Indolbutyric acid in the vegetative propagation of cajarana plants (Spondias sp.)
DOI:
https://doi.org/10.5433/1679-0359.2012v33n6Supl1p2727Keywords:
Cutting, Growth regulator, IBA.Abstract
The objective of this study was to evaluate the vegetative propagation of cuttings semi-herbaceous of “cajaraneira” (Spondias sp.) treated with indolbutyric acid at different concentrations. Cuttings of 20 cm, submitted to the application of six concentrations of indolbutyric acid – IBA (0, 500, 1000, 3000, 6000 and 9000 ppm). The experimental design was randomized blocks, being used with four replications and 12 cuttings per experimental unit, being evaluated 60 days after planting. We evaluated the number of buds, length of bud, leaf number, the number of leaflets, the length of the root system, the percentage of rooting, root number per cutting, leaf dry weight, dry weight sprouting, the dry mass of root system and the relationship between the dry mass of shoot and root dry mass. The increase in IBA concentration promoted a quadratic polynomial for the variables analyzed; except for the relationship between the dry mass of shoots and dry weight of roots, which was observed a decreasing effect with increased doses. For the production of vigorous seedlings cajaraneira by cuttings can be used, on average, a concentration of 5232 ppm IBA, mixed in pharmaceutical talc powder.
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