Efeito do ácido indolbutírico (AIB) no enraizamento de estacas herbáceas e lenhosas de serigueleira (Spondias purpurea L.)

Abstract
The serigueleira is a fruit that is little explored commercially in several regions of Brazil, having little work regarding the feasibility of seedling production by cuttings with and without plant regulators. Due to this lack of technical information, the present work has as main objective to evaluate the rooting of herbaceous and woody cuttings of the serigueleira (Spondias purpurea L.) treated with indolbutyric acid (AIB). Herbaceous and woody cuttings were obtained from a matrix plant with approximately fifteen years of age, with 12 cm in length the cuttings were cut in bevel and then immersed in a commercial fungicide solution of 0.2%. The cuttings were treated with AIB in the form of talc, 0, 1%, 2%, 3% and 5%, planted in beds containing vermiculite, rice straw and construction sand. The experimental design used was completely randomized, with four replications, each plot consisting of 10 cuttings. Cuttings were evaluated over 90 days, recording the following parameters: percentage of rooted cuttings, percentage of live cuttings and calluses, number of cuttings with buds, average length of the largest root and number of roots. Among the results obtained, the best concentration was 3% of 5% IBA in the rooting of herbaceous cuttings (17,25% in 17,75%) and 5% of IBA in the rooting of woody cuttings (22,25% e 22,55%). Herbaceous cuttings showed higher percentages of cuttings with calluses when compared to woody cuttings.