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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Gado de Leite; Embrapa Pantanal; Embrapa Soja. |
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Data corrente: |
12/02/1992 |
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Data da última atualização: |
20/11/2001 |
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Autoria: |
CARVALHO, M. M. de. |
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Título: |
A comparative study of the responses of six stylosanthes species to acid soil factors with particular reference to aluminium. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
[Brisbane: University of Queensland], 1978. |
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Páginas: |
298p. |
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Idioma: |
Inglês |
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Notas: |
PhD. Thesis. |
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Conteúdo: |
The present investigation was conducted to examine the comparative ability of six Stylosanthes species to tolerate acid soil infertility factors with particular reference to aluminium. Initially, a pot experiment was conducted to identify those factors limiting the growth of Stylosanthes in three acid soils from south east Queensland. All six species responded positively to lime application in the three soils, while responses to phosphate application varied with soils, species and lime rates. Lowest dry matter yield in the unlimed soils was associated with solution aluminium concentration in the saturation extract ranging from 37 to 55 uM. Maximum growth of all species occurred when the solution aluminium concentrations were reduced to the range 17 to 22 uM by the highest lime rates, which reduced the aluminium saturation of the effective CEC to less than 5 percent in all three soils. The growth response to lime was attributed to the alleviation of alluminium toxicity. Subsequent experiments conducted using sand culture that aluminium could restrict the growth of Stylosanthes species both through effects on host plant growth and on the development of an effective legume - Rhizobium symbiosis. However, plant growth was shown to be considerably more tolerant to aluminium toxicity when supplied with adequate combined nitrogen than when dependent on symbiotic nitrogen fixation. The greater sensitivity to aluminium toxicity of plants dependent on symbiotic nitrogen fixation was shown to be due to the greater... MenosThe present investigation was conducted to examine the comparative ability of six Stylosanthes species to tolerate acid soil infertility factors with particular reference to aluminium. Initially, a pot experiment was conducted to identify those factors limiting the growth of Stylosanthes in three acid soils from south east Queensland. All six species responded positively to lime application in the three soils, while responses to phosphate application varied with soils, species and lime rates. Lowest dry matter yield in the unlimed soils was associated with solution aluminium concentration in the saturation extract ranging from 37 to 55 uM. Maximum growth of all species occurred when the solution aluminium concentrations were reduced to the range 17 to 22 uM by the highest lime rates, which reduced the aluminium saturation of the effective CEC to less than 5 percent in all three soils. The growth response to lime was attributed to the alleviation of alluminium toxicity. Subsequent experiments conducted using sand culture that aluminium could restrict the growth of Stylosanthes species both through effects on host plant growth and on the development of an effective legume - Rhizobium symbiosis. However, plant growth was shown to be considerably more tolerant to aluminium toxicity when supplied with adequate combined nitrogen than when dependent on symbiotic nitrogen fixation. The greater sensitivity to aluminium toxicity of plants dependent on symbiotic nitrogen fixation was s... Mostrar Tudo |
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Palavras-Chave: |
Alluminium; Aluminium; Fertilizacao; Fertilization; Forages plants; Plantas forrageiras; Soils; Solos; Stilosante. |
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Thesagro: |
Acidez; Agronomia; Alumínio; Nutrição; Solo; Solo Ácido. |
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Thesaurus Nal: |
acidity; agronomy; nutrition; soil; Stylosanthes. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02483nam a2200373 a 4500
001 1558650
005 2001-11-20
008 1978 bl uuuu m 00u1 u #d
100 1 $aCARVALHO, M. M. de
245 $aA comparative study of the responses of six stylosanthes species to acid soil factors with particular reference to aluminium.
260 $a[Brisbane: University of Queensland]$c1978
300 $a298p.
500 $aPhD. Thesis.
520 $aThe present investigation was conducted to examine the comparative ability of six Stylosanthes species to tolerate acid soil infertility factors with particular reference to aluminium. Initially, a pot experiment was conducted to identify those factors limiting the growth of Stylosanthes in three acid soils from south east Queensland. All six species responded positively to lime application in the three soils, while responses to phosphate application varied with soils, species and lime rates. Lowest dry matter yield in the unlimed soils was associated with solution aluminium concentration in the saturation extract ranging from 37 to 55 uM. Maximum growth of all species occurred when the solution aluminium concentrations were reduced to the range 17 to 22 uM by the highest lime rates, which reduced the aluminium saturation of the effective CEC to less than 5 percent in all three soils. The growth response to lime was attributed to the alleviation of alluminium toxicity. Subsequent experiments conducted using sand culture that aluminium could restrict the growth of Stylosanthes species both through effects on host plant growth and on the development of an effective legume - Rhizobium symbiosis. However, plant growth was shown to be considerably more tolerant to aluminium toxicity when supplied with adequate combined nitrogen than when dependent on symbiotic nitrogen fixation. The greater sensitivity to aluminium toxicity of plants dependent on symbiotic nitrogen fixation was shown to be due to the greater...
650 $aacidity
650 $aagronomy
650 $anutrition
650 $asoil
650 $aStylosanthes
650 $aAcidez
650 $aAgronomia
650 $aAlumínio
650 $aNutrição
650 $aSolo
650 $aSolo Ácido
653 $aAlluminium
653 $aAluminium
653 $aFertilizacao
653 $aFertilization
653 $aForages plants
653 $aPlantas forrageiras
653 $aSoils
653 $aSolos
653 $aStilosante
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 84 | |
| 18. |  | MOZZER, O. L.; CARVALHO, M. M. de; EMRICH, E. S. Competição de variedades e híbridos de capim-elefante (Pennisetum purpureum), para formação de capineiras em solo de cerrado. Pesquisa Agropecuária Brasileira, Rio de Janeiro, v. 5, p. 395-403, 1970. (Agronomia, 3). Título em inglês: Comparison of elephant grass (Pennisetum purpureum) varieties in campo Cerrado Soils.
A partir do v. 3(1968) é constituída de duas partes: Série Agronomia e Série Veterinária, publicadas também separadamente.| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 84 | |
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