Cutting propagation in Thuja occidentalis L. fastigiata using rooting stimulators (in English)

This study concerns different aspects of the rooting of Thuja occidentalis L. fastigiata cuttings. There were studied the influences of the soil and of the rooting stimulators on the cuttings in Thuja occidentalis L. fastigiata. The experience was valued as a bifactorial one with two factors: A-the soil: a1-sand, a2-perlit and B-the rooting stimulators: b1-untreated cuttings, b2,b3-treated cuttings with powder stimulators (1000 ppm and 2000 ppm ANA), b4, b5, b6-immersion of the cuttings in a solution for 2, 6 and 12 hours (100 ppm alphanaphtilacetic acid, ANA). The results were interpreted using the analysis of variance. Concluding this study, the rooting of Thuja occidentalis L. fastigiata cuttings is best to be made in spring, on perlit, using stimulators for rooting, conditioned as powder (2000 ppm ANA) or the immersion of the cuttings in a solution (100 ppm ANA for two hours). Using this method, the length and the weight of the roots are higher and the rootings percentage is over x5%.