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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
08/06/2015 |
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Data da última atualização: |
09/06/2015 |
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Autoria: |
MENDES, L. M.; MENDES, S. A.; MENDES, R. F.; BUFALINO, L.; PROTÁSIO, T. de P. |
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Título: |
Umidade de equilíbrio de painéis osb de clones de Eucalyptus urophylla. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Cerne, Lavras, v. 20, n. 4, p. 519-528, 2014. |
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Idioma: |
Português |
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Conteúdo: |
Conduziu-se, este trabalho, com o objetivo de testar a eficiência da equação de Nelson na estimativa da umidade de equilíbrio desse tipo de material e propor um modelo para a determinação da umidade dos painéis em função da umidade relativa do ar, bem como avaliar os efeitos de algumas variáveis de processo na umidade de equilíbrio de painéis OSB (Oriented Strand Board). Amostras com dimensões de 25 x 25 mm foram colocadas em câmara de climatização, onde permaneceram a uma temperatura constante de 30ºC e tiveram suas massas determinadas, quando estabilizadas nos teores de umidade relativa do ar de 40, 50, 60, 70, 80 e 90%. Pelos resultados obtidos, pode-se concluir que: a equação de Nelson tem a tendência de subestimar os valores de umidade do painel; o modelo polinomial ajustado com base apenas na umidade relativa do ar apresentou grande potencial de utilização; não houve efeito das variáveis densidade do painel, densidade básica da madeira, tipo de colchão e temperatura de prensagem sobre os valores médios de umidade de equilíbrio na dessorção 1, adsorção e dessorção 2, apesar de comportamentos distintos terem sido observados para as isotermas dos tratamentos. |
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Palavras-Chave: |
Equação de Nelson; Painél de partícula orientada; Variável de produção. |
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Categoria do assunto: |
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Marc: |
LEADER 01745naa a2200157 a 4500
001 2017120
005 2015-06-09
008 2014 bl uuuu u00u1 u #d
100 1 $aMENDES, L. M.; MENDES, S. A.; MENDES, R. F.; BUFALINO, L.; PROTÁSIO, T. de P.
245 $aUmidade de equilíbrio de painéis osb de clones de Eucalyptus urophylla.
260 $c2014
520 $aConduziu-se, este trabalho, com o objetivo de testar a eficiência da equação de Nelson na estimativa da umidade de equilíbrio desse tipo de material e propor um modelo para a determinação da umidade dos painéis em função da umidade relativa do ar, bem como avaliar os efeitos de algumas variáveis de processo na umidade de equilíbrio de painéis OSB (Oriented Strand Board). Amostras com dimensões de 25 x 25 mm foram colocadas em câmara de climatização, onde permaneceram a uma temperatura constante de 30ºC e tiveram suas massas determinadas, quando estabilizadas nos teores de umidade relativa do ar de 40, 50, 60, 70, 80 e 90%. Pelos resultados obtidos, pode-se concluir que: a equação de Nelson tem a tendência de subestimar os valores de umidade do painel; o modelo polinomial ajustado com base apenas na umidade relativa do ar apresentou grande potencial de utilização; não houve efeito das variáveis densidade do painel, densidade básica da madeira, tipo de colchão e temperatura de prensagem sobre os valores médios de umidade de equilíbrio na dessorção 1, adsorção e dessorção 2, apesar de comportamentos distintos terem sido observados para as isotermas dos tratamentos.
653 $aEquação de Nelson
653 $aPainél de partícula orientada
653 $aVariável de produção
773 $tCerne, Lavras$gv. 20, n. 4, p. 519-528, 2014.
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Registro original: |
Embrapa Florestas (CNPF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
16/11/2020 |
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Data da última atualização: |
08/01/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 5 |
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Autoria: |
OSEI, O.; ABAIDOO, R. C.; OPOKU, A.; ROUWS, J. R. C.; BODDEY, R. M.; AHIABOR, B. D. K.; ROUWS, L. F. M. |
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Afiliação: |
Ophelia Osei, CSIR-Soil Research Institute, Kumasi, Ghana; Robert C. Abaidoo, Nkrumah University of Science and Technology, Kumasi, Ghana; Andrews Opoku, Nkrumah University of Science and Technology, Kumasi, Ghana; JANAINA RIBEIRO COSTA ROUWS, CNPAB; ROBERT MICHAEL BODDEY, CNPAB; Benjamin D. K. Ahiabor, SIR-Savannah Agricultural Research Institute, Tamale, Ghana; LUC FELICIANUS MARIE ROUWS, CNPAB. |
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Título: |
Native Bradyrhizobium strains from Ghana can enhance grain Yyields of field-grown cowpea and groundnut. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Frontiers in Agronomy, 16 April 2020 |
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Idioma: |
Inglês |
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Conteúdo: |
The existence of large population of ineffective native rhizobia and inconsistent performance of exotic strains in Ghanaian soils necessitate the need to identify effective and locally adapted elite strains for enhanced legume-rhizobium symbiosis. This study was designed to test the suitability of two previously selected potential elite Bradyrhizobium strains for use as inoculants on cowpea (Vigna unguiculata L. Walp) and groundnut (Arachis hypogaea L.) in multilocation experiments. Field experiments were set up at 26 locations (12 planted with cowpea and 14 planted with groundnut) in the Northern region of Ghana. Four treatments were applied at each location: inoculation with Bradyrhizobium strains KNUST 1002 and KNUST 1006, a positive nitrogen (+N) control and a negative control (without nitrogen or inoculation) arranged in randomized complete blocks with four replications. The results showed that inoculation with strains KNUST 1002 and KNUST 1006 promoted significant increases in grain yields of both cowpea and groundnut. On average, inoculating cowpea with strains KNUST 1002 and KNUST 1006 resulted in 63 and 52% increases in grain yield when compared to the negative control. Pod yields of groundnut, on the other hand, were significantly (p < 0.05) increased at 57% of the study locations with one or both test strains. Responses to inoculation were, however, highly variable across the different study locations (i.e., significant Treatment × Location Interaction, TLI). A detailed analysis of this significant TLI based on the genotype main effect (G) plus genotype-by-environment (GE) interaction (GGE) biplot analysis revealed that location contributed 71 and 88% of the variation observed in cowpea and groundnut, respectively, and grouped the locations into mega-environments for cowpea. These results demonstrate that native elite Bradyrhizobium strains KNUST 1002 and KNUST 1006 have potential for use as inoculants to increase cowpea and groundnut production in Northern Ghana. MenosThe existence of large population of ineffective native rhizobia and inconsistent performance of exotic strains in Ghanaian soils necessitate the need to identify effective and locally adapted elite strains for enhanced legume-rhizobium symbiosis. This study was designed to test the suitability of two previously selected potential elite Bradyrhizobium strains for use as inoculants on cowpea (Vigna unguiculata L. Walp) and groundnut (Arachis hypogaea L.) in multilocation experiments. Field experiments were set up at 26 locations (12 planted with cowpea and 14 planted with groundnut) in the Northern region of Ghana. Four treatments were applied at each location: inoculation with Bradyrhizobium strains KNUST 1002 and KNUST 1006, a positive nitrogen (+N) control and a negative control (without nitrogen or inoculation) arranged in randomized complete blocks with four replications. The results showed that inoculation with strains KNUST 1002 and KNUST 1006 promoted significant increases in grain yields of both cowpea and groundnut. On average, inoculating cowpea with strains KNUST 1002 and KNUST 1006 resulted in 63 and 52% increases in grain yield when compared to the negative control. Pod yields of groundnut, on the other hand, were significantly (p < 0.05) increased at 57% of the study locations with one or both test strains. Responses to inoculation were, however, highly variable across the different study locations (i.e., significant Treatment × Location Interaction, TLI). A de... Mostrar Tudo |
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Palavras-Chave: |
Bradyrhizobium strains; FBN. |
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Thesagro: |
Vigna Unguiculata. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
LEADER 02671naa a2200229 a 4500
001 2126642
005 2021-01-08
008 2020 bl uuuu u00u1 u #d
100 1 $aOSEI, O.
245 $aNative Bradyrhizobium strains from Ghana can enhance grain Yyields of field-grown cowpea and groundnut.$h[electronic resource]
260 $c2020
520 $aThe existence of large population of ineffective native rhizobia and inconsistent performance of exotic strains in Ghanaian soils necessitate the need to identify effective and locally adapted elite strains for enhanced legume-rhizobium symbiosis. This study was designed to test the suitability of two previously selected potential elite Bradyrhizobium strains for use as inoculants on cowpea (Vigna unguiculata L. Walp) and groundnut (Arachis hypogaea L.) in multilocation experiments. Field experiments were set up at 26 locations (12 planted with cowpea and 14 planted with groundnut) in the Northern region of Ghana. Four treatments were applied at each location: inoculation with Bradyrhizobium strains KNUST 1002 and KNUST 1006, a positive nitrogen (+N) control and a negative control (without nitrogen or inoculation) arranged in randomized complete blocks with four replications. The results showed that inoculation with strains KNUST 1002 and KNUST 1006 promoted significant increases in grain yields of both cowpea and groundnut. On average, inoculating cowpea with strains KNUST 1002 and KNUST 1006 resulted in 63 and 52% increases in grain yield when compared to the negative control. Pod yields of groundnut, on the other hand, were significantly (p < 0.05) increased at 57% of the study locations with one or both test strains. Responses to inoculation were, however, highly variable across the different study locations (i.e., significant Treatment × Location Interaction, TLI). A detailed analysis of this significant TLI based on the genotype main effect (G) plus genotype-by-environment (GE) interaction (GGE) biplot analysis revealed that location contributed 71 and 88% of the variation observed in cowpea and groundnut, respectively, and grouped the locations into mega-environments for cowpea. These results demonstrate that native elite Bradyrhizobium strains KNUST 1002 and KNUST 1006 have potential for use as inoculants to increase cowpea and groundnut production in Northern Ghana.
650 $aVigna Unguiculata
653 $aBradyrhizobium strains
653 $aFBN
700 1 $aABAIDOO, R. C.
700 1 $aOPOKU, A.
700 1 $aROUWS, J. R. C.
700 1 $aBODDEY, R. M.
700 1 $aAHIABOR, B. D. K.
700 1 $aROUWS, L. F. M.
773 $tFrontiers in Agronomy, 16 April 2020
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