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| Palacios,Sofia; Casasnovas,Francisco; Ramirez,María L.; Reynoso,María. M.; Torres,Adriana M.. |
| Studies were conducted to determine the effect of osmotic and matric stress on germination and growth of two Fusarium solani strains, the etiological agent responsible of peanut brown root rot. Both strains had similar osmotic and matric potential ranges that allowed growth, being the latter one narrower. F. solani showed the ability to grow down to -14 MPa at 25 °C in non-ionic modified osmotic medium, while under matric stress this was limited to -8.4 MPa at 25 °C. However, both strains were seen to respond differently to decreasing osmotic and matric potentials, during early stages of germination. One strain (RC 338) showed to be more sensitive to matric than osmotic (non ionic) and the other one (RC 386) showed to be more sensitive to osmotic than... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fusarium solani; Germination; Growth; Matric potential; Osmotic potential; Peanut brown root rot; Soilborne pathogen. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300046 |
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| SILVA, E. M. da; AZEVEDO, J. A. de. |
| O periodo de centrifugacao, necessario ao equilibrio da agua no solo, e fator preponderante da precisao da curva de retencao de agua. O estudo foi desenvovido com o objetivo de avaliar o periodo de centrifugacao na curva de retencao de agua, em cinco tipos de solo, representativos do Bioma Cerrado. as curvas de rtencao foram modeladas, por regressao não-linear, e a soma dos erros residuais do ajuste resultante foi utilizada para avaliação das diferencas estatisticas entre elas, pelo teste da razao de verossimilhanca. As curvas de retencao ajustadas para cada tipo de solo foram agrupadas em familias de curvas para facilitar a visualizacao das diferencas observadas. Os resultados mostraram claramente, que o periodo de centrifugacao afetou mais a umidade... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: ECOSOL140; Potencial matricial; Modelagem da curva de retencao; Available soil-water; Matric potential; Soil-water retention modeling; Solo: Fisica e Fisico-hidrica.; Centrifugação; Cerrado; Disponibilidade de Água; Física do Solo; Solo.. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567102 |
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| Moreira,Wagner Henrique; Tormena,Cássio Antônio; Betioli Junior,Edner; Figueiredo,Getulio Coutinho; Silva,Álvaro Pires da; Giarola,Neyde Fabíola Balarezo. |
| The least limiting water range (LLWR) has been used as an indicator of soil physical quality as it represents, in a single parameter, the soil physical properties directly linked to plant growth, with the exception of temperature. The usual procedure for obtaining the LLWR involves determination of the water retention curve (WRC) and the soil resistance to penetration curve (SRC) in soil samples with undisturbed structure in the laboratory. Determination of the WRC and SRC using field measurements (in situ ) is preferable, but requires appropriate instrumentation. The objective of this study was to determine the LLWR from the data collected for determination of WRC and SRC in situ using portable electronic instruments, and to compare those determinations... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Water content; Instrumentation; Critical bulk density; Soil physical quality; Matric potential. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600012 |
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| SAMPAIO,ANTONIO HÉLDER RODRIGUES; COELHO FILHO,MAURÍCIO ANTONIO; SOUZA,LAERCIO DUARTE; BRITO,RALPH BRUNO FRANÇA; SILVA,ROBERVAL OLIVEIRA DA. |
| ABSTRACT This study aimed to evaluate, under field conditions, different combinations between ‘Pera’ sweet orange and eight rootstocks: ‘Rangpur’ lime (RL), ‘Volkamer’ lemon (VL), ‘Cleopatra’ mandarin (CM), ‘Sunki Maravilha’ mandarin (SMM), ‘Indio’ and ‘Riverside’ citrandarins, and VL x RL (‘Rangpur’ lime)-010 and TH-051 hybrids. The soil water matric potential (?m) was characterized for all scion-rootstock combinations at distance of 1.0m from the trunk at the plant row direction and depths of 0.25 m, 0.50 m 0.90 m in the dry and wet seasons. For two years, fruit production parameters and fruit quality were assessed. Differences of Ym among scion-rootstock combinations were observed during the dry season (p=0.05). The lowest Ym values for RL and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus; Matric potential; Drought tolerance; Rootstock. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000301001 |
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