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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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| 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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| Pereira,Tiago de A.; Souto,Lauter S.; Sá,Francisco V. da S.; Dutra Filho,João A.; Souza,Tarso M. A. de; Paiva,Emanoela P. de. |
| ABSTRACT The objective was to study the influence of potassium sulfate doses applied to the soil on the growth and production of green dwarf coconut (Cocos nucifera L.) grown in saline-sodic soil. The experiment was conducted from January 2013 to January 2016, in a commercial plantation in the Sector 7 of the ‘Várzeas de Sousa’ Irrigation District, PB, Brazil, in saline-sodic Ebanic Vertisol. The experiment used coconut plants belonging to green dwarf variety, arranged in a 7.0 x 7.0 m rectangular shape, starting the third year in the production stabilization stage. The adopted experimental design was randomized blocks, evaluating five doses of potassium sulfate (K2SO4) (0, 0.52, 1.04, 2.08 and 4.16 kg plant-1 year-1), with four replicates of four plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cocos nucifera L.; Potassium fertilization; Soil sodicity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000700454 |
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