Effect of the aqueous tubers of Cyperus rotundus L. extract for propagation by cuttings Jatropha curcas L.

Abstract

This study was conducted at UNESP of Single Island-Sao Paulo (Brazil), in a greenhouse under controlled conditions. The aim was to study the induction of rooting pinhao-manso Jatropha curcas L. by applying different concentrations of aqueous extracts of tiririca Cyperus rotundus L. compared with the application of synthetic auxin (IBA). The experiment was installed on 15/10/2011, using completely randomized experimental design in 4 treatments (25 g nutsedge tubers by 0.5 L, 1.0 L and 1.5 L of distilled water. And AIB powder, at 1000 ppm) and control with three replicates per treatment and 10 cuttings per replication, totaling 150 cuttings. The pinhao-manso cuttings were standardized with 10 cm long and 6-9 mm in diameter. Subsequently they were immersed in sedge extracts for 30 minutes and applied synthetic auxin, AIB powder at the base of the cuttings. The plantation was in bib containing substrate. 60 days after the installation of the experiment were evaluated the percentage of rooting, number of roots per cutting, length of roots emitted by cuttings, and fresh weight and dry roots. It was concluded that the aqueous extract of sedge dilution 25g for 1.5L of distilled water showed higher percentage of rooted cuttings, but IBA 1000 ppm produced roots in greater numbers and more vigorous.