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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
19/02/1997 |
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Data da última atualização: |
19/02/1997 |
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Autoria: |
LINDSAY, W. L.; SCHWAB, A. P. |
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Afiliação: |
Department of Agronomy, Colorado State University, Fort Collins, Colorado. |
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Título: |
The chemistry of iron in soils and its availability to plants. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Journal of Plant Nutrition, v.5, n.4/7, p.821-840, 1982. |
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Idioma: |
Inglês |
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Conteúdo: |
The solubility of iron in soils os controlled by Fe(OH)3(soil) in well-oxidized soils, by Fe3(OH)8(ferrosic hydroxide) in moderately oxidized soils, and by FeCO3(siderite) in highly reduced soils. The Fe(III) hydrolysis species Fe(OH)2+, and Fe(OH)3 are the major solution species of inorganic Fe, but they are maintained too low to supply available iron to plants. Iron is absorbed by plants as Fe2+ and must be in the general range > 10-7.7 M to avoid iron deficiency. The redox of soil-root environments must be <12 to supply adequate Fe2+ for plants. Hawkeye soybeans (Glycine max. L. Merrill) demonstrated the ability to reduce their environment to pe + pH 4 to 7 by release of electrons or other reductants into the root medium. Reduction by plants roots and associated microorganism is an important mechanism for solubilizing Fe2+. Iron chelates aid in the movement of iron to plant roots, but they are neither absorbed to any great extent nor do they raise the activity of Fe3+ or Fe2+ in the bulk soil solution. To be effective iron chelates must be stable in soil environments. Chemical equilibrium relationships are useful in predicting iron solubility and availability in soils. |
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Palavras-Chave: |
Critical nutrient level; Deficiencia de ferro; Iron deficiency; Nivel critico de nutriente; Reduction. |
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Thesagro: |
Absorção; Redução; Solubilidade. |
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Thesaurus Nal: |
absorption; chelation; solubility. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01907naa a2200265 a 4500
001 1790675
005 1997-02-19
008 1982 bl --- 0-- u #d
100 1 $aLINDSAY, W. L.
245 $aThe chemistry of iron in soils and its availability to plants.
260 $c1982
520 $aThe solubility of iron in soils os controlled by Fe(OH)3(soil) in well-oxidized soils, by Fe3(OH)8(ferrosic hydroxide) in moderately oxidized soils, and by FeCO3(siderite) in highly reduced soils. The Fe(III) hydrolysis species Fe(OH)2+, and Fe(OH)3 are the major solution species of inorganic Fe, but they are maintained too low to supply available iron to plants. Iron is absorbed by plants as Fe2+ and must be in the general range > 10-7.7 M to avoid iron deficiency. The redox of soil-root environments must be <12 to supply adequate Fe2+ for plants. Hawkeye soybeans (Glycine max. L. Merrill) demonstrated the ability to reduce their environment to pe + pH 4 to 7 by release of electrons or other reductants into the root medium. Reduction by plants roots and associated microorganism is an important mechanism for solubilizing Fe2+. Iron chelates aid in the movement of iron to plant roots, but they are neither absorbed to any great extent nor do they raise the activity of Fe3+ or Fe2+ in the bulk soil solution. To be effective iron chelates must be stable in soil environments. Chemical equilibrium relationships are useful in predicting iron solubility and availability in soils.
650 $aabsorption
650 $achelation
650 $asolubility
650 $aAbsorção
650 $aRedução
650 $aSolubilidade
653 $aCritical nutrient level
653 $aDeficiencia de ferro
653 $aIron deficiency
653 $aNivel critico de nutriente
653 $aReduction
700 1 $aSCHWAB, A. P.
773 $tJournal of Plant Nutrition$gv.5, n.4/7, p.821-840, 1982.
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Registro original: |
Embrapa Pantanal (CPAP) |
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