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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba; Embrapa Pantanal. |
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Data corrente: |
12/02/1996 |
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Data da última atualização: |
12/02/1996 |
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Autoria: |
WEAVER, D. M.; RITCHIE, G. S. P.; ANDERSON, G. C. |
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Afiliação: |
University of Westen Australia. |
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Título: |
Phosphorus leaching in sandy soils. II. Laboratory studies of the long-term effects of the phosphorus source. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
Australian Journal of Soil Research, v.26, p.191-200, 1988. |
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Idioma: |
Inglês |
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Conteúdo: |
Long-term phosphorus (P) losses and gains in sandy soils continuously fertilized with either ordinary superphosphate or coastal superphosphate (a granulated mixture of superphosphate, rock phosphate and elemental sulfur) or previously fertilized with superphosphate were investigated under leaching conditions in columns in the laboratory. The soils were subjected to 10 consecutive cycles designed to simulate the mediterranean weather conditions in the Harvey region of the Coastal Plain of Western Australia. Each cycle consisted of a wet phase during which the equivalent of 850 mm of rainfall was leached through the soil and a drier phase during which the soil was incubated in the presence of moisture equivalent to summer rainfall (150 mm). Dissolved inorganic P in the leachate was used as a measure of P loss. A sequential fractionation procedure (a resin extraction followed by 0.5 M sodium bicarbonate, 0.1 M sodium hydroxide and 0.1 M sulfuric acid extractions) and total inorganic and organic P were used to measure changes in P levels in the soils. Phosphorus losses from the previously fertilized soils decreased logarithmically with increasing number of cycles. Total inorganic P and resin-extractable P were able to explain > 94% of the variation in P losses. Addition of either fertilizer increased the amount of P leached from the soil and 10-40% more P was leached by adding superphosphate rather than coastal superphosphate. The percentage of the cumulative P lost by leaching decreased with ... MenosLong-term phosphorus (P) losses and gains in sandy soils continuously fertilized with either ordinary superphosphate or coastal superphosphate (a granulated mixture of superphosphate, rock phosphate and elemental sulfur) or previously fertilized with superphosphate were investigated under leaching conditions in columns in the laboratory. The soils were subjected to 10 consecutive cycles designed to simulate the mediterranean weather conditions in the Harvey region of the Coastal Plain of Western Australia. Each cycle consisted of a wet phase during which the equivalent of 850 mm of rainfall was leached through the soil and a drier phase during which the soil was incubated in the presence of moisture equivalent to summer rainfall (150 mm). Dissolved inorganic P in the leachate was used as a measure of P loss. A sequential fractionation procedure (a resin extraction followed by 0.5 M sodium bicarbonate, 0.1 M sodium hydroxide and 0.1 M sulfuric acid extractions) and total inorganic and organic P were used to measure changes in P levels in the soils. Phosphorus losses from the previously fertilized soils decreased logarithmically with increasing number of cycles. Total inorganic P and resin-extractable P were able to explain > 94% of the variation in P losses. Addition of either fertilizer increased the amount of P leached from the soil and 10-40% more P was leached by adding superphosphate rather than coastal superphosphate. The percentage of the cumulative P lost by leaching ... Mostrar Tudo |
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Palavras-Chave: |
Efeito; Effect; Fertilized soils; Lixiviacao de fosforo; Phosphorus leaching; Solos adubados; Solos arenosos. |
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Thesagro: |
Fósforo; Lixiviação; Solo. |
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Thesaurus Nal: |
leaching; phosphorus; sandy soils; soil. |
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Categoria do assunto: |
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Marc: |
LEADER 02368naa a2200313 a 4500
001 1075989
005 1996-02-12
008 1988 bl --- 0-- u #d
100 1 $aWEAVER, D. M.
245 $aPhosphorus leaching in sandy soils. II. Laboratory studies of the long-term effects of the phosphorus source.
260 $c1988
520 $aLong-term phosphorus (P) losses and gains in sandy soils continuously fertilized with either ordinary superphosphate or coastal superphosphate (a granulated mixture of superphosphate, rock phosphate and elemental sulfur) or previously fertilized with superphosphate were investigated under leaching conditions in columns in the laboratory. The soils were subjected to 10 consecutive cycles designed to simulate the mediterranean weather conditions in the Harvey region of the Coastal Plain of Western Australia. Each cycle consisted of a wet phase during which the equivalent of 850 mm of rainfall was leached through the soil and a drier phase during which the soil was incubated in the presence of moisture equivalent to summer rainfall (150 mm). Dissolved inorganic P in the leachate was used as a measure of P loss. A sequential fractionation procedure (a resin extraction followed by 0.5 M sodium bicarbonate, 0.1 M sodium hydroxide and 0.1 M sulfuric acid extractions) and total inorganic and organic P were used to measure changes in P levels in the soils. Phosphorus losses from the previously fertilized soils decreased logarithmically with increasing number of cycles. Total inorganic P and resin-extractable P were able to explain > 94% of the variation in P losses. Addition of either fertilizer increased the amount of P leached from the soil and 10-40% more P was leached by adding superphosphate rather than coastal superphosphate. The percentage of the cumulative P lost by leaching decreased with ...
650 $aleaching
650 $aphosphorus
650 $asandy soils
650 $asoil
650 $aFósforo
650 $aLixiviação
650 $aSolo
653 $aEfeito
653 $aEffect
653 $aFertilized soils
653 $aLixiviacao de fosforo
653 $aPhosphorus leaching
653 $aSolos adubados
653 $aSolos arenosos
700 1 $aRITCHIE, G. S. P.
700 1 $aANDERSON, G. C.
773 $tAustralian Journal of Soil Research$gv.26, p.191-200, 1988.
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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| Registros recuperados : 4 | |
| 2. |  | TAKAYAMA, S. Y.; FREITAS, P. M de; PAGLIARINI, M. S.; BATISTA, L. A. R. Determinação do número de cromossomos em acessos de Paspalum (grupo plicatula). Revista Brasileira de Genética, Ribeirão Preto, SP, v.19, n.3, (Suppl.), p.133, Set. 1996.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| Registros recuperados : 4 | |
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