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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
08/11/2001 |
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Data da última atualização: |
31/05/2007 |
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Autoria: |
BODDEY, R. M.; POLIDORO, J. C.; RESENDE, A. S.; ALVES, B. J. R.; URQUIAGA, S. |
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Título: |
Use of the 15N natural abundance technique for the quantification of the contribution of N2 fixation to sugar cane other grasses. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Australian Journal of Plant Physiology, Victoria, v. 28, p. 889-895, 2001. |
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Idioma: |
Inglês |
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Conteúdo: |
The use of the 15N natural abundance technique to quantify contribution of biological nitrogen fixation (BNF) to any plant is based on the observation that N derived from soil is generally slightly different [usually higher in 15N abundance (15N%)] than that of the air. Plants or micro-organisms growing solely on BNF generally accumulate N with 15N isotopic abundance lower than that of the air (i.e. 15N% is negative), while plants obtaining all N from the soil generally show a positive 15N% signal. The technique is applied by estimating the 15N abundance of the putative 'N2-fixing' crop and analysing the 15N abundance of neighbouring non-N2-fixing reference plants. However, often there are such large variations in the N derived from the soil by different non-N2-fixing plants that in natural ecosystems it is often impossible to even distinguish plants that are benefiting form BNF, let alone quantity this contribution. The reasons why soil derived N can vary so widely, especially in natural ecosystems, are briefly discussed and a sampling strategy is described to assess possible BNF inputs to sugar can plants in commercial plantations in Brazil. The results suggest that in nine of the 11 sites studied, BNF inputs were significant ranging from 25 to 60% of N assimilated. |
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Palavras-Chave: |
BNF; FBN; Fixação Biológica de nitrogênio; N; Sugar cane. |
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Thesagro: |
Cana de Açúcar; Gramínea; Nitrogênio; Solo. |
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Thesaurus NAL: |
grasses; nitrogen; nitrogen fixation; soil. |
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Categoria do assunto: |
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Marc: |
LEADER 02188naa a2200325 a 4500
001 1621281
005 2007-05-31
008 2001 bl --- 0-- u #d
100 1 $aBODDEY, R. M.
245 $aUse of the 15N natural abundance technique for the quantification of the contribution of N2 fixation to sugar cane other grasses.
260 $c2001
520 $aThe use of the 15N natural abundance technique to quantify contribution of biological nitrogen fixation (BNF) to any plant is based on the observation that N derived from soil is generally slightly different [usually higher in 15N abundance (15N%)] than that of the air. Plants or micro-organisms growing solely on BNF generally accumulate N with 15N isotopic abundance lower than that of the air (i.e. 15N% is negative), while plants obtaining all N from the soil generally show a positive 15N% signal. The technique is applied by estimating the 15N abundance of the putative 'N2-fixing' crop and analysing the 15N abundance of neighbouring non-N2-fixing reference plants. However, often there are such large variations in the N derived from the soil by different non-N2-fixing plants that in natural ecosystems it is often impossible to even distinguish plants that are benefiting form BNF, let alone quantity this contribution. The reasons why soil derived N can vary so widely, especially in natural ecosystems, are briefly discussed and a sampling strategy is described to assess possible BNF inputs to sugar can plants in commercial plantations in Brazil. The results suggest that in nine of the 11 sites studied, BNF inputs were significant ranging from 25 to 60% of N assimilated.
650 $agrasses
650 $anitrogen
650 $anitrogen fixation
650 $asoil
650 $aCana de Açúcar
650 $aGramínea
650 $aNitrogênio
650 $aSolo
653 $aBNF
653 $aFBN
653 $aFixação Biológica de nitrogênio
653 $aN
653 $aSugar cane
700 1 $aPOLIDORO, J. C.
700 1 $aRESENDE, A. S.
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
773 $tAustralian Journal of Plant Physiology, Victoria$gv. 28, p. 889-895, 2001.
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Embrapa Agrobiologia (CNPAB) |
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