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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
06/05/1997 |
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Data da última atualização: |
06/05/1997 |
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Autoria: |
BORGES, A. L.; SILVA, J. T. A. da; OLIVEIRA, S. L. de. |
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Afiliação: |
EMBRAPA-CNPMF; EPAMIG-CRNM. |
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Título: |
Adubacao nitrogenada e potassica para bananeira irrigada. Efeitos na producao e qualidade dos frutos no primeiro ciclo |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Curitiba, PR: IAPAR/SBF, 1996. |
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Páginas: |
p.88 |
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Idioma: |
Português |
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Conteúdo: |
As recomendacoes de adubacao para os cultivos de banana irrigada tem sido feitas com base na analise de solo, porem com informacoes obtidas de experimentos sob condicoes de sequeiro. Nestas circunstancias, a planta nao tem expressado seu potencial produtivo e de qualidade de frutos. Assim, instalou-se um ensaio na regiao semi-arida do Norte do Estado de Minas Gerais, com a cv. Prata Ana, objetivando definir para bananeira irrigada as doses de nitrogenio (N) e de potassio (K) que resultem na maxima producao economica e melhor qualidade dos frutos. Estudaram-se cinco niveis de N (0, 200, 400, 800 e 1.600 kg/ha/ano) e cinco niveis de K20 (0, 200, 400, 800 e 1.600 kg/ha/ano), no delineamento experimental de blocos casualizados, em esquema fatorial, com quatro repeticoes. Oss resulatdos do primeiro ciclo da cultura nao indicaram efeito interativo das doses de N e K estudadas. O nitrogenio aumentou o ciclo da cultura. A analise de regressao mostrou que a adicao de 220 kg K20/ha/ano proporcionou mair peso de pencas, o qual nao foi significativamente influenciado pela adubacao nitrogenada. A combinacao de 400 kg N/ha/ano e 400 kg K20/ha/ano propiciou maior percentagem de frutos de primeira qualidade. Os resultados obtidos nao sao conclusivos; o estudo continuara por mais dois ciclos da cultura. |
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Palavras-Chave: |
Adubacao nitrogenada; Adubacao potassica; Congress; Congresso; Nitrogenous fertilization; Potassium fertilization. |
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Thesagro: |
Banana; Irrigação; Musa sp. |
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Thesaurus Nal: |
irrigation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02077naa a2200277 a 4500
001 1644722
005 1997-05-06
008 1996 bl uuuu u00u1 u #d
100 1 $aBORGES, A. L.
245 $aAdubacao nitrogenada e potassica para bananeira irrigada. Efeitos na producao e qualidade dos frutos no primeiro ciclo
260 $c1996
300 $ap.88
520 $aAs recomendacoes de adubacao para os cultivos de banana irrigada tem sido feitas com base na analise de solo, porem com informacoes obtidas de experimentos sob condicoes de sequeiro. Nestas circunstancias, a planta nao tem expressado seu potencial produtivo e de qualidade de frutos. Assim, instalou-se um ensaio na regiao semi-arida do Norte do Estado de Minas Gerais, com a cv. Prata Ana, objetivando definir para bananeira irrigada as doses de nitrogenio (N) e de potassio (K) que resultem na maxima producao economica e melhor qualidade dos frutos. Estudaram-se cinco niveis de N (0, 200, 400, 800 e 1.600 kg/ha/ano) e cinco niveis de K20 (0, 200, 400, 800 e 1.600 kg/ha/ano), no delineamento experimental de blocos casualizados, em esquema fatorial, com quatro repeticoes. Oss resulatdos do primeiro ciclo da cultura nao indicaram efeito interativo das doses de N e K estudadas. O nitrogenio aumentou o ciclo da cultura. A analise de regressao mostrou que a adicao de 220 kg K20/ha/ano proporcionou mair peso de pencas, o qual nao foi significativamente influenciado pela adubacao nitrogenada. A combinacao de 400 kg N/ha/ano e 400 kg K20/ha/ano propiciou maior percentagem de frutos de primeira qualidade. Os resultados obtidos nao sao conclusivos; o estudo continuara por mais dois ciclos da cultura.
650 $airrigation
650 $aBanana
650 $aIrrigação
650 $aMusa sp
653 $aAdubacao nitrogenada
653 $aAdubacao potassica
653 $aCongress
653 $aCongresso
653 $aNitrogenous fertilization
653 $aPotassium fertilization
700 1 $aSILVA, J. T. A. da
700 1 $aOLIVEIRA, S. L. de
773 $tCuritiba, PR: IAPAR/SBF, 1996.
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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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Embrapa Agrobiologia (CNPAB) |
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