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vol.24 número2ESTIMACIÓN DE LA COMPETITIVIDAD DE LOS PAÍSES EXPORTADORES DE FRUTA DEL HEMISFERIO SUR A PARTIR DEL ÍNDICE DE COMPETITIVIDAD PARA EL CRECIMIENTO EN EL PERÍODO 2001-2004SIEMBRA CON LABRANZA TRADICIONAL Y CERO LABRANZA, MEDIANTE LA ADAPTACIÓN DE UNA SEMBRADORA DE CEREALES Y DOS DISTANCIAS ENTRE HILERAS EN CULTIVARES DE FREJOL PARA VERDE Y SECO índice de autoresíndice de assuntospesquisa de artigos
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Idesia (Arica)

versão On-line ISSN 0718-3429

Resumo

LAYNEZ-GARSABALL, José A  e  MENDEZ-NATERA, Jesús Rafael. EFFECTS OF FOLIAGE WATER EXTRACTS OF PURPLE NUTSEDGE (CYPERUS ROTUNDUS L.) ON SED GERMINATION AND SEDLING GROWTH OF SESAME (SESAMUM INDICUM L.) CV. ARAPATOL S-15. Idesia [online]. 2006, vol.24, n.2, pp.61-75. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292006000200008.

The objective of this experiment was to determine the effects of foliage water extracts of purple nutsedge (Cyperus rotundus L.) on seed germination and seedling growth of sesame (Sesamum indicum L.) cv. Arapatol S-15. An extract was prepared with nutsedge foliage of 15 days at 15% w/v. For the dilution, extracts of 0.0, 0.5, 1.0, 1.5 y 2.0% w/v were prepared, pH and electric conductivity (S.cm-1) were determined. Distilled water was uses as a control. Twenty five seeds were sowed in a double layer of absorbent paper on trays, covered with two leaves of absorbent paper. They were watered three times per day using foliage extracts. A randomized complete block design was used with the five extract concentrations (as above) and four replications. The traits were determined twelve days after sowing. An analysis of variance and regression were applied. The pH diminished and the electrical conductivity increased when the extract concentration was increased. The germination was stimulated by extracts concentrations of 0.5 and 1.0% and it was inhibited at 1.5 and 2.0%. Seedling height, radicle length, shoot dry weight, radicle dry weight and the relationship between dry shoot weight/dry radicle weight decreased with an increase to the extract concentrations. Relationship between seedling height/radicle length increment up to the concentration of up to 1.0% and it descended at 1.5 and 2.0%.

Palavras-chave : Cyperus rotundus; water extracts; Sesamum indicum; alellopathy.

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