| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Gado de Corte. |
|
Data corrente: |
12/08/1997 |
|
Data da última atualização: |
15/01/2014 |
|
Autoria: |
SOUZA, O. C. |
|
Título: |
Sulfur oxidation influence on rock phosphate solubilization in soil. |
|
Ano de publicação: |
1985 |
|
Fonte/Imprenta: |
[S.l.]: Texas A&M University, 1985. |
|
Páginas: |
43p. |
|
Idioma: |
Inglês |
|
Notas: |
Tese Mestrado. |
|
Conteúdo: |
The low solubility of many rock phosphate (RP) around the world is the main cause of their ineffectiveness when applied to soil as a source of P for crops. The low solubility decreases their value as P fertilizers and prevents their widespread use, especially for high P demanding crops. One method proposed to enhance RP solubility is to add sulfur (S) as an amendment. The oxidation of S to H2SO4 in the soil results in dissolution of the applied RP. This study tested three Brazilian RP sources (Araxa, Catalao, and Patos de Minas) mixed with S at a ratio of 5:1 (RP:S). The application of the RP-S mixtures proved to be a promising alternative method for increasing RP solubility and thus their effectiveness as P sources. The soil pH decreased proportionally to increasing rates of RP-S application. The NaHCO3 extractable soil P increased as a consequence of increased soil acidefication. The ryegrass growth, P uptake, plant P concentration and P recovered from RP sources were enhanced only when S was mixed with the RPs. On the other hand, when RP sources were applied directly without S, the available soil P as measured by NaHCO3 extraction was depleted with time regardless of source or rate of RP. The inefficiency of the directly applied RP sources to supply adequate P was evidenced by less plant growth than applied with S. Also, in addition to this inadequate supply of for plant assimilation, the directly applied RP sources failed to develop a residual reserve of available P in the soil, even at very high application... MenosThe low solubility of many rock phosphate (RP) around the world is the main cause of their ineffectiveness when applied to soil as a source of P for crops. The low solubility decreases their value as P fertilizers and prevents their widespread use, especially for high P demanding crops. One method proposed to enhance RP solubility is to add sulfur (S) as an amendment. The oxidation of S to H2SO4 in the soil results in dissolution of the applied RP. This study tested three Brazilian RP sources (Araxa, Catalao, and Patos de Minas) mixed with S at a ratio of 5:1 (RP:S). The application of the RP-S mixtures proved to be a promising alternative method for increasing RP solubility and thus their effectiveness as P sources. The soil pH decreased proportionally to increasing rates of RP-S application. The NaHCO3 extractable soil P increased as a consequence of increased soil acidefication. The ryegrass growth, P uptake, plant P concentration and P recovered from RP sources were enhanced only when S was mixed with the RPs. On the other hand, when RP sources were applied directly without S, the available soil P as measured by NaHCO3 extraction was depleted with time regardless of source or rate of RP. The inefficiency of the directly applied RP sources to supply adequate P was evidenced by less plant growth than applied with S. Also, in addition to this inadequate supply of for plant assimilation, the directly applied RP sources failed to develop a residual reserve of available P in t... Mostrar Tudo |
|
Palavras-Chave: |
P; S. |
|
Thesagro: |
Enxofre; Fósforo; Oxidação; Solo; Solubilidade. |
|
Thesaurus Nal: |
oxidation; phosphorus; soil; solubility; sulfur. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02182nam a2200277 a 4500
001 1323242
005 2014-01-15
008 1985 bl uuuu m 00u1 u #d
100 1 $aSOUZA, O. C.
245 $aSulfur oxidation influence on rock phosphate solubilization in soil.
260 $a[S.l.]: Texas A&M University$c1985
300 $a43p.
500 $aTese Mestrado.
520 $aThe low solubility of many rock phosphate (RP) around the world is the main cause of their ineffectiveness when applied to soil as a source of P for crops. The low solubility decreases their value as P fertilizers and prevents their widespread use, especially for high P demanding crops. One method proposed to enhance RP solubility is to add sulfur (S) as an amendment. The oxidation of S to H2SO4 in the soil results in dissolution of the applied RP. This study tested three Brazilian RP sources (Araxa, Catalao, and Patos de Minas) mixed with S at a ratio of 5:1 (RP:S). The application of the RP-S mixtures proved to be a promising alternative method for increasing RP solubility and thus their effectiveness as P sources. The soil pH decreased proportionally to increasing rates of RP-S application. The NaHCO3 extractable soil P increased as a consequence of increased soil acidefication. The ryegrass growth, P uptake, plant P concentration and P recovered from RP sources were enhanced only when S was mixed with the RPs. On the other hand, when RP sources were applied directly without S, the available soil P as measured by NaHCO3 extraction was depleted with time regardless of source or rate of RP. The inefficiency of the directly applied RP sources to supply adequate P was evidenced by less plant growth than applied with S. Also, in addition to this inadequate supply of for plant assimilation, the directly applied RP sources failed to develop a residual reserve of available P in the soil, even at very high application...
650 $aoxidation
650 $aphosphorus
650 $asoil
650 $asolubility
650 $asulfur
650 $aEnxofre
650 $aFósforo
650 $aOxidação
650 $aSolo
650 $aSolubilidade
653 $aP
653 $aS
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Corte (CNPGC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Milho e Sorgo. |
|
Data corrente: |
20/03/1997 |
|
Data da última atualização: |
01/04/2013 |
|
Autoria: |
COELHO, A. M.; FRANCA, G. E.; BAHIA FILHO, A. F. C. |
|
Afiliação: |
ANTONIO MARCOS COELHO, CNPMS. |
|
Título: |
Dinâmica do nitrogênio em um Latossolo Vermelho Escuro fase cerrado cultivado com milho. |
|
Ano de publicação: |
1992 |
|
Fonte/Imprenta: |
In: EMBRAPA. Centro de Nacional de Pesquisa de Milho e Sorgo. Relatório técnico anual do Centro Nacional de Pesquisa de Milho e Sorgo 1988-1991. Sete Lagoas, 1992. p. 215. |
|
Idioma: |
Português |
|
Palavras-Chave: |
Maize; Red dark latosol; Savanna. |
|
Thesagro: |
Cerrado; Latossolo Vermelho Escuro; Milho; Nitrogênio; Zea Mays. |
|
Thesaurus NAL: |
nitrogen. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/80068/1/Dinamica-nitrogenio.pdf
|
|
Marc: |
LEADER 00806naa a2200241 a 4500
001 1474813
005 2013-04-01
008 1992 bl uuuu u00u1 u #d
100 1 $aCOELHO, A. M.
245 $aDinâmica do nitrogênio em um Latossolo Vermelho Escuro fase cerrado cultivado com milho.$h[electronic resource]
260 $c1992
650 $anitrogen
650 $aCerrado
650 $aLatossolo Vermelho Escuro
650 $aMilho
650 $aNitrogênio
650 $aZea Mays
653 $aMaize
653 $aRed dark latosol
653 $aSavanna
700 1 $aFRANCA, G. E.
700 1 $aBAHIA FILHO, A. F. C.
773 $tIn: EMBRAPA. Centro de Nacional de Pesquisa de Milho e Sorgo. Relatório técnico anual do Centro Nacional de Pesquisa de Milho e Sorgo 1988-1991. Sete Lagoas, 1992. p. 215.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
