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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
29/08/2002 |
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Data da última atualização: |
15/05/2018 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
LOPES, P. R. C.; GISBERT, J. M.; SOUZA, L. D.; GOMEZ, L. D.; ALMEIDA, O. A. |
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Afiliação: |
PAULO ROBERTO COELHO LOPES, CPATSA. |
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Título: |
Effect of levels of polymaleic acid on the structural stability of saline soils. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONGRESS MAN AND SOIL AT THE THIRD MILLENIUM, 3., 2000, Valencia. Proceedings... Valencia : Geoforma Ediciones, 2002. |
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Páginas: |
p. 1055-1064. |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of levels of polymaleic acid was studied on the structural stability of two saline soils exposed to intensive cultivation. Soil samples with undisturbed structure were collected and placed in containers where levels polymaleic acid (0, 10, 20 and 30L/ha) were applied diluted water, in order to raise the moisture up to field capacity. One week later, controlled drip irrigation was applied using a volume corresponding to the pluviometric precipitation of the areas where the samples were collected. The washed soil samples were taken from the containers with the objective of lowering the moisture and separating the aggregates, considering those which passed through a 4 mm sieve and were retained in a 2 mm sieve. From each soil type, four bags of aggregates weighting 1 kg were taken, received a second application of the same levels of the polymer diluted in the irrigation water, adjusting the moisture of the samples of aggregates to 80% of the field capacity. The plastic bags with the humid samples were weighted and closed to keep the moisture uniform. Three subsamples from each bag were taken every 30 days to determine the weighed mean diameter (WMD) of the aggregates up to 150 days. After washing the soil with distilled water, WMD of the aggregates was reduced in the two soil types, in different proportions. The highest levels caused a lower reduction on the stability grade, showing the role of the polymer on protection of the aggregates against disintegration. After 30 days of the second application of the polymer on washed aggregates, WMD started to increase differently for all the treatments, showing is effect on increasing structural stability of the soils. MenosThe effect of levels of polymaleic acid was studied on the structural stability of two saline soils exposed to intensive cultivation. Soil samples with undisturbed structure were collected and placed in containers where levels polymaleic acid (0, 10, 20 and 30L/ha) were applied diluted water, in order to raise the moisture up to field capacity. One week later, controlled drip irrigation was applied using a volume corresponding to the pluviometric precipitation of the areas where the samples were collected. The washed soil samples were taken from the containers with the objective of lowering the moisture and separating the aggregates, considering those which passed through a 4 mm sieve and were retained in a 2 mm sieve. From each soil type, four bags of aggregates weighting 1 kg were taken, received a second application of the same levels of the polymer diluted in the irrigation water, adjusting the moisture of the samples of aggregates to 80% of the field capacity. The plastic bags with the humid samples were weighted and closed to keep the moisture uniform. Three subsamples from each bag were taken every 30 days to determine the weighed mean diameter (WMD) of the aggregates up to 150 days. After washing the soil with distilled water, WMD of the aggregates was reduced in the two soil types, in different proportions. The highest levels caused a lower reduction on the stability grade, showing the role of the polymer on protection of the aggregates against disintegration. After... Mostrar Tudo |
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Palavras-Chave: |
Aggregate; Chemicophysical properties; Dispersed clay; Soil conditioner. |
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Thesagro: |
Argila; Condicionador do Solo; Dispersão; Salinidade. |
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Thesaurus Nal: |
salinity. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/176861/1/Separata-01221.pdf
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Marc: |
LEADER 02539nam a2200277 a 4500
001 1132270
005 2018-05-15
008 2002 bl uuuu u00u1 u #d
100 1 $aLOPES, P. R. C.
245 $aEffect of levels of polymaleic acid on the structural stability of saline soils.
260 $aIn: INTERNATIONAL CONGRESS MAN AND SOIL AT THE THIRD MILLENIUM, 3., 2000, Valencia. Proceedings... Valencia : Geoforma Ediciones$c2002
300 $ap. 1055-1064.
520 $aThe effect of levels of polymaleic acid was studied on the structural stability of two saline soils exposed to intensive cultivation. Soil samples with undisturbed structure were collected and placed in containers where levels polymaleic acid (0, 10, 20 and 30L/ha) were applied diluted water, in order to raise the moisture up to field capacity. One week later, controlled drip irrigation was applied using a volume corresponding to the pluviometric precipitation of the areas where the samples were collected. The washed soil samples were taken from the containers with the objective of lowering the moisture and separating the aggregates, considering those which passed through a 4 mm sieve and were retained in a 2 mm sieve. From each soil type, four bags of aggregates weighting 1 kg were taken, received a second application of the same levels of the polymer diluted in the irrigation water, adjusting the moisture of the samples of aggregates to 80% of the field capacity. The plastic bags with the humid samples were weighted and closed to keep the moisture uniform. Three subsamples from each bag were taken every 30 days to determine the weighed mean diameter (WMD) of the aggregates up to 150 days. After washing the soil with distilled water, WMD of the aggregates was reduced in the two soil types, in different proportions. The highest levels caused a lower reduction on the stability grade, showing the role of the polymer on protection of the aggregates against disintegration. After 30 days of the second application of the polymer on washed aggregates, WMD started to increase differently for all the treatments, showing is effect on increasing structural stability of the soils.
650 $asalinity
650 $aArgila
650 $aCondicionador do Solo
650 $aDispersão
650 $aSalinidade
653 $aAggregate
653 $aChemicophysical properties
653 $aDispersed clay
653 $aSoil conditioner
700 1 $aGISBERT, J. M.
700 1 $aSOUZA, L. D.
700 1 $aGOMEZ, L. D.
700 1 $aALMEIDA, O. A.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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| Registros recuperados : 7 | |
| 3. |  | LOPES, P. R. C.; GISBERT, J. M.; GOMEZ, L. D.; OLIVEIRA, C. A. Efecto de dosis de polímero maleico en la estabilidad estructural de suelos salinos. In: CONGRESO LATINOAMERICANO DE LA CIENCIA DEL SUELO, 14.; CONGRESO DE LA SOCIEDAD AGRONOMICA DE CHILE, 50.; CONGRESO NACIONAL DE LA CIENCIA DEL SUELO, 9.,1999, Temuco, Chile. Resumenes... Temuco: Universidad de la Frontera, 1999. p. 643.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 5. | | GISBERT, J. M.; SOUZA, L.; GÓMEZ, L. D.; LOPES, P. R. C.; ALBÁÑEZ, S. Effects of the synthetic polymers aplication on the chemical properties of saline-alkali soil. In: FAZ, A.; ORTIZ, R.; MERMUT, A. R. (Ed.). Sustainable use and management of soils in arid and semiarid regions. [S.l.]: Quaderna Editorial, 2002. v. 2, p. 65-66.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Semiárido. |
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| 6. | | LOPES, P. R. C.; GISBERT, J. M.; GOMEZ, L. D.; SOUZA, L. D.; ALMEIDA, O. A. de. Evaluacion de dosis de acido polimaleico en la reduccion de los niveles de salinidad y sodicidad del suelo. Agricola Vergel, Valencia, v. 19,n. 217, p. 9-16, 2000.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - C |
| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 7 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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