Propagação vegetativa de Mogno Africano

Abstract

The increasing demand for wood and the exploitation of native forests endangers the extinction of high value plant specimens. Therefore, exotic species are being used, on the south hemisphere, in tropical and sub-tropical countries and especially in the Amazon Region with the African mahoganies. Along with this, there has been an increasing demand on methods of vegetative propagation of these species that guarantee the superior attributes of the stock plant. Thereby, the aim of this study was to test the efficiency of different indole-butyric acid (IBA) concentrations, cut of kind and substrate on cuttings of Khaya ivorensis and Khaya senegalensis in non-mist propagators and greenhouses and test different methods of grafting for vegetative propagation of African mahogany. In the cuttings experiments different auxin concentrations were tested as well as different immersion times, proveniences of the cuttings and types of cuttings. For the grafting, four methods were tested using African mahogany below the same species. The methods used were Saddle graft (SG), Side-veener graft (SV), Whip and tongue grafts (WT) and Patch budding (PB). It was possible to observe that there was a tendency to reach better results in rooting percentage and survival percentage using the concentration of 800 mg.L-1 of IBA in cuttings especially the apical leaf cuttings. The rooted cuttings grew with vigor and achieved 53 cm length. The grafting method with bests results was SV with 16,67% success and grafts developed vigorously reaching 27 cm in 30 days.