The Influence of the Substrate on Striking Roots At

Abstract

After a convincing presentation of Thuja Occidentalis Danica, as ornamental specie with useful economic implication, that can be multiplied on vegetative way through cuttings, the author, based on the conducted experiments, reach the conclusion that the substrate formed out of 50% perlite and 50% peat, ensures the striking of the roots of the cuttings, in a percentage of 89.3%. Thuja Occidentalis Danica is an ornamental tree with a globular port, a brown-reddish bark, compressed tendrils and flake shaped leaves grouped on 4 rows distributed oppositely. (Foucard, 1994). Semi-ligneous cuttings of Thuja Occidentalis Danica were collected at a length between 8-10 cm. The experience was organized in 4 variants: V1 – rooting in sand, V2 – rooting in perlite, V3 – rooting in peat coal, V4 – rooting in a substrate composed of 50% perlite and 50% peat coal. A number of 600 cuttings were used for each variant.