Evaluation of the productivity and rooting of cuttings of ten Eucalyptus clones clonal propagation

Resumen

Objective: evaluating the productivity of mother plants and the rooting percentage of cuttings of Eucalyptus grandis, Eucalyptus urophylla and Eucalyptus urograndis.

Design: Ten clones of each species were evaluated in a clonal miniature garden in a gutter system fitted with drip irrigation.

Results: The assessed number of sprouts and viable cuttings variables registered high significant differences (P <0.0001) between clones: UP1 (17,947 shoots and 34.05 viable cuttings), UG2 (12,120 shoots and 22.96 viable cuttings) and G2 (10,254 shoots and 23.96 viable cuttings). Regard the measured parameters in the irrigation water, the average values of EC 0.5 mS/cm and pH 5 to 7 were obtained. The stem cuttings established in the module had high significant differences (P <0.0001) in terms of the rooting percentage.  Three clones were superior, the best of which, clone G2, reports 78.58% rooting, which developed in environmental conditions of relative humidity greater than 80% and temperature between 25-30 ° C.

Findings/conclusions: With the obtained values from the measured variables, a rooting productivity projection was carried out considering a 54 mother plants / m² density, resulting in a minimum average annual production of viable cuttings from 10,000 to 27,000 depending on the clone, with 2,000 to 18,000 cuttings with rooting possibilities per square meter.