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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
24/01/1996 |
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Data da última atualização: |
24/01/1996 |
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Autoria: |
LINHARES, L. F. de T. L. |
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Título: |
Microbial synthesis in relation to soil humus formation. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Riverside: University of California, 1977. |
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Páginas: |
114p. |
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Série: |
Tese de Doutorado. |
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Idioma: |
Inglês |
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Notas: |
Orientada por: James P. Martin. |
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Conteúdo: |
Soil organic matter consists of plant, animal and microbial residues, fresh and at all stages of decomposition, and the relatively resistant, dark brown to black humus. Although constituting only about 1 to 10% of most agricultural soils, this organic fraction has been, since the dawn of history, a key to soil fertility and productivity. About two centuries have been devoted to studies of the nature, origin and properties of humus, but progress has been slow. This has not been due to failure in making use of advanced technology, but to the inherent complexity of humic polymers. Humus constitutes about 85% or more of soil organic matter. It is a natural product of the soil environment and is formed during the biological decomposition of organic residues. Generally about 15 to 30% of the original residue carbon remains in the soil after one year. A small part is in the more resistant cell structures of the soil organisms, but the major portion is present in new humus. Humus, however, does not usually accumulate in the soil under natural conditions, as the annual additions are balanced by the losses. This process confers to humus a state of dynamic equilibrium which maintains a constant amount of organic matter in a particular soil under a given set of environmental conditions. Based on differences in solubility in alkali and acid, humus can be separated into three main fractions: humic acids, fulvic acids and humins. The humins are not soluble in dilute alkali (0.1 to 0.5 N NaOH), the humic acids are soluble in ... MenosSoil organic matter consists of plant, animal and microbial residues, fresh and at all stages of decomposition, and the relatively resistant, dark brown to black humus. Although constituting only about 1 to 10% of most agricultural soils, this organic fraction has been, since the dawn of history, a key to soil fertility and productivity. About two centuries have been devoted to studies of the nature, origin and properties of humus, but progress has been slow. This has not been due to failure in making use of advanced technology, but to the inherent complexity of humic polymers. Humus constitutes about 85% or more of soil organic matter. It is a natural product of the soil environment and is formed during the biological decomposition of organic residues. Generally about 15 to 30% of the original residue carbon remains in the soil after one year. A small part is in the more resistant cell structures of the soil organisms, but the major portion is present in new humus. Humus, however, does not usually accumulate in the soil under natural conditions, as the annual additions are balanced by the losses. This process confers to humus a state of dynamic equilibrium which maintains a constant amount of organic matter in a particular soil under a given set of environmental conditions. Based on differences in solubility in alkali and acid, humus can be separated into three main fractions: humic acids, fulvic acids and humins. The humins are not soluble in dilute alkali (0.1 to 0.5 N Na... Mostrar Tudo |
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Palavras-Chave: |
Fungis; Fungos; Organic manure. |
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Thesagro: |
Adubo Orgânico; Húmus; Solo. |
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Thesaurus Nal: |
soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02128nam a2200229 a 4500
001 1621484
005 1996-01-24
008 1977 bl uuuu m 00u1 u #d
100 1 $aLINHARES, L. F. de T. L.
245 $aMicrobial synthesis in relation to soil humus formation.
260 $aRiverside: University of California$c1977
300 $a114p.
490 $aTese de Doutorado.
500 $aOrientada por: James P. Martin.
520 $aSoil organic matter consists of plant, animal and microbial residues, fresh and at all stages of decomposition, and the relatively resistant, dark brown to black humus. Although constituting only about 1 to 10% of most agricultural soils, this organic fraction has been, since the dawn of history, a key to soil fertility and productivity. About two centuries have been devoted to studies of the nature, origin and properties of humus, but progress has been slow. This has not been due to failure in making use of advanced technology, but to the inherent complexity of humic polymers. Humus constitutes about 85% or more of soil organic matter. It is a natural product of the soil environment and is formed during the biological decomposition of organic residues. Generally about 15 to 30% of the original residue carbon remains in the soil after one year. A small part is in the more resistant cell structures of the soil organisms, but the major portion is present in new humus. Humus, however, does not usually accumulate in the soil under natural conditions, as the annual additions are balanced by the losses. This process confers to humus a state of dynamic equilibrium which maintains a constant amount of organic matter in a particular soil under a given set of environmental conditions. Based on differences in solubility in alkali and acid, humus can be separated into three main fractions: humic acids, fulvic acids and humins. The humins are not soluble in dilute alkali (0.1 to 0.5 N NaOH), the humic acids are soluble in ...
650 $asoil
650 $aAdubo Orgânico
650 $aHúmus
650 $aSolo
653 $aFungis
653 $aFungos
653 $aOrganic manure
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| Registros recuperados : 12 | |
| 10. |  | LINHARES, L. F.; SIQUEIRA, K. B.; ALMEIDA, M. F. de; HOTT, M. C.; FONSECA, L. d'A. M. Acordos de livre comércio: uma tendência mundial. Boletim CBLeite, Juiz de Fora, v. 5, n. 13, p. 73-78, 2011.| Tipo: Artigo de Divulgação na Mídia |
| Biblioteca(s): Embrapa Gado de Leite. |
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| 11. | | FRAZÃO, J. J.; BENITES, V. de M.; DAMIN, V.; TEIXEIRA, P. C.; MACEDO, G. M.; LINHARES, L. F. Agronomic efficiency of granulated organomineral fertilizers based on poultry litter and phosphates. In: WORLD FERTILIZER CONGRESS OF CIEC, 16., 2014, Rio de Janeiro. Technological innovation for a sustainable tropical agriculture: proceedings. Rio de Janeiro: CIEC, 2014. p. 259-261.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 12. | | LINHARES, L. F.; PONTES JÚNIOR, V. de A.; WENDLAND, A.; SOUZA, T. L. P. O. de; FARIA, L. C. de; PEREIRA, H. S.; MELO, L. C. Interação com ambientes e estabilidade de genótipos para qualidade de grãos em feijoeiro-comum em Goiás e Distrito Federal. In: SEMINÁRIO JOVENS TALENTOS, 8., 2014, Santo Antônio de Goiás. Coletânea dos resumos apresentados. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2014. p. 69. (Embrapa Arroz e Feijão. Documentos, 306).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| Registros recuperados : 12 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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