Evaluación de dos enraizantes y tres tiempos de desaviado en dos tamaños de cladodios en la propagación de pitahaya amarilla (Hylocereus megalanthus).

Abstract

The effect of two rooting agents and three times of derooting on two sizes of cladodes in the propagation of yellow pitahaya (Hylocereus megalanthus) in Sangay parish, Morona Santiago, was evaluated. The ground study was cleaned and disinfected, and the substrate was sheathed for planting. The selected pitahaya cladodes were from an established crop with ten years in production with excellent phytosanitary conditions and desirable agronomic characteristics, with a size of 50 and 100 centimeters, with times of 2, 4, and 6 days under shade. In addition, two rooting agents were analyzed Naphthaleneacetic acid, two-second contact, and Ecklonia maxima seaweed extract, a dose of 5ml/l of water for two minutes, and the cladodes were planted by sheaths. The following variables were evaluated: days to first growth (dds), number of growths, growth length (cm), root length (cm), number of roots, root fresh weight (gr), and apprehension percent (%); for this, it was used a completely randomized block design with the trifactorial arrangement. Statistical analyses were performed in the InfoStat program, and the Tukey test with a significant difference of 0.05 was used to determine the treatment with the best results. The rooting agent naphthaleneacetic acid had a significant influence on root generation. The six-day derooting time influenced the formation of the first growth and their length; however, the two-day derooting time had a higher effect on the formation, length, and the number of roots; the 100 cm cladodes gave better response in the number and length of growths. The combination of naphthaleneacetic acid with six days of derooting and 100 cm cladodes produced better results, and therefore this was recommended for the propagation of yellow pitahaya.