|
|
| Silva,Alexandre Christofaro; Canellas,Luciano Pasqualoto; Olivares,Fábio Lopes; Dobbss,Leonardo Barros; Aguiar,Natalia Oliveira; Frade,Daniele Ângela Rossinol; Rezende,Carlos Eduardo; Peres,Lázaro Eustáquio Pereira. |
| Peats are an important reserve of humified carbon in terrestrial ecosystems. The interest in the use of humic substances as plant growth promoters is continuously increasing. The objective of this study was to evaluate the bioactivity of alkaline soluble humic substances (HS), humic (HA) and fulvic acids (FA) isolated from peats with different decomposition stages of organic matter (sapric, fibric and hemic) in the Serra do Espinhaço Meridional, state of Minas Gerais. Dose-response curves were established for the number of lateral roots growing from the main plant axis of tomato seedlings. The bioactivity of HA was greatest (highest response in lateral roots at lowest concentration) while FA did not intensify root growth. Both HS and HA stimulated root... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physiological effects; Bioactivity. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500015 |
| |
