Enraizamento de estacas dos porta-enxertos Araticum-de-Terra-Fria (Rollinia sp.) e Araticum-Mirim (Rollinia emarginata Schltdl.) para anonáceas

Abstract

The objective of the present research to verify the was influence of the indol–3–butyric acid (IBA) on rooting of cutting of araticum–de–terra–fria and araticum–mirim. Semi hardwood cuttings standardized with 15 cm of length, one pair of leaves and diameter of 0,4–0,5 cm, were treated with different concentrations of IBA (0, 1000, 2000 and 3000 mg.L–1) for five seconds and later on placed in trays of polypropylene of 72 cells (120 cm3), containing as substrate vermiculita, being transferred to a camera of intermittent nebulization. After 60 days, the alive cutting, callous, rooting and sprouting percentages, and also, the number of rootses emitted by cutting were evaluated. The araticum–de–terra–fria promoted better results for all the analyzed variables, in comparison to araticum–mirim. IBA just influenced the callous, rooting and sprouting percentage for the araticum–de–terra–fria. Growing concentrations of IBA increased the callous and rooting percentage to the values of 89 and 56.4%, respectively, but on the other hand, they lineally decreased sprouting percentage.