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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
24/05/2004 |
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Data da última atualização: |
24/05/2004 |
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Autoria: |
MARTINS, L. M. V.; XAVIER, G. R.; RANGEL, F. W.; RIBEIRO, J. R. A.; NEVES, M. C. P.; MORGADO, L. B.; RUMJANEK, N. G. |
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Título: |
Contribution of biological nitrogen fixation to cowpea: a strategy for improving grain yield in the semi-arid region of Brazil. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Biology and Fertility of Soils, Berlin, v. 38, p. 333-339, 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
Nodulating bacteria from the family Rhizobiaceae are common in the semi-arid tropics around the world. The Brazilian semi-arid region extends over 95 million hectares of which only 3% is suitable for irrigation, therefore leaving an immense dryland area to be exploited by peasant farmers, who often lack appropriate technologies for sustainable management. Cowpea is an important crop in this area, representing the staple protein source for human nutrition. This work aimed to identify rhizobial strains capable of guaranteeing efficient nitrogen derived from biological fixation for cowpea cultivated in dryland areas, evaluating not just efficiency but also the ecological parameters of competitiveness and survival in the soil. Grain yield and nodulation parameters showed that strain BR 3267 is capable of establishing efficient nodulation, improving both yield and total N accumulated in grain. Cowpea inoculated with strain BR 3267 showed grain productivity similar to plants receiving 50 kg of N per hectare, which is the amount of fertilizer commonly used in the north-east region. These characteristics associated with previously determined ecological properties makes strain BR 3267 an important resource for the optimization of biological nitrogen fixation in cowpea in the dryland areas of the semi-arid tropics. Data on the dynamics of rhizobial populations in such areas have shown that (1) the naturalized rhizobium population is very small and, by themselves, do not promote proper nodulation and, (2) the inoculant rhizobia do not persist between crops. Such characteristics represent an opportunity for the introduction of superior rhizobia strains, such as BR 3267, during the cowpea crop. MenosNodulating bacteria from the family Rhizobiaceae are common in the semi-arid tropics around the world. The Brazilian semi-arid region extends over 95 million hectares of which only 3% is suitable for irrigation, therefore leaving an immense dryland area to be exploited by peasant farmers, who often lack appropriate technologies for sustainable management. Cowpea is an important crop in this area, representing the staple protein source for human nutrition. This work aimed to identify rhizobial strains capable of guaranteeing efficient nitrogen derived from biological fixation for cowpea cultivated in dryland areas, evaluating not just efficiency but also the ecological parameters of competitiveness and survival in the soil. Grain yield and nodulation parameters showed that strain BR 3267 is capable of establishing efficient nodulation, improving both yield and total N accumulated in grain. Cowpea inoculated with strain BR 3267 showed grain productivity similar to plants receiving 50 kg of N per hectare, which is the amount of fertilizer commonly used in the north-east region. These characteristics associated with previously determined ecological properties makes strain BR 3267 an important resource for the optimization of biological nitrogen fixation in cowpea in the dryland areas of the semi-arid tropics. Data on the dynamics of rhizobial populations in such areas have shown that (1) the naturalized rhizobium population is very small and, by themselves, do not promote proper... Mostrar Tudo |
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Palavras-Chave: |
Biological nitrogen fixation; BNF; Caupi; FBN; Fixação biológica de nitrogênio; Survival. |
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Thesagro: |
Feijão de Corda; Rhizobium; Sobrevivência. |
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Thesaurus Nal: |
cowpeas. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02616naa a2200313 a 4500
001 1625826
005 2004-05-24
008 2003 bl --- 0-- u #d
100 1 $aMARTINS, L. M. V.
245 $aContribution of biological nitrogen fixation to cowpea$ba strategy for improving grain yield in the semi-arid region of Brazil.
260 $c2003
520 $aNodulating bacteria from the family Rhizobiaceae are common in the semi-arid tropics around the world. The Brazilian semi-arid region extends over 95 million hectares of which only 3% is suitable for irrigation, therefore leaving an immense dryland area to be exploited by peasant farmers, who often lack appropriate technologies for sustainable management. Cowpea is an important crop in this area, representing the staple protein source for human nutrition. This work aimed to identify rhizobial strains capable of guaranteeing efficient nitrogen derived from biological fixation for cowpea cultivated in dryland areas, evaluating not just efficiency but also the ecological parameters of competitiveness and survival in the soil. Grain yield and nodulation parameters showed that strain BR 3267 is capable of establishing efficient nodulation, improving both yield and total N accumulated in grain. Cowpea inoculated with strain BR 3267 showed grain productivity similar to plants receiving 50 kg of N per hectare, which is the amount of fertilizer commonly used in the north-east region. These characteristics associated with previously determined ecological properties makes strain BR 3267 an important resource for the optimization of biological nitrogen fixation in cowpea in the dryland areas of the semi-arid tropics. Data on the dynamics of rhizobial populations in such areas have shown that (1) the naturalized rhizobium population is very small and, by themselves, do not promote proper nodulation and, (2) the inoculant rhizobia do not persist between crops. Such characteristics represent an opportunity for the introduction of superior rhizobia strains, such as BR 3267, during the cowpea crop.
650 $acowpeas
650 $aFeijão de Corda
650 $aRhizobium
650 $aSobrevivência
653 $aBiological nitrogen fixation
653 $aBNF
653 $aCaupi
653 $aFBN
653 $aFixação biológica de nitrogênio
653 $aSurvival
700 1 $aXAVIER, G. R.
700 1 $aRANGEL, F. W.
700 1 $aRIBEIRO, J. R. A.
700 1 $aNEVES, M. C. P.
700 1 $aMORGADO, L. B.
700 1 $aRUMJANEK, N. G.
773 $tBiology and Fertility of Soils, Berlin$gv. 38, p. 333-339, 2003.
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Embrapa Agrobiologia (CNPAB) |
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