Abstract
Clonal propagation makes greater genetic gains in less time than using seed reproduction for forest species like C. quercifolius. The auxin – based phytoregulators such as Indol Butyric Acid (IBA) and he aqueous extract of Cyperus rotundus L. tubers have been used in plant cloning as rooting promoters an improvement in root quality. The aim of this work was to analyze the efficiency of the cloning technique by air layering in a Caatinga species, Cnidoscolus quercifolius, and replace with specifically to know the best season, the time requirements for rooting and the efficiency of the extract of C. rotundus and IBA. Thus, aqueous extracts of tubers of C. rotundus, at concentrations of 0.0% (Replace with absolute witness), 10%, 20%, 30% and 40% were also evaluate, also the AIB at the concentration of 6.0 g/L (witness 2). The results indicated that the best season for the cloning of Cnidoscolus quercifolius by technique of wintering. In general, the use of natural and synthetic auxins positively influenced all the variables analyzed, surpassing the controls. It should be noted that the IBA was statistically superior to the other treatments for the response variables of the treatments applied (notes) and number of roots. It can be concluded that this species may be an advertisement for this technique, since it presented a higher number of rootes weeds in a shorter time, when compared to other forest species.
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