Published in Scientific Papers. Series B, Horticulture, Vol. LXVI, Issue 1
Written by Diana VÂȘCĂ-ZAMFIR, Cristian Mihai POMOHACI, Ovidiu Ionuț JERCA
Plants, as intelligent organisms, have developed mechanisms for survival, which humans have studied and used to expand the methods of multiplication of various categories of plants. In the field of ornamental plants one of the most common method of propagation is the vegetative method by cuttings. In the present work, the testing of the most commonly used rooting substrates (sand, perlite, peat, peat mixed with perlite 1:1) for the top cuttings of shoots of some indoor ornamental species, decorative by flowers and leaves (Nerium oleander, Pelargonium odoratissimum, Croton variegatus, Hypoestes sanguinolenta, Coleus hybridus) continued. The parameters analysed to evaluate the efficiency of the rooting substrate were some biometric characteristics the average length of the main root and the average length of shoots together with the rooting percentage. For the statistical interpretation of these parameters, the IRP (index of Root and Peak) indicator was developed. The consistency of the IRP indicator was analysed using the Alpha Cronbach coefficient.
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