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Biblioteca(s): |
Embrapa Acre; Embrapa Agrobiologia; Embrapa Agropecuária Oeste; Embrapa Algodão; Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Clima Temperado; Embrapa Gado de Leite; Embrapa Hortaliças; Embrapa Instrumentação; Embrapa Meio Ambiente; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Meio-Norte; Embrapa Milho e Sorgo; Embrapa Pantanal; Embrapa Rondônia; Embrapa Roraima; Embrapa Semiárido; Embrapa Soja; Embrapa Solos; Embrapa Tabuleiros Costeiros; Embrapa Uva e Vinho. MenosEmbrapa Acre; Embrapa Agrobiologia; Embrapa Agropecuária Oeste; Embrapa Algodão; Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Clima Temperado; Embrapa Gado de Leite... Mostrar Todas |
Data corrente: |
16/07/1992 |
Data da última atualização: |
26/03/2015 |
Autoria: |
RAIJ, B. van. |
Título: |
Gesso agricola na melhoria do ambiente radicular no subsolo. |
Ano de publicação: |
1988 |
Fonte/Imprenta: |
São Paulo: Associação Nacional para Difusao de Adubos e Corretivos Agrícolas, 1988. |
Páginas: |
88 p. |
Idioma: |
Português |
Conteúdo: |
This is a review on the use of gypsum as a subsoil ameliorator. Gypsum is a byproduct of the phosphoric acid production that is being recommended as subsoil amendment, aiming to improve deep rooting of crops. However, there is still controversy about its use for this purpose. Large areas of brazilian soils have acid subsoils, with low calcium and high aluminum contents, conditions that constitute chemical bariers for root penetration. The harmful effect of aluminm on root development is well known. Furthermore, the presence of calcium in the root envrironment is essential since this element is not translocated from upper to other parts of the plants. Gypsum, or calcium sulfate, is a soluble salt that, unlike limestone, penetrtes into the subsoil. The most direct effect is an increase in calcium, which provides a decrease of aluminum saturation by a dilution effect. However, several papers report an effect of gypsum in reducing exchangeable aluminum. Possible rasons for this are discussed. Studies in soil solutions and nutrient solutions containing aluminum have shown that aluminum activities present negative relations with root development. On the other hand, gypsum reduces aluminum activity and as such improves root development. Field trials have shown the effect of surface applied gypsum in deepening the roots of cultivated plants in acid subsoils. In some cases this leads to water and nitrate uptake from deeper soil layers. There are also reports of gypsum improving physical properties of acid subsoils. Several experiments show positive effects of gypsum in the increase of yields. However, in some cases a possible effect of sulphur as a nutrient makes it impossible to isolate the effect of gypsum as a subsoil amendment. There are still no criteria available for when and how much gypsum to apply on acid soils. Care should be taken to avoid leaching losses of magnesium and potassium. MenosThis is a review on the use of gypsum as a subsoil ameliorator. Gypsum is a byproduct of the phosphoric acid production that is being recommended as subsoil amendment, aiming to improve deep rooting of crops. However, there is still controversy about its use for this purpose. Large areas of brazilian soils have acid subsoils, with low calcium and high aluminum contents, conditions that constitute chemical bariers for root penetration. The harmful effect of aluminm on root development is well known. Furthermore, the presence of calcium in the root envrironment is essential since this element is not translocated from upper to other parts of the plants. Gypsum, or calcium sulfate, is a soluble salt that, unlike limestone, penetrtes into the subsoil. The most direct effect is an increase in calcium, which provides a decrease of aluminum saturation by a dilution effect. However, several papers report an effect of gypsum in reducing exchangeable aluminum. Possible rasons for this are discussed. Studies in soil solutions and nutrient solutions containing aluminum have shown that aluminum activities present negative relations with root development. On the other hand, gypsum reduces aluminum activity and as such improves root development. Field trials have shown the effect of surface applied gypsum in deepening the roots of cultivated plants in acid subsoils. In some cases this leads to water and nitrate uptake from deeper soil layers. There are also reports of gypsum improving physi... Mostrar Tudo |
Palavras-Chave: |
Adubacao mineral; Agrícola; Ambiente radicular; ANDA; Chemical; Chemistry propriety; Composição; Correcao; Correção de solos; Corretivos agrícolas; Fertilizantes; Fertilization; Gesso agricola; Improvement; Melhoria; Mineral fertilization; Plant; Propriedade quimica; Propriedades quimicas; Relacao; Relation; Root; Rooting amelioration; Soil physicochemical properties; Solos; Solos ácidos; Subsoils; Substrate; Uso; Uso na agricultura; Vegetal nutrition. |
Thesagro: |
Acidez; Adsorção; Adubação; Adubo; Agricultura; Gesso; Íon; Lixiviação; Melhoramento; Nitrogênio; Nutrição Vegetal; Pesquisa; Planta; Química; Raiz; Sistema Radicular; Solo; Subsolo. |
Thesaurus Nal: |
acidity; agriculture; gypsum; nutrition; soil. |
Categoria do assunto: |
-- P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 03803nam a2200769 a 4500 001 1688853 005 2015-03-26 008 1988 bl uuuu 00u1 u #d 100 1 $aRAIJ, B. van. 245 $aGesso agricola na melhoria do ambiente radicular no subsolo. 260 $aSão Paulo: Associação Nacional para Difusao de Adubos e Corretivos Agrícolas$c1988 300 $a88 p. 520 $aThis is a review on the use of gypsum as a subsoil ameliorator. Gypsum is a byproduct of the phosphoric acid production that is being recommended as subsoil amendment, aiming to improve deep rooting of crops. However, there is still controversy about its use for this purpose. Large areas of brazilian soils have acid subsoils, with low calcium and high aluminum contents, conditions that constitute chemical bariers for root penetration. The harmful effect of aluminm on root development is well known. Furthermore, the presence of calcium in the root envrironment is essential since this element is not translocated from upper to other parts of the plants. Gypsum, or calcium sulfate, is a soluble salt that, unlike limestone, penetrtes into the subsoil. The most direct effect is an increase in calcium, which provides a decrease of aluminum saturation by a dilution effect. However, several papers report an effect of gypsum in reducing exchangeable aluminum. Possible rasons for this are discussed. Studies in soil solutions and nutrient solutions containing aluminum have shown that aluminum activities present negative relations with root development. On the other hand, gypsum reduces aluminum activity and as such improves root development. Field trials have shown the effect of surface applied gypsum in deepening the roots of cultivated plants in acid subsoils. In some cases this leads to water and nitrate uptake from deeper soil layers. There are also reports of gypsum improving physical properties of acid subsoils. Several experiments show positive effects of gypsum in the increase of yields. However, in some cases a possible effect of sulphur as a nutrient makes it impossible to isolate the effect of gypsum as a subsoil amendment. There are still no criteria available for when and how much gypsum to apply on acid soils. Care should be taken to avoid leaching losses of magnesium and potassium. 650 $aacidity 650 $aagriculture 650 $agypsum 650 $anutrition 650 $asoil 650 $aAcidez 650 $aAdsorção 650 $aAdubação 650 $aAdubo 650 $aAgricultura 650 $aGesso 650 $aÍon 650 $aLixiviação 650 $aMelhoramento 650 $aNitrogênio 650 $aNutrição Vegetal 650 $aPesquisa 650 $aPlanta 650 $aQuímica 650 $aRaiz 650 $aSistema Radicular 650 $aSolo 650 $aSubsolo 653 $aAdubacao mineral 653 $aAgrícola 653 $aAmbiente radicular 653 $aANDA 653 $aChemical 653 $aChemistry propriety 653 $aComposição 653 $aCorrecao 653 $aCorreção de solos 653 $aCorretivos agrícolas 653 $aFertilizantes 653 $aFertilization 653 $aGesso agricola 653 $aImprovement 653 $aMelhoria 653 $aMineral fertilization 653 $aPlant 653 $aPropriedade quimica 653 $aPropriedades quimicas 653 $aRelacao 653 $aRelation 653 $aRoot 653 $aRooting amelioration 653 $aSoil physicochemical properties 653 $aSolos 653 $aSolos ácidos 653 $aSubsoils 653 $aSubstrate 653 $aUso 653 $aUso na agricultura 653 $aVegetal nutrition
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Registro original: |
Embrapa Roraima (CPAF-RR) |
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Registros recuperados : 29 | |
2. | | NACHTIGALL, G. R.; RAIJ, B. van. Análise e interpretação do potássio no solo. In: SIMPÓSIO SOBRE POTÁSSIO NA AGRICULTURA BRASILEIRA, 2., 2004, São Pedro, SP. Potássio na agricultura brasileira: anais.. Piracicaba: Associação Brasileira para Pesquisa da Potassa e do Fosfato, 2005. p. 93-118.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Uva e Vinho. |
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13. | | BOEIRA, R. C.; RAIJ, B. van; SILVA, A. de S.; BETTANIN, V. C. Extração simultânea de alumínio, cálcio, magnésio, potássio e sódio do solo com solução de cloreto de amônio. Revista Brasileira de Ciência do Solo, Viçosa, MG, v.28, n. 5, p. 929-936, 2004.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Meio Ambiente. |
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15. | | QUAGGIO, J. A.; SOARES, N. B.; FURLANI, P. R.; RAIJ, B. van; PIZA. Manga. In: RAIJ, B. van; CANTARELLA, H.; QUAGGIO, J.A.; FURLANI, A.M.C. (Ed.). Recomendacoes de adubacao e calagem para o estado de Sao Paulo. 2. ed. Campinas: Instituto Agronomico, 1996. p. 146-147. (IAC. Boletim Tecnico, 100).Biblioteca(s): Embrapa Cerrados. |
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18. | | MOTTA, P. E. F. da; CURI, N.; SIQUEIRA, J. O.; RAIJ, B. van; FURTINI NETO, A. E.; LIMA, J. M. Adsorção e formas de fósforo em Latossolos: influência da mineralogia e histórico de uso. Revista Brasileira de Ciência do Solo, v. 26, n. 2, p. 349-359, 2002.Tipo: Artigo em Periódico Indexado |
Biblioteca(s): Embrapa Solos. |
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20. | | REIN, T. A.; FEITOSA, C. T.; GOEDERT, W. J.; RAIJ, B. van; SOUSA, D. M. G. de; ALBUQUERQUE, P. C. W. de; COSTA, F. G. M. Avaliacao agronomica do concentrado fosfatico de Patos de Minas tratado com bissulfato de amonio. Revista Brasileira de Ciencia do Solo, v.12, p.171-177, 1988.Biblioteca(s): Embrapa Cerrados. |
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Registros recuperados : 29 | |
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Nenhum registro encontrado para a expressão de busca informada. |
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