Sobrenxertia direta em campo de brotações de bacurizeiro

Abstract

The bacurize trce (Platonia insignis Mart.) is a trcc, fruit and wood spccies, native to thc Amazon. For lhe Maranhão State conditions, tiic bacuri trec is considercd the most naturally occurring fruit trec in different rcgions of the State, vvith potential for exploration. Thc spccies lias a peculiar characterístic of emitting many shoots from a single individual. And it is difficult to propagate by seeds, not being suilable because the species is allogamous, presenting great genetic variability and a long juvenile period. This work aims to investigate tlie viability of direct overgrafting in the field, taking advantage of spontaneous shoots of native bacurry, aiming at enriching the population with selected matrices. The work was carried out in the municipality of Presidente Juscelino, together with a rural community. Two matrices of productive bacuri trees with good agronomic characteristics were selected - Selection 1 (Domingâo) and Selection 2 (Boa-Vista). Sixty shoots were used per bacuri selection, 30 grafted by Full Slit Carfage and 30 grafted by Simple English Carfage. The experiment was installed in a completely randomized design, with 4 treatments, represented by the combination of clones - Boa Vista and Domingâo x grafting types - GFC and GIS, with 5 replications, and each plot consisting of 6 individuais , totaling 120 grafted plants. The most promising combination of direct overgrafting in the field was the 'Domingâo' selection using the full slit fork method, with a set rate and viability of 46.6%; the diametric development of the grafts exhibited increments in the incompatibility index over time, indicating that the combinations maintaín high vigor