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| Gloaguen,Thomas Vincent; Gonçalves,Roberta Alessandra Bruschi; Forti,Maria Cristina; Lucas,Yves; Montes,Célia Regina. |
| Irrigation with treated domestic sewage wastewater (TSE) is an agricultural practice to reduce water requirements of agroecossystems and the nutrient load impact on freshwaters, but adverse effects on soil chemical (salinization, sodification, etc.) and soil physical properties (alteration in soil porosity and hydraulic conductivity, etc.) have been reported. This study aimed to define some relationships among these changes in an Oxisol using multivariate analysis. Corn (Zea mays L.) and sunflower (Helianthus annuus L.) were grown for two years, irrigated with TSE. The following soil properties were determined: Ca2+; Mg2+; Na+; K+ and H + Al contents, cationic exchangeable capacity (CEC), sum of bases (SB), base saturation (V), texture (sand, silt and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil porosity; Soil sodicity; Factor analysis. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400038 |
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| Gloaguen,Thomas Vincent; Pereira,Francisco Adriano de Carvalho; Gonçalves,Roberta Alessandra Bruschi; Paz,Vital da Silva. |
| A composição química da solução do solo pode ser considerada indicadora da presença de nutrientes ou contaminantes no solo. Para analisar a variação dessa composição nos poros do solo, utilizou-se um sistema de extração sequencial da solução do solo em diferentes classes de diâmetro de poro. Colunas de PVC foram construídas e preenchidas com terra fina seca ao ar de um Cambissolo Háplico distrófico, e irrigadas com água destilada (T1), efluente de estação de tratamento de esgoto sanitário EETE (T2) e EETE + 1,2 g L-1 CaSO4 (T3), aplicando lâminas de 150 e 300 mm. Antes da irrigação e após cada lâmina, aplicaram-se na base de cada coluna os seguintes potenciais: 0, 13,3, 26,7, 40,0 e 53,3 kPa para extração e coleta da solução do solo nas faixas de poros: Ø... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Porosidade do solo; Efluente de estação de tratamento de esgoto; Gesso; Nitrato; Sodicidade. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500004 |
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| Gonçalves,Roberta Alessandra Bruschi; Gloaguen,Thomas Vincent; Folegatti,Marcos Vinicius; Libardi,Paulo Leonel; Lucas,Yves; Montes,Célia Regina. |
| Soil porosity, especially pore size distribution, is an important controlling factor for soil infiltration, hydraulic conductivity, and water retention. This study aimed to verify the effect of secondary-treated domestic wastewater (STW) on the porosity of a sandy loam Oxisol in the city of Lins, state of São Paulo, Brazil. The two-year experiment was divided into three plots: soil cultivated with corn and sunflower and irrigated with STW, soil cultivated and irrigated with sodic groundwater, and non-irrigated and non-cultivated soil (control). At the end of the experiment, undisturbed core samples were sampled from 0 to 2.0 m (8 depths). The water retention curves were obtained by tension plates and Richard's pressure plate apparatus, and the pore size... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sodic wastewater; Soil porosity; Clay dispersion; Soil sodicity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300011 |
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