Enraizamento de estacas herbáceas da seleção 8501-1 de goiabeira submetidas a lesão na base e a concentrações de AIB

Abstract

This work aimed to evaluate the influence of different concentrations of indolebutiric acid (IBA) on the rooting potential of 0- cm long herbaceous cuttings of guava selection 850 - , submitted or not to basal lesions. The cuttings were prepared in two ways (with or without basal lesions) and submitted to four concentrations of IBA (0 mg L- , ,000 mg L- , ,000 mg L- and 3,000 mg L- ). After the lesions were made, the cuttings were placed to root in plastic boxes containing carbonized rice husk. The experiment was randomized with five replicates in 2 x 4 factorial arrangement, where each plot was composed by 0 cuttings. After 85 days, the following variables were evaluated: foliar retention (%); rooted cuttings (%); cutting survival rate (%); cuttings with callus but without roots (%); root number per cutting; root length per cutting and wet and dry root matter per cutting (g). There is no significant contrast amongst the IBA different concentrations related to the percentage of rooted cuttings, but there is a significant difference related to the root number per cutting and wet and dry root matter per cutting where the doses of ,000 and 3,000 mg L- showed the highest averages; the basal lesions do not bring improvements on the cutting rooting potential; the 3,000 mg L- IBA concentrations resulted in the largest number of roots per cutting.