipo de arado, men das velocidades de operacao. Entretanto o arado de aivecas mostrou-se mais eficiente na diminuicao da reincidencia de ervas daninhas, enquanto que o arado de discos provocou maior rugosidae na superficie do solo. Observou-se ainda que a melhora das condicoes fisicas no solo estudado, teve sua permanencia por tempo muito reduzido.
650 $aequipment
650 $asoil
650 $aArado
650 $aArado de Aiveca
650 $aArado de Disco
650 $aEquipamento
650 $aMecanização Agrícola
650 $aSolo
653 $aAracao
653 $aBrasil
653 $aControle
653 $aDaninhas
653 $aDisc plow
653 $aErvas
653 $aPrepoara
653 $aRio grande do Sul
653 $aSanta Maria
653 $aSolos
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Agrobiologia. |
|
Data corrente: |
30/06/2021 |
|
Data da última atualização: |
30/06/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 1 |
|
Autoria: |
SANTOS, C. M. dos; RIBEIRO, N. V. S.; SCHWAB, S.; BALDANI, J. I.; VIDAL, M. S. |
|
Afiliação: |
CARLOS M. DOS SANTOS, Bolsista da Embrapa Agrobiologia; NÁTHALIA V. S. RIBEIRO, Bolsista da Embrapa Agrobiologia; STEFAN SCHWAB, CNPAB; JOSE IVO BALDANI, CNPAB; MARCIA SOARES VIDAL, CNPAB. |
|
Título: |
The effect of inoculation of a diazotrophic bacterial xonsortium on the indigenous bacterial community structure of sugarcane apoplast fluid. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Current Microbiologym, Published online, 25 june 2021. |
|
ISSN: |
1432-0991 |
|
DOI: |
https://doi.org/10.1007/s00284-021-02571-0 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The extracellular space in plants, termed the apoplast, has a pH and sugar content that enables bacterial growth and represents a possible niche for the establishment of endophytic bacteria. Previous studies have investigated the effects of diazotrophic bacteria inoculation in sugarcane varieties, but it has not yet been analyzed how the microbial community of apoplast fluid of sugarcane is affected. High-throughput next generation sequencing of the 16S rRNA gene was used throughout this study to determine the effect of inoculation with a diazotrophic bacteria consortium, previously isolated from sugarcane, on the native bacterial population of sugarcane variety RB867515 grown in the field. The analyses were carried out 450 days after inoculation. The results revealed the presence of 22 phyla, with predominance of Proteobacteria phylum. It was observed that the inoculated consortium changed the indigenous bacterial community structure of sugarcane apoplast fluid by decreasing diversity and evenness, interfering in the composition of rare species. Microbial community composition analysis revealed differences between treatments. The differential abundance test showed there were 43 amplicon sequence variants (ASVs) which were relatively more abundant in the inoculated treatment, with predominance of the Sphingomonas genus. The pre-dicted functions of the most abundant ASVs revealed the presence of genera related to plant growth promotion and protection against phytopathogens. Analysis to evaluate the occurrence of inoculated strains in the recovered data was not conclusive since the ASVs taxonomically close to the inoculated bacteria were observed in low abundance. The present study is the first report to elucidate the bacterial community in sugarcane apoplast fluid using a culture-independent approach. It demonstrated that the diazotrophic bacterial consortium interferes in the natural bacterial community in sugarcane variety RB867515 MenosThe extracellular space in plants, termed the apoplast, has a pH and sugar content that enables bacterial growth and represents a possible niche for the establishment of endophytic bacteria. Previous studies have investigated the effects of diazotrophic bacteria inoculation in sugarcane varieties, but it has not yet been analyzed how the microbial community of apoplast fluid of sugarcane is affected. High-throughput next generation sequencing of the 16S rRNA gene was used throughout this study to determine the effect of inoculation with a diazotrophic bacteria consortium, previously isolated from sugarcane, on the native bacterial population of sugarcane variety RB867515 grown in the field. The analyses were carried out 450 days after inoculation. The results revealed the presence of 22 phyla, with predominance of Proteobacteria phylum. It was observed that the inoculated consortium changed the indigenous bacterial community structure of sugarcane apoplast fluid by decreasing diversity and evenness, interfering in the composition of rare species. Microbial community composition analysis revealed differences between treatments. The differential abundance test showed there were 43 amplicon sequence variants (ASVs) which were relatively more abundant in the inoculated treatment, with predominance of the Sphingomonas genus. The pre-dicted functions of the most abundant ASVs revealed the presence of genera related to plant growth promotion and protection against phytopathogens. A... Mostrar Tudo |
|
Palavras-Chave: |
Endophytic bacteria; Plant growth promotion bacteria. |
|
Categoria do assunto: |
S Ciências Biológicas |
|
Marc: |
LEADER 02707naa a2200217 a 4500
001 2132685
005 2021-06-30
008 2021 bl uuuu u00u1 u #d
022 $a1432-0991
024 7 $ahttps://doi.org/10.1007/s00284-021-02571-0$2DOI
100 1 $aSANTOS, C. M. dos
245 $aThe effect of inoculation of a diazotrophic bacterial xonsortium on the indigenous bacterial community structure of sugarcane apoplast fluid.$h[electronic resource]
260 $c2021
520 $aThe extracellular space in plants, termed the apoplast, has a pH and sugar content that enables bacterial growth and represents a possible niche for the establishment of endophytic bacteria. Previous studies have investigated the effects of diazotrophic bacteria inoculation in sugarcane varieties, but it has not yet been analyzed how the microbial community of apoplast fluid of sugarcane is affected. High-throughput next generation sequencing of the 16S rRNA gene was used throughout this study to determine the effect of inoculation with a diazotrophic bacteria consortium, previously isolated from sugarcane, on the native bacterial population of sugarcane variety RB867515 grown in the field. The analyses were carried out 450 days after inoculation. The results revealed the presence of 22 phyla, with predominance of Proteobacteria phylum. It was observed that the inoculated consortium changed the indigenous bacterial community structure of sugarcane apoplast fluid by decreasing diversity and evenness, interfering in the composition of rare species. Microbial community composition analysis revealed differences between treatments. The differential abundance test showed there were 43 amplicon sequence variants (ASVs) which were relatively more abundant in the inoculated treatment, with predominance of the Sphingomonas genus. The pre-dicted functions of the most abundant ASVs revealed the presence of genera related to plant growth promotion and protection against phytopathogens. Analysis to evaluate the occurrence of inoculated strains in the recovered data was not conclusive since the ASVs taxonomically close to the inoculated bacteria were observed in low abundance. The present study is the first report to elucidate the bacterial community in sugarcane apoplast fluid using a culture-independent approach. It demonstrated that the diazotrophic bacterial consortium interferes in the natural bacterial community in sugarcane variety RB867515
653 $aEndophytic bacteria
653 $aPlant growth promotion bacteria
700 1 $aRIBEIRO, N. V. S.
700 1 $aSCHWAB, S.
700 1 $aBALDANI, J. I.
700 1 $aVIDAL, M. S.
773 $tCurrent Microbiologym, Published online, 25 june 2021.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agrobiologia (CNPAB) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
