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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
21/06/2000 |
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Data da última atualização: |
21/06/2000 |
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Autoria: |
WERNER, J. C. |
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Título: |
Response of two species of Stylosanthes Sw. to levels of lime, phosphorus, potassium, and boron on three mineral soils. |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
[S.l.]: University of Florida, 1979. |
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Páginas: |
205p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Dissertation. |
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Conteúdo: |
A greenhouse experiment was conducted to study the response of stylo (Stylosanthes guianensis (Aubl.) Sw.) cv. Schofield and Caribbean stylo (Stylosanthes hamata (L.) Taub.) cv. Verano to levels of lime, P, K, and B on three Florida mineral soils: Orangeburg loamy sand (fine-loamy, siliceous, thermic Typic Paleudult; Astatula sand (hyperthermic uncoated Typic Quartzipsament; and Myakka fine sand (sandy, siliceous, hyperthermic Aeric Heric Haplaquod). The set of experimental treatments was a modified central composite in four factors each at five levels arranged in a response surface design. Before planting each pot was leached with 1 liter of distilled water to remove nitrates+nitrites+ammonium accumulated from N mineralization during incubation period. Leachate and soil samples were taken at this time. Mineralization of organic matter, pH, exchangeable Ca, extractable P, and ECEC increased with increasing levels of lime in all three soils; exchangeable H and Al, and extreactable Fe decreased. Extractable Ca and pH of all three soils were lower at harvest time than at planting time at all levels of lime. Extractable K also decreased to extremely low levels even in the treatments that received the highest rate of K. Extractable Ca and pH values were lower when the soils were grown with stylo with Caribbean stylo. Stylo yielded more than Caribbean stylo in all three soils, and their Ca concentrations were also higher. Caribbean stylo was more responsive to lime than stylo. In the Ultisol Caribbean stylo yields increased with low but decreased with higher levels. Meanwhile, lime depressed stylo yields starting from the first level. In the Entisol and Spodosol, Caribbean stylo responded to the highest level while stylo responded only to intermediate levels and decreased at the higher levels. Decreases in pH and extractable Ca during cropping may have accounted for the higher response to lime in the Entisol and Spodosol. Each species showed a large response to P and K in all three soils. Herbage K concentrations in the treatments without or with low levels of K were very low and the plants showed distinct symptoms of K deficiency. Increasing B levels decreased stylo yield and produced distinct foliar symptoms of toxicity as B levels increased. Caribbean stylo yield was not affected, although it showed distinct symptoms of toxicity at the highest levels of B. Increasing levels of P increased N concetration of each species. Consequently total N increased. Increasing levels of K tended to reduce N concentrations in each species, but since increasing levels of K had larger positive effects on dry matter yields, increased total N resulted. A very low N concentration and content of each species in the unlimed Spodosol coincided with a lack of nodulation. Na intense and general chlorosis and leaf drop indicated a very acute N deficiency caused by lack of N fixation. Sodium concentrations in herbage of stylo were very low and increased very little with increasing Tevels of NaH2PO4. Conversely, the roots were very high in sodium and increased progressively with levels of NaH2PO4, indicating that stylo has a mechanism that impairs the translocation of absorbed Na to plant tops. Increasing levels of lime decreased B, Zn, Mn, and Cu concentrations in herbage of each species all three soils. MenosA greenhouse experiment was conducted to study the response of stylo (Stylosanthes guianensis (Aubl.) Sw.) cv. Schofield and Caribbean stylo (Stylosanthes hamata (L.) Taub.) cv. Verano to levels of lime, P, K, and B on three Florida mineral soils: Orangeburg loamy sand (fine-loamy, siliceous, thermic Typic Paleudult; Astatula sand (hyperthermic uncoated Typic Quartzipsament; and Myakka fine sand (sandy, siliceous, hyperthermic Aeric Heric Haplaquod). The set of experimental treatments was a modified central composite in four factors each at five levels arranged in a response surface design. Before planting each pot was leached with 1 liter of distilled water to remove nitrates+nitrites+ammonium accumulated from N mineralization during incubation period. Leachate and soil samples were taken at this time. Mineralization of organic matter, pH, exchangeable Ca, extractable P, and ECEC increased with increasing levels of lime in all three soils; exchangeable H and Al, and extreactable Fe decreased. Extractable Ca and pH of all three soils were lower at harvest time than at planting time at all levels of lime. Extractable K also decreased to extremely low levels even in the treatments that received the highest rate of K. Extractable Ca and pH values were lower when the soils were grown with stylo with Caribbean stylo. Stylo yielded more than Caribbean stylo in all three soils, and their Ca concentrations were also higher. Caribbean stylo was more responsive to lime than stylo. In ... Mostrar Tudo |
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Palavras-Chave: |
Feed legumes; Stilosante; Stylosanthes guyanensis. |
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Thesagro: |
Boro; Calagem; Fósforo; Leguminosa Forrageira; Potássio; Solo. |
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Thesaurus Nal: |
boron; liming; phosphorus; potassium; soil; Stylosanthes hamata. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 04158nam a2200313 a 4500
001 1560013
005 2000-06-21
008 1979 bl uuuu m 00u1 u #d
100 1 $aWERNER, J. C.
245 $aResponse of two species of Stylosanthes Sw. to levels of lime, phosphorus, potassium, and boron on three mineral soils.
260 $a[S.l.]: University of Florida$c1979
300 $a205p.
500 $aPh.D. Dissertation.
520 $aA greenhouse experiment was conducted to study the response of stylo (Stylosanthes guianensis (Aubl.) Sw.) cv. Schofield and Caribbean stylo (Stylosanthes hamata (L.) Taub.) cv. Verano to levels of lime, P, K, and B on three Florida mineral soils: Orangeburg loamy sand (fine-loamy, siliceous, thermic Typic Paleudult; Astatula sand (hyperthermic uncoated Typic Quartzipsament; and Myakka fine sand (sandy, siliceous, hyperthermic Aeric Heric Haplaquod). The set of experimental treatments was a modified central composite in four factors each at five levels arranged in a response surface design. Before planting each pot was leached with 1 liter of distilled water to remove nitrates+nitrites+ammonium accumulated from N mineralization during incubation period. Leachate and soil samples were taken at this time. Mineralization of organic matter, pH, exchangeable Ca, extractable P, and ECEC increased with increasing levels of lime in all three soils; exchangeable H and Al, and extreactable Fe decreased. Extractable Ca and pH of all three soils were lower at harvest time than at planting time at all levels of lime. Extractable K also decreased to extremely low levels even in the treatments that received the highest rate of K. Extractable Ca and pH values were lower when the soils were grown with stylo with Caribbean stylo. Stylo yielded more than Caribbean stylo in all three soils, and their Ca concentrations were also higher. Caribbean stylo was more responsive to lime than stylo. In the Ultisol Caribbean stylo yields increased with low but decreased with higher levels. Meanwhile, lime depressed stylo yields starting from the first level. In the Entisol and Spodosol, Caribbean stylo responded to the highest level while stylo responded only to intermediate levels and decreased at the higher levels. Decreases in pH and extractable Ca during cropping may have accounted for the higher response to lime in the Entisol and Spodosol. Each species showed a large response to P and K in all three soils. Herbage K concentrations in the treatments without or with low levels of K were very low and the plants showed distinct symptoms of K deficiency. Increasing B levels decreased stylo yield and produced distinct foliar symptoms of toxicity as B levels increased. Caribbean stylo yield was not affected, although it showed distinct symptoms of toxicity at the highest levels of B. Increasing levels of P increased N concetration of each species. Consequently total N increased. Increasing levels of K tended to reduce N concentrations in each species, but since increasing levels of K had larger positive effects on dry matter yields, increased total N resulted. A very low N concentration and content of each species in the unlimed Spodosol coincided with a lack of nodulation. Na intense and general chlorosis and leaf drop indicated a very acute N deficiency caused by lack of N fixation. Sodium concentrations in herbage of stylo were very low and increased very little with increasing Tevels of NaH2PO4. Conversely, the roots were very high in sodium and increased progressively with levels of NaH2PO4, indicating that stylo has a mechanism that impairs the translocation of absorbed Na to plant tops. Increasing levels of lime decreased B, Zn, Mn, and Cu concentrations in herbage of each species all three soils.
650 $aboron
650 $aliming
650 $aphosphorus
650 $apotassium
650 $asoil
650 $aStylosanthes hamata
650 $aBoro
650 $aCalagem
650 $aFósforo
650 $aLeguminosa Forrageira
650 $aPotássio
650 $aSolo
653 $aFeed legumes
653 $aStilosante
653 $aStylosanthes guyanensis
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Registro original: |
Embrapa Cerrados (CPAC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
17/03/2009 |
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Data da última atualização: |
09/01/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
MILDE, G. A.; DEDECEK, R. A.; GAVA, J. L. |
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Afiliação: |
Gilson Antonio Milde, UFPR; Renato Antonio Dedecek, Embrapa Florestas; José Luiz Gava, Suzano de Papel e Celulose. |
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Título: |
Diâmetro médio ponderado de partículas para estimativa de propriedades físico-hídricas dos solos. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Pesquisa Florestal Brasileira, Colombo, n. 57, p. 21-27, jul./dez. 2008. |
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Idioma: |
Português |
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Conteúdo: |
O principal objetivo deste trabalho foi estimar características físico-hídricas do solo de difícil obtenção, através de modelos matemáticos baseados em variáveis das análises de rotina. Foram selecionados, em áreas de plantações florestais, 13 solos variando de 40 a 590 g kg-1 de conteúdo de argila. Nestes solos, foram obtidas amostras deformadas e indeformadas na camada de 5 cm a 15 cm, e realizadas, em laboratório, análises químicas (complexo sortivo, pH, acidez potencial) e físicas (densidade do solo, curva de retenção de umidade e porosidades). Estabeleceram-se correlações entre as variáveis umidade ótima do solo para compactação e umidade na capacidade de campo com todos os parâmetros químicos e físicos analisados. A característica do solo que apresentou o maior índice de correlação com umidade ótima (r = 0,95) e com capacidade de campo (r = 0,93) foi o diâmetro médio ponderado de partículas (DMPP). O DMPP pode ser obtido em todos os levantamentos de solo já realizados e é a soma da multiplicação entre o diâmetro médio das quatro frações granulométricas e suas concentrações no solo. A umidade do solo à -1500 kPa também se correlacionou com o DMPP (r = 0,93), o que permite estimar a quantidade de água disponível para as plantas. |
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Palavras-Chave: |
Curva de retenção de água; Função de pedotransferência; Umidade ótima para compactação. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/17104/1/PFB_57_p21-27.pdf
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Marc: |
LEADER 01902naa a2200181 a 4500
001 1312868
005 2015-01-09
008 2008 bl uuuu u00u1 u #d
100 1 $aMILDE, G. A.
245 $aDiâmetro médio ponderado de partículas para estimativa de propriedades físico-hídricas dos solos.
260 $c2008
520 $aO principal objetivo deste trabalho foi estimar características físico-hídricas do solo de difícil obtenção, através de modelos matemáticos baseados em variáveis das análises de rotina. Foram selecionados, em áreas de plantações florestais, 13 solos variando de 40 a 590 g kg-1 de conteúdo de argila. Nestes solos, foram obtidas amostras deformadas e indeformadas na camada de 5 cm a 15 cm, e realizadas, em laboratório, análises químicas (complexo sortivo, pH, acidez potencial) e físicas (densidade do solo, curva de retenção de umidade e porosidades). Estabeleceram-se correlações entre as variáveis umidade ótima do solo para compactação e umidade na capacidade de campo com todos os parâmetros químicos e físicos analisados. A característica do solo que apresentou o maior índice de correlação com umidade ótima (r = 0,95) e com capacidade de campo (r = 0,93) foi o diâmetro médio ponderado de partículas (DMPP). O DMPP pode ser obtido em todos os levantamentos de solo já realizados e é a soma da multiplicação entre o diâmetro médio das quatro frações granulométricas e suas concentrações no solo. A umidade do solo à -1500 kPa também se correlacionou com o DMPP (r = 0,93), o que permite estimar a quantidade de água disponível para as plantas.
653 $aCurva de retenção de água
653 $aFunção de pedotransferência
653 $aUmidade ótima para compactação
700 1 $aDEDECEK, R. A.
700 1 $aGAVA, J. L.
773 $tPesquisa Florestal Brasileira, Colombo$gn. 57, p. 21-27, jul./dez. 2008.
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