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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
08/02/1996 |
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Data da última atualização: |
08/02/1996 |
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Autoria: |
METWALLY, A. I.; HAMDY, H.; EL-BAZ, S. |
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Título: |
Evaluation of various parameters for available phosphorus in alluvial and calcareous soils of Eypt. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Journal Plant Nutrition Soil Science, v.6, p.595-604, 1975. |
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Idioma: |
Inglês |
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Conteúdo: |
The evaluation of different phosphate parameters (intensity, capacity, and composite fac-
tors) for the assessment of available soil phosphorus was carried out with the aid of phos-
phorus-32, in alluvial and calcareous soils. There was no significant correlation existing between P content in rye and the intensity factor which represents the concentration of phosphate in the soil solution extracted by 0.01 M CaCl2 in alluvial and calcareous soil. Capacity factor measured by means of isotopic exchange techniques and the bicarbonate method, were higly correlated with the actual amount of P taken up by ryegrass plant for both alluvial and calcareous soils. The E 14 days technique gave the highest correlation followed by the L-value, then the E 18 hrs, whereas the bicarbonate technique gave the lowest value. Thus, the isotopically exhangeable P is valuable in assessing its availability to plants. Composite factor measured by removing the phosphate from ther solution phase by anion exchange resin gave the highest degree of correlation which supports the hypo-
thesis that the rate of replenishment of the soil solution with phosphate must be taken into consideration. |
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Palavras-Chave: |
Egito; Solo calcareo. |
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Thesagro: |
Fertilidade; Fósforo. |
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Thesaurus Nal: |
calcareous soils; Egypt; phosphorus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01802naa a2200229 a 4500
001 1787157
005 1996-02-08
008 1975 bl --- 0-- u #d
100 1 $aMETWALLY, A. I.
245 $aEvaluation of various parameters for available phosphorus in alluvial and calcareous soils of Eypt.
260 $c1975
520 $aThe evaluation of different phosphate parameters (intensity, capacity, and composite fac- tors) for the assessment of available soil phosphorus was carried out with the aid of phos- phorus-32, in alluvial and calcareous soils. There was no significant correlation existing between P content in rye and the intensity factor which represents the concentration of phosphate in the soil solution extracted by 0.01 M CaCl2 in alluvial and calcareous soil. Capacity factor measured by means of isotopic exchange techniques and the bicarbonate method, were higly correlated with the actual amount of P taken up by ryegrass plant for both alluvial and calcareous soils. The E 14 days technique gave the highest correlation followed by the L-value, then the E 18 hrs, whereas the bicarbonate technique gave the lowest value. Thus, the isotopically exhangeable P is valuable in assessing its availability to plants. Composite factor measured by removing the phosphate from ther solution phase by anion exchange resin gave the highest degree of correlation which supports the hypo- thesis that the rate of replenishment of the soil solution with phosphate must be taken into consideration.
650 $acalcareous soils
650 $aEgypt
650 $aphosphorus
650 $aFertilidade
650 $aFósforo
653 $aEgito
653 $aSolo calcareo
700 1 $aHAMDY, H.
700 1 $aEL-BAZ, S.
773 $tJournal Plant Nutrition Soil Science$gv.6, p.595-604, 1975.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 20.712 | |
| 20703. |  | MIRANDA, J. E. C. de; FRANÇA, F. H.; CARRIJO, O. A.; SOUZA, A. F.; PEREIRA, W.; LOPES, C. A.; SILVA, J. B. C. A cultura da batata-doce. Brasília, DF: Embrapa-SPI, 1995. 94 p. (Embrapa-SPI. Coleção Plantar, 30). Projeto Minibibliotecas.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 20712. | | CARVALHO, P. E. R. Espécies arbóreas brasileiras. Brasília, DF: Embrapa Informação Tecnológica; Colombo: Embrapa Florestas, 2003-2014. 5 v. (Coleção espécies arbóreas brasileiras, v. 1-5). O v. 2 foi publicado em 2006. O v. 3 foi publicado em 2008. O v. 4 foi publicado em 2010. O v. 5 foi publicado em 2014.| Tipo: Autoria/Organização/Edição de Livros |
| Biblioteca(s): Embrapa Florestas. |
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| Registros recuperados : 20.712 | |
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