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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria Tropical. |
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Data corrente: |
15/09/1993 |
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Data da última atualização: |
15/09/1993 |
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Autoria: |
FAGERIA, N. K.; CARVALHO, J. R. P. |
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Título: |
Influence of aluminum in nutrient solutions on chemical composition in upland rice cultivars. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Plant and Soil, v.69, p.31-44, 1982. |
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Idioma: |
Inglês |
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Conteúdo: |
Aluminum toxicity is an important growth limiting factor for upland rice production on oxisols of cerrado region in Brazil. Data related to the effect of Al on uptake of nutrients for rice crop are limited. The effect of five Al concentrations (0, 10, 20, 40 and 60 ppm) in culture solution on the chemical composition of 30 upland rice cultivars was studied. Aluminum concentration and content in plant tissues were increased with higher levels of Al in all cultivar. In the roots Al content was higher as compared with the tops. Critical toxic level of Al in the tops of 21 days old plants varied from 100 to 417 ppm depending on the cultivars. Rice cultivars responded differently to Al treatments with respect to nutrients uptake. Increased Al concentrations in the solution exerted an inhibiting effect on the concentrations and contents of N, P, K, Ca, Mg, S, Na, Zn, Fe, Mn, B and Cu. Thus the inhibition was more effective for macronutrients in the plant tops in following order: Mg > Ca > P > K > N > S > Na. Whereas for micronutrients it was in the order of Mn > Zn > Fe > Cu > B. Morphiological, physiological and biochemical effects of Al, toxicity responsible for the reduction in plant nutrient uptake, are discussed. |
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Palavras-Chave: |
Alumiio - toxicidade; Arroz - sequeira - componentes quimicos; Arroz - sequeiro - macronutrientes; Arroz - sequeiro - micronutrientes; Arroz - sequeiro - nutrientes. |
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Thesagro: |
Oryza Sativa. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01910naa a2200205 a 4500
001 1417807
005 1993-09-15
008 1982 bl --- 0-- u #d
100 1 $aFAGERIA, N. K.
245 $aInfluence of aluminum in nutrient solutions on chemical composition in upland rice cultivars.
260 $c1982
520 $aAluminum toxicity is an important growth limiting factor for upland rice production on oxisols of cerrado region in Brazil. Data related to the effect of Al on uptake of nutrients for rice crop are limited. The effect of five Al concentrations (0, 10, 20, 40 and 60 ppm) in culture solution on the chemical composition of 30 upland rice cultivars was studied. Aluminum concentration and content in plant tissues were increased with higher levels of Al in all cultivar. In the roots Al content was higher as compared with the tops. Critical toxic level of Al in the tops of 21 days old plants varied from 100 to 417 ppm depending on the cultivars. Rice cultivars responded differently to Al treatments with respect to nutrients uptake. Increased Al concentrations in the solution exerted an inhibiting effect on the concentrations and contents of N, P, K, Ca, Mg, S, Na, Zn, Fe, Mn, B and Cu. Thus the inhibition was more effective for macronutrients in the plant tops in following order: Mg > Ca > P > K > N > S > Na. Whereas for micronutrients it was in the order of Mn > Zn > Fe > Cu > B. Morphiological, physiological and biochemical effects of Al, toxicity responsible for the reduction in plant nutrient uptake, are discussed.
650 $aOryza Sativa
653 $aAlumiio - toxicidade
653 $aArroz - sequeira - componentes quimicos
653 $aArroz - sequeiro - macronutrientes
653 $aArroz - sequeiro - micronutrientes
653 $aArroz - sequeiro - nutrientes
700 1 $aCARVALHO, J. R. P.
773 $tPlant and Soil$gv.69, p.31-44, 1982.
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Embrapa Agroindústria Tropical (CNPAT) |
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