Ácido indolbutírico e incisão no enraizamento de estacas de Maytenus ilicifolia Mart. ex Reissek

Abstract

Espinheira-santa (Maytenus ilicifolia mart.- Celastraceae) is a species native to South America, occurring in southern Brazil, Paraguay, Uruguay and eastern Argentina. The objective of the present study was to study the effects of the application of different concentrations of IBA and incisions in the base of the cuttings on the rooting of cuttings of espinheira-santa to enable the production of seedlings. The experiment was conducted in the community of São Cristóvão between the months of July 2018 and November 2018. The experiment was conducted from planting located at UNEPE horticulture in the experimental area of the university. Stakes were collected from semilenous branches with a length of 10 cm, with incision at the base and without incision, maintaining a pair of leaves in the apical portion. Then, the bases of the minicuttings were immersed in alcoholic solutions (50%) with different concentrations of IBA (0.1000, 2000, 3000, mg L-1) for about ten seconds and then planted in 53 cm3 filled with vermiculite. The statistical design was completely randomized, with 4 replicates of 16 stakes per plot, with a factorial arrangement of 4 x 2 (four concentrations of IBA and two types of cutting, with and without incision), totaling 8 treatments. At 120 days after planting the following variables were evaluated: percentage of rooted cuttings, nonrooted cuttings, with shoots, calluses, dead, number and average length of roots formed by cutting (cm) and average number of shoots per cutting. The analysis of variance showed that there was no significant difference between the doses tested, but there was a difference between the incision and non-incision techniques, indicating that when incised, it assists in the rooting of the cuttings. It was concluded that the species did not respond to the doses of IBA applied and that the technique of incision at the base of the cuttings improved the rooting.