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Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
17/09/1996 |
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Data da última atualização: |
17/09/1996 |
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Autoria: |
DOBEREINER, J.; URQUIAGA, S.; BODDEY, R. M. |
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Título: |
Alternatives for nitrogen nutrition of crops in tropical agriculture. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Fertilizer Research, Dordrecht, v. 42, p. 339-346, 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
The development of sustainable agricultural systems for the tropics requires among other technologies, alternatives for nitrogen fertilizers which are often limited in availability for financial reasons and also represent a major source of groundwater and air pollution. There are many new alternatives for the development of agricultural systems which make use of biological processes in soil. Biological nitrogen fixation (BNF), that is, the biological conversion of atmospheric dinitrogen into mineral N, is the most important alternative among them. Examples are given of the impact of various technologies used in Brazil. Soybean, introduced into the country 30 years ago, is now the second most important export crop, reaching 24 million tons annually with no N fertilizer application. Consequently, Brazil today is the country in the country in the world which uses the lowest amounts of nitrogen fertilizers in relation to phosphate. Alternatives for crop rotations and pastures are also discussed. Possibilities of expanding BNF to cereals and other non-legume crops are gaining new credibility due to the identification of endophytic associations with diazotrophic bacteria. The definite proof of substantial BNF in sugar cane with N balance and 15N methods in certain genotypes selected under low N fertilizer applications opens up new alternatives for sustainable agriculture and will be the key to viable bio-fuel programmes. |
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Palavras-Chave: |
Biofuel; BNF; FBN; Fixação biologica de nitrogênio; Production. |
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Thesagro: |
Adubação Verde; Biocombustível; Matéria Orgânica; Produção; Soja; Solo. |
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Thesaurus NAL: |
green manures; nitrogen fixation; organic matter; soybeans. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02278naa a2200325 a 4500
001 1620881
005 1996-09-17
008 1995 bl --- 0-- u #d
100 1 $aDOBEREINER, J.
245 $aAlternatives for nitrogen nutrition of crops in tropical agriculture.
260 $c1995
520 $aThe development of sustainable agricultural systems for the tropics requires among other technologies, alternatives for nitrogen fertilizers which are often limited in availability for financial reasons and also represent a major source of groundwater and air pollution. There are many new alternatives for the development of agricultural systems which make use of biological processes in soil. Biological nitrogen fixation (BNF), that is, the biological conversion of atmospheric dinitrogen into mineral N, is the most important alternative among them. Examples are given of the impact of various technologies used in Brazil. Soybean, introduced into the country 30 years ago, is now the second most important export crop, reaching 24 million tons annually with no N fertilizer application. Consequently, Brazil today is the country in the country in the world which uses the lowest amounts of nitrogen fertilizers in relation to phosphate. Alternatives for crop rotations and pastures are also discussed. Possibilities of expanding BNF to cereals and other non-legume crops are gaining new credibility due to the identification of endophytic associations with diazotrophic bacteria. The definite proof of substantial BNF in sugar cane with N balance and 15N methods in certain genotypes selected under low N fertilizer applications opens up new alternatives for sustainable agriculture and will be the key to viable bio-fuel programmes.
650 $agreen manures
650 $anitrogen fixation
650 $aorganic matter
650 $asoybeans
650 $aAdubação Verde
650 $aBiocombustível
650 $aMatéria Orgânica
650 $aProdução
650 $aSoja
650 $aSolo
653 $aBiofuel
653 $aBNF
653 $aFBN
653 $aFixação biologica de nitrogênio
653 $aProduction
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tFertilizer Research, Dordrecht$gv. 42, p. 339-346, 1995.
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