CONCENTRAÇÕES DE AIB (ácido indolbutírico) E BAP (6-benzilaminopurina) NA ESTAQUIA DE JAMBOLEIRO(Syzygium cumini(L.) Skeels)

Abstract

The aim of the study was to test different concentrations of indole-3-butyric acid and Benzylaminopurine in the jambolanpropagation by cuttings. The woody cuttings were obtained from plants approximately 15 years old and standardized with 12 cm in length, approximately 1.0 cm in diameter and two superficial lesions at the basal part, on opposite sides, with a portion of thebark being removed with about 0.5 cm wide by 2.5 cm in length, with apex cut in diagonal. The experimental design was completely randomized with factorial arrangement 3 × 3 *Indole-3-butyric acid (IBA) × Benzylaminopurine (BAP)+, with 4 replications, considering the use of 20 cuttingsper plot. The IBAconcentrations used were 0, 5000 and 10.000mg L-1and BAP 0, 250 and 500 mg L-1. The applications of the solutions were by immersion of 10 seconds in the base of the cuttings and conditioned in sand bed. After 120 days the characteristics of rooting and cuttings with calluses, number and length of primary shoots, number and length of roots were analyzed. The rooting percentage presented the highest result using 5,000 mg L-1of indole-3-butyric acid. However,the use of 10.000mg L-1of IBA provided a lower percentage of rooting, besides a higher number of dead cuttings. The use of Benzylaminopurine was not satisfactory for the rooting of jambolancuttings, since it did not provide increase in the rooting, thenumber of roots and the average size of the roots. The use of up to 5000 mg L-1of IBA without application of BAP was the most suitable for propagation of jambolanby cutting.