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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
27/06/2005 |
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Data da última atualização: |
27/06/2005 |
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Autoria: |
SALOMÃO, L. C. C.; PUSCHMANN, R.; SIQUEIRA, D. L. de; NOLASCO, C. de A. |
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Afiliação: |
Universidade Federal de Viçosa. |
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Título: |
Acúmulo e distribuição de nutrientes em banana 'Mysore' em desenvolvimento. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Revista Brasileira de Fruticultura, Jaboticabal, v.26, n.2, p.290-294, 2004. |
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ISSN: |
0100-2945 |
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Idioma: |
Português |
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Conteúdo: |
Foram determinados o acúmulo de matérias fresca e seca e dos nutrientes N, P, K, Ca, Mg, Zn, Fe e Mn em bananas 'Mysore', desde a antese floral da primeira penca feminina até o completo amadurecimento. O desenvolvimento dos frutos foi lento até o 42º dia após a antese, acelerando-se posteriormente. A fase de acúmulo máximo de minerais coincidiu com a de acúmulo máximo de matéria fresca, ou seja, 112 dias após a antese. A ordem de exportação de macronutrientes pelos frutos, em seu estádio de máximo acúmulo de matéria fresca, expressa em kgt-¹ de fruto fresco, foi 3,61 para K; 0,98 para N; 0,27 para Mg; 0,19 para P e 0,12 para Ca. Quanto aos micronutrientes, a ordem de exportação, expressa em gt-¹ de fruto fresco, foi 7,92 para Mn; 5,99 para Fe e 2,92 para Zn. Em frutos plenamente desenvolvidod, à exceção de Ca, Mn e Zn, todos os nutrientes acumularam-se mais na polpa do que na casca. |
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Palavras-Chave: |
macronutrientes; micronutrientes; Musa spp. |
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Thesagro: |
Casca; Polpa. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01562naa a2200229 a 4500
001 1652506
005 2005-06-27
008 2004 bl uuuu u00u1 u #d
022 $a0100-2945
100 1 $aSALOMÃO, L. C. C.
245 $aAcúmulo e distribuição de nutrientes em banana 'Mysore' em desenvolvimento.
260 $c2004
520 $aForam determinados o acúmulo de matérias fresca e seca e dos nutrientes N, P, K, Ca, Mg, Zn, Fe e Mn em bananas 'Mysore', desde a antese floral da primeira penca feminina até o completo amadurecimento. O desenvolvimento dos frutos foi lento até o 42º dia após a antese, acelerando-se posteriormente. A fase de acúmulo máximo de minerais coincidiu com a de acúmulo máximo de matéria fresca, ou seja, 112 dias após a antese. A ordem de exportação de macronutrientes pelos frutos, em seu estádio de máximo acúmulo de matéria fresca, expressa em kgt-¹ de fruto fresco, foi 3,61 para K; 0,98 para N; 0,27 para Mg; 0,19 para P e 0,12 para Ca. Quanto aos micronutrientes, a ordem de exportação, expressa em gt-¹ de fruto fresco, foi 7,92 para Mn; 5,99 para Fe e 2,92 para Zn. Em frutos plenamente desenvolvidod, à exceção de Ca, Mn e Zn, todos os nutrientes acumularam-se mais na polpa do que na casca.
650 $aCasca
650 $aPolpa
653 $amacronutrientes
653 $amicronutrientes
653 $aMusa spp
700 1 $aPUSCHMANN, R.
700 1 $aSIQUEIRA, D. L. de
700 1 $aNOLASCO, C. de A.
773 $tRevista Brasileira de Fruticultura, Jaboticabal$gv.26, n.2, p.290-294, 2004.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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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: |
29/12/1999 |
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Data da última atualização: |
31/05/2007 |
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Autoria: |
CANTARUTTI, R. B.; TARRE, R.; MACEDO, R.; CADISCH, G.; REZENDE, C. de P.; PEREIRA, J. M.; BRAGA, J. M.; GOMIDE, J. A.; FERREIRA, E.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
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Título: |
The effect of grazing intensity and the presence of a forage legume on nitrogen dynamics in Brachiaria pastures in the Atlantic forest region of the South of Bahia, Brazil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Nutrient Cycling in Agroecossytems, Netherlands, v. 64, p. 257-271, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
It has been shown that with careful grazing management and addition of p and K. but not N. fertilisers Brachiaria pastures are able to maintain sustainable live weight gains over many years. However. standard on-farm practice. which generally involves high stocking rates. leads after a few years to pasture decline due mainly to N deficiency for grass regrowth. To generate an understanding of the mechanism of pasture decline and possible management options to mitigate this process. a study was performed in the Atlantic forest region of the south of Bahia state to study the N dynamics in pastures of Brachiaria humidicola subject to three different stocking rates of beef cattle. with and without the presence of the forage legume Desmodium ovalifolium. Despite the fact that the C:N ratio of the deposited litter was high (60 to 70) the rate of decomposition was very rapid (k --0.07 9 g-l day-1) and annual rates of N turnover through the litter pathway were between 105 and 170 kg N ha-1 year-1. In the grass-only pastures as stocking rate increased from 2 to 3 head ha -1. N recycled in the litter decreased by 11 %. but a further increase to 4 head ha-1 decreased N recycling by 30% suggesting that beyond a certain critical level higher grazing stocking rates would lead to pasture decline if there was no N addition. High stocking rates decreased the proportion of the legume in the sward. but at all rates the concentration of N in both the green and dead grass in the forage on offer and in the litter was higher in the mixed sward. The presence of the legume caused a decrease in the C:N ratio of the microbial biomass while both soil N minera1isation and nitrification increased. This increased rate of turnover of the microbia1 biomass and the contribution of N2 fixation to the legume resulted in large increases in the N recycled via litter deposition ranging from 42 to 155 kg N ha-1 year-1. MenosIt has been shown that with careful grazing management and addition of p and K. but not N. fertilisers Brachiaria pastures are able to maintain sustainable live weight gains over many years. However. standard on-farm practice. which generally involves high stocking rates. leads after a few years to pasture decline due mainly to N deficiency for grass regrowth. To generate an understanding of the mechanism of pasture decline and possible management options to mitigate this process. a study was performed in the Atlantic forest region of the south of Bahia state to study the N dynamics in pastures of Brachiaria humidicola subject to three different stocking rates of beef cattle. with and without the presence of the forage legume Desmodium ovalifolium. Despite the fact that the C:N ratio of the deposited litter was high (60 to 70) the rate of decomposition was very rapid (k --0.07 9 g-l day-1) and annual rates of N turnover through the litter pathway were between 105 and 170 kg N ha-1 year-1. In the grass-only pastures as stocking rate increased from 2 to 3 head ha -1. N recycled in the litter decreased by 11 %. but a further increase to 4 head ha-1 decreased N recycling by 30% suggesting that beyond a certain critical level higher grazing stocking rates would lead to pasture decline if there was no N addition. High stocking rates decreased the proportion of the legume in the sward. but at all rates the concentration of N in both the green and dead grass in the forage on offer a... Mostrar Tudo |
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Thesagro: |
Brachiaria; Leguminosa Forrageira. |
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Thesaurus NAL: |
forage legumes. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02805naa a2200289 a 4500
001 1624177
005 2007-05-31
008 2002 bl --- 0-- u #d
100 1 $aCANTARUTTI, R. B.
245 $aThe effect of grazing intensity and the presence of a forage legume on nitrogen dynamics in Brachiaria pastures in the Atlantic forest region of the South of Bahia, Brazil.
260 $c2002
520 $aIt has been shown that with careful grazing management and addition of p and K. but not N. fertilisers Brachiaria pastures are able to maintain sustainable live weight gains over many years. However. standard on-farm practice. which generally involves high stocking rates. leads after a few years to pasture decline due mainly to N deficiency for grass regrowth. To generate an understanding of the mechanism of pasture decline and possible management options to mitigate this process. a study was performed in the Atlantic forest region of the south of Bahia state to study the N dynamics in pastures of Brachiaria humidicola subject to three different stocking rates of beef cattle. with and without the presence of the forage legume Desmodium ovalifolium. Despite the fact that the C:N ratio of the deposited litter was high (60 to 70) the rate of decomposition was very rapid (k --0.07 9 g-l day-1) and annual rates of N turnover through the litter pathway were between 105 and 170 kg N ha-1 year-1. In the grass-only pastures as stocking rate increased from 2 to 3 head ha -1. N recycled in the litter decreased by 11 %. but a further increase to 4 head ha-1 decreased N recycling by 30% suggesting that beyond a certain critical level higher grazing stocking rates would lead to pasture decline if there was no N addition. High stocking rates decreased the proportion of the legume in the sward. but at all rates the concentration of N in both the green and dead grass in the forage on offer and in the litter was higher in the mixed sward. The presence of the legume caused a decrease in the C:N ratio of the microbial biomass while both soil N minera1isation and nitrification increased. This increased rate of turnover of the microbia1 biomass and the contribution of N2 fixation to the legume resulted in large increases in the N recycled via litter deposition ranging from 42 to 155 kg N ha-1 year-1.
650 $aforage legumes
650 $aBrachiaria
650 $aLeguminosa Forrageira
700 1 $aTARRE, R.
700 1 $aMACEDO, R.
700 1 $aCADISCH, G.
700 1 $aREZENDE, C. de P.
700 1 $aPEREIRA, J. M.
700 1 $aBRAGA, J. M.
700 1 $aGOMIDE, J. A.
700 1 $aFERREIRA, E.
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tNutrient Cycling in Agroecossytems, Netherlands$gv. 64, p. 257-271, 2002.
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