VEGETATIVE PROPAGATION OF Retrophyllum rospigliosii (Pilg.) C.N. Page “ULCUMANO” IN SUB-IRRIGATION CHAMBER IN CHANCHAMAYO / PERÚ

Abstract

The ulcumano (Retrophyllum rospigliosii) is an important native conifer of Peru, which is currently disappearing from the areas where it was dominant, due to its excessive use and problems in its regeneration. Also, there is limited information on its vegetative propagation. For this reason, the objective was to determine the efficiency of the vegetative propagation of the ulcumano in the sub-irrigation chamber. Four concentrations of IBA were used (0, 1 000, 3 000 and 5 000 ppm), two ages of mother plants (two and eight years) and two types of cuttings (apical and middle); under a completely random factorial design. The results indicate that, at the end of 17 weeks, the T7 treatment (corresponding to medium type cuttings, from two-year-old mother plants and treated with 3 000 ppm IBA) obtained the highest rooting (40%), root length (7 mm) and number of roots per cutting (2.2). Auxin AIB didn´t influence rooting. Type cuttings influenced survival, rooting, and sprouting. The interaction between the cuttings mother plant and type of s had a significant influence on rooting success, two-year-old trees and medium-type cuttings obtained higher survival (76.85%), rooting (32.5%) and sprouting (70%). It is concluded that it is possible to propagate ulcumano using middle cuttings of two-year-old trees.