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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
24/09/1997 |
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Data da última atualização: |
24/09/1997 |
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Autoria: |
MORAD, P.; BERNADAC, A.; VALLES, V. |
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Título: |
Selectivity of the root absorption of nutrient ions in grain sorghum. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Journal of Plant Nutrition, v.13, n.2, p.249-268, 1990. |
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Idioma: |
Inglês |
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Conteúdo: |
Root absorption selectivity, which refers to the fact that the nineral elements are not found in the same proportions in the plant as in the growth medium, was characterized using plots where the proportions between the elements were considered. Grain sorghum was grown hydroponically in nutrient solutions where the cations macroelements were increasingly replaced with sodium and the anionic macronutrients with chloride. The data obtained from the analyses of the nutrient solutions and of the whole plants show that root selectivity promotes the absorption of K+ and NO3-N and impede that of Ca++ whereas there is nearly no selectivity towards the other nutrients (Mg, P, S). The high negative selectivity towards unessential elements (Na and Cl) is reflected by their very low proportions within the plant. |
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Palavras-Chave: |
Nutrient; Raizes; Root absortion; Selectivity; Seletividade. |
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Thesagro: |
Absorção de Nutrientes; Sorghum Vulgare; Sorgo. |
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Thesaurus Nal: |
grain sorghum. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01474naa a2200253 a 4500
001 1079015
005 1997-09-24
008 1990 bl --- 0-- u #d
100 1 $aMORAD, P.
245 $aSelectivity of the root absorption of nutrient ions in grain sorghum.
260 $c1990
520 $aRoot absorption selectivity, which refers to the fact that the nineral elements are not found in the same proportions in the plant as in the growth medium, was characterized using plots where the proportions between the elements were considered. Grain sorghum was grown hydroponically in nutrient solutions where the cations macroelements were increasingly replaced with sodium and the anionic macronutrients with chloride. The data obtained from the analyses of the nutrient solutions and of the whole plants show that root selectivity promotes the absorption of K+ and NO3-N and impede that of Ca++ whereas there is nearly no selectivity towards the other nutrients (Mg, P, S). The high negative selectivity towards unessential elements (Na and Cl) is reflected by their very low proportions within the plant.
650 $agrain sorghum
650 $aAbsorção de Nutrientes
650 $aSorghum Vulgare
650 $aSorgo
653 $aNutrient
653 $aRaizes
653 $aRoot absortion
653 $aSelectivity
653 $aSeletividade
700 1 $aBERNADAC, A.
700 1 $aVALLES, V.
773 $tJournal of Plant Nutrition$gv.13, n.2, p.249-268, 1990.
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Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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