Rooting of the high seedling stem of yellow passion fruit for deep planting

Abstract

The objective of this work was to evaluate the effect of the application of indolebutyric acid (IBA) to induce the rooting of the high seedlings of the yellow passion fruit tree by the air layering for deep transplanting with drowning of the neck and part of the stem of the plant. Yellow passion fruit trees with 90 days old, two meter long, had the neck and one meter of stem surrounded by plastic tubes of polyvinyl chloride (PVC) of 75 mm diameter filled with organic soil. For the grounding of the stem, all leaves were removed in the first 100 cm of the stem, parallel cuts were measured in the epidermis with steel blade and applied IBA diluted in industrial talc at the concentrations of 0; 1,000; 2,000; 3,000 and 4,000 mg kg^-1 of AIB. The experimental design was a randomized block design with five treatments and four replicates of four plants each. Rooting percentage, minimum and maximum rooting height, number of roots and callus per plant and root dry mass were evaluated. Rooting of the stem increasing linearly from 60% without application of IBA to 92.5% at the concentration of 4,000 mg kg^-1. The number of roots, calli and root dry mass did not vary between AIB concentrations. Rooting occurred on average between 0.16 m and 0.69 m from the colon.