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| OLIVEIRA,A.P.P.; PEREIRA,S.R.; CÂNDIDO,A.C.S.; LAURA,V.A.; PERES,M.T.L.P.. |
| ABSTRACT Tree establishment in pasture areas can be inhibited, at least in part, by exotic grasses allelopathy and this can represent an important limitation by changing the patterns of both germination and seedling growth of tree species. This study aims to evaluate the allelopathic potential of Urochloa brizantha and U. decumbens on germination, growth and metabolism of Guazuma ulmifolia seedlings. We performed bioassays evaluating the effect of the crude ethanol extract and semipurified fractions (hexane fraction, ethyl acetate fraction and ethanol-water fraction) of U. brizantha and U. decumbens using completely randomized design, with four concentrations (0, 250, 500, 1,000 mg L-1) and four replications. The variables analyzed were germination... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Guazuma ulmifolia; Interference competition; Exotic grasses; Direct sowing; Restoration; Urochloa. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400639 |
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| PEREIRA,S.R.; FONSECA,D.R.; MATIAS,R.; CORRÊA,B.O.; PEDRINHO,D.R.. |
| ABSTRACT: Considering the possibility of a intercropping between exotic and native wood species for Legal Reserve areas restoration, information is needed about the possible interactions (positive or negative) between the involved species. The aim of this study was to determine the allelochemicals classes of aqueous extracts from dried and fresh leaves of torelliodora eucalyptus, as well as to evaluate the allelopathic potential of these extracts in the germination and initial growth of Guazuma ulmifola, a native species from Cerrado. To obtain the aqueous extracts at the concentrations of 25 mg mL-1, 50 mg mL-1, 100 mg mL-1 and 200 mg mL-1, the fresh and dried leaves of the eucalyptus were separately subjected to turbolize, followed by an ultrasound bath... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelochemicals; Legal Reserve restoration; Guazuma ulmifolia; Exotic species. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100349 |
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