Indolbutyric Acid (IBA) in the african mahogany (Khaya grandifoliola C. DC.) cuttings and mini-cuttings development

Abstract

The current expansion of the forest sector in the Cerrado (Brazilian Savannah), especially of the species of genus Khaya sp. (African Mahogany), requires several silvicultural and technical studies of various natures. Seed and clonal propagation enable noble and vigorous seedlings, which will future compose commercial plantations aiming timber production. The species Khaya grandifoliola C. DC is considered of distinct wood characteristics and with great economic potential. The objective of this work was to evaluate the effect of different indolbultyric acid (IBA) concentrations – between 0 and 12 g.L-1– on the rooting of K. grandifoliola cuttings and mini-cuttings. The experiment was carried out at the "Mudas Nobres" private nursery, located in Goiânia (Goiás State, Brazil). The experiment was conducted in a completely randomized design in a 5 × 2 factorial scheme. Each treatment consisted of four replications with 20 cuttings (clonal origin) or mini-cuttings (seed origin) per repetition. Models were also applied to estimate the number of shoots in clonal cuttings, according to the data observed in seed mini-cuttings. The results indicate that IBA has the opposite effect on the two evaluated types of propagule origin, being more suitable for seed mini-cuttings (should apply 8 g.L-1of IBA) and less for clonal cuttings (should not apply IBA). If a standard application must be recommended (to cuttings either mini-cuttings), the most appropriate concentration is 6 g.L-1of IBA.

Infrared Thermal Profiles in Silvopastoral and Full-Sun Pastures in the Eastern Amazon, Brazil

“…In Brazil, this species was erroneously called Khaya ivorensis [35]; however, recognizing this error, researchers corrected it to reflect the proper name, Khaya grandifoliola [36]. Very commonly, however, its seeds and seedlings are still marketed as K. ivorensis, but with the continual development of research and scientific publications, it is expected that soon the correct nomenclature will be exclusively employed [37].…”

Influência do ácido indolbutírico no enraizamento de miniestacas caulinar e foliar de mogno-africano (<i>Khaya grandifoliola</i> C. DC.)

“…No entanto, rotineiramente suas sementes e mudas ainda são comercializadas como Khaya ivorensis. Por meio do desenvolvimento de trabalhos e publicações científicas, é esperado que em breve a nomenclatura correta seja habitualmente utilizada (SILVA et al, 2020).…”