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Registro Completo |
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Biblioteca(s): |
Embrapa Roraima. |
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Data corrente: |
27/05/2021 |
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Data da última atualização: |
18/06/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MELO, A. K. P.; ALBUQUERQUE, J. A. A.; SIQUEIRA, R. H. S.; SILVA, E. E. da; MEDEIROS, R. D. de; SOUZA, K. T. S.; SOUZA, L. T.; GONÇALVES, A. C. M.; SOARES, M. B. B. |
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Afiliação: |
EDMILSON EVANGELISTA DA SILVA, CPAF-RR; ROBERTO DANTAS DE MEDEIROS, CPAF-RR. |
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Título: |
Occurrence of noxious weeds under different soil management systems. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Applied Ecology and Environmental Research, v. 19, n. 3, p. 2061-2072, 2021. |
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Idioma: |
Inglês |
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Conteúdo: |
The aim of this work was to identify weed species in areas under different soil management systems. The research was carried out in the Brazilian Agricultural Research Corporation experimental area, in the 2017/2018 harvest, in the city of Boa Vista, Roraima State, Brazil. The experimental design was randomized blocks and the treatments included of five soil management systems (native vegetation, minimum tillage, no-tillage, conventional tillage and conventional tillage with crop rotation). Weed collection, identification, counting and drying were performed and then the phytosociological indices (Relative density, relative frequency, relative abundance, importance value index, relative importance value index and dry mass) were calculated. Variance analysis with means compared by Tukey test (P <0.05), group analysis by hierarchical and non-hierarchical method, and principal component analysis were performed. Correlation coefficients of the variables were estimated. No and minimum tillage systems had the lowest weed rates per square meter. The botanical families Poaceae, Fabaceae and Rubiaceae are the most representative in the studied systems. Concerning relative frequency, the species Cyperus flavus stood out in all treatments other than native vegetation. |
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Palavras-Chave: |
Cover plant; Native vegetati; Phytosociological parameters; Spontaneous plants. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/223505/1/MELO-et-.-2021.pdf
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Marc: |
LEADER 02081naa a2200265 a 4500
001 2132072
005 2021-06-18
008 2021 bl uuuu u00u1 u #d
100 1 $aMELO, A. K. P.
245 $aOccurrence of noxious weeds under different soil management systems.$h[electronic resource]
260 $c2021
520 $aThe aim of this work was to identify weed species in areas under different soil management systems. The research was carried out in the Brazilian Agricultural Research Corporation experimental area, in the 2017/2018 harvest, in the city of Boa Vista, Roraima State, Brazil. The experimental design was randomized blocks and the treatments included of five soil management systems (native vegetation, minimum tillage, no-tillage, conventional tillage and conventional tillage with crop rotation). Weed collection, identification, counting and drying were performed and then the phytosociological indices (Relative density, relative frequency, relative abundance, importance value index, relative importance value index and dry mass) were calculated. Variance analysis with means compared by Tukey test (P <0.05), group analysis by hierarchical and non-hierarchical method, and principal component analysis were performed. Correlation coefficients of the variables were estimated. No and minimum tillage systems had the lowest weed rates per square meter. The botanical families Poaceae, Fabaceae and Rubiaceae are the most representative in the studied systems. Concerning relative frequency, the species Cyperus flavus stood out in all treatments other than native vegetation.
653 $aCover plant
653 $aNative vegetati
653 $aPhytosociological parameters
653 $aSpontaneous plants
700 1 $aALBUQUERQUE, J. A. A.
700 1 $aSIQUEIRA, R. H. S.
700 1 $aSILVA, E. E. da
700 1 $aMEDEIROS, R. D. de
700 1 $aSOUZA, K. T. S.
700 1 $aSOUZA, L. T.
700 1 $aGONÇALVES, A. C. M.
700 1 $aSOARES, M. B. B.
773 $tApplied Ecology and Environmental Research$gv. 19, n. 3, p. 2061-2072, 2021.
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Registro original: |
Embrapa Roraima (CPAF-RR) |
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Registro |
Volume |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
19/02/2016 |
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Data da última atualização: |
26/06/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
GERN, J. C.; SANTOS, L. F. dos; HABU, S.; NOSEDA, M. D.; LIMA, L. F. O. de; SILVA, A. L. L. da; SOCCOL, V. T.; BRANDAO, H. de M.; SOCCOL, C. R. |
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Afiliação: |
JULIANA CARINE GERN, CNPGL; LEANDRO FREIRE dos SANTOS, Universidade Federal do Paraná; SASCHA HABU, Universidade Federal do Paraná; USP; MIGUEL DANIEL NOSEDA, Universidade Federal do Paraná; LUCIANNA FREITAS OLIVEIRA de LIMA, Universidade Federal do Paraná; ANDRÉ LUÍS LOPES da SILVA, Universidade Federal do Paraná; VANETE THOMAZ SOCCOL, Universidade Federal do Paraná; HUMBERTO DE MELLO BRANDAO, CNPGL; CARLOS RICARDO SOCCOL, Universidade Federal do Paraná. |
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Título: |
Exopolysaccharide from Agaricus brasiliensis LPB and its Scale Up Studies in a Stirred Tank Fermenter. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Romanian Biotechnological Letters, v. 20, n. 6, p. 10945-10950, 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
Background and purpose: Although the activities of polysaccharides such as beta-glucans are well known in Agaricus brasiliensis, there has been little research on their exopolysaccharides and its characterization or scale up studies. The aim of the study was to study the monosaccharide composition of the exopolysaccharide (EPS) produced by Agaricus brasiliensis LPB3 and its production in a stirred tank fermenter. Materials and methods: Agaricus brasiliensis LPB3 was cultured in submerged fermentation in a medium containing glucose, yeast extract, K2HPO4 and MgSO4. Extracellular polysaccharide was precipitated with four volumes of 95% ethanol. For monosaccharide composition, the EPSs were hydrolyzed, derivatized to alditol acetates, and analyzed by gas chromatography (GC) and GC-mass spectrometry (GC-MS). Results and conclusions: The exopolysaccharide produced by Agaricus brasiliensis was predominantly composed by mannose (57,7%) and galactose (28,2%) residues. The studies in a stirred tank fermenter kept the productivity obtained in laboratory scale regarding the production of exopolysaccharides (≈ 1200 mg/L). This result can be considered promising since scale up approach can decrease its yield. |
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Palavras-Chave: |
Agaricus brasiliensis; Basidiomycete; Exopolysaccharide; Monosaccharide composition; Scale up; Stirred tank fermenter. |
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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/item/139533/1/Cnpgl-2015-RomBioLet-Exopolysaccharide.pdf
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Marc: |
LEADER 02098naa a2200289 a 4500
001 2037830
005 2023-06-26
008 2015 bl uuuu u00u1 u #d
100 1 $aGERN, J. C.
245 $aExopolysaccharide from Agaricus brasiliensis LPB and its Scale Up Studies in a Stirred Tank Fermenter.$h[electronic resource]
260 $c2015
520 $aBackground and purpose: Although the activities of polysaccharides such as beta-glucans are well known in Agaricus brasiliensis, there has been little research on their exopolysaccharides and its characterization or scale up studies. The aim of the study was to study the monosaccharide composition of the exopolysaccharide (EPS) produced by Agaricus brasiliensis LPB3 and its production in a stirred tank fermenter. Materials and methods: Agaricus brasiliensis LPB3 was cultured in submerged fermentation in a medium containing glucose, yeast extract, K2HPO4 and MgSO4. Extracellular polysaccharide was precipitated with four volumes of 95% ethanol. For monosaccharide composition, the EPSs were hydrolyzed, derivatized to alditol acetates, and analyzed by gas chromatography (GC) and GC-mass spectrometry (GC-MS). Results and conclusions: The exopolysaccharide produced by Agaricus brasiliensis was predominantly composed by mannose (57,7%) and galactose (28,2%) residues. The studies in a stirred tank fermenter kept the productivity obtained in laboratory scale regarding the production of exopolysaccharides (≈ 1200 mg/L). This result can be considered promising since scale up approach can decrease its yield.
653 $aAgaricus brasiliensis
653 $aBasidiomycete
653 $aExopolysaccharide
653 $aMonosaccharide composition
653 $aScale up
653 $aStirred tank fermenter
700 1 $aSANTOS, L. F. dos
700 1 $aHABU, S.
700 1 $aNOSEDA, M. D.
700 1 $aLIMA, L. F. O. de
700 1 $aSILVA, A. L. L. da
700 1 $aSOCCOL, V. T.
700 1 $aBRANDAO, H. de M.
700 1 $aSOCCOL, C. R.
773 $tRomanian Biotechnological Letters$gv. 20, n. 6, p. 10945-10950, 2015.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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