Dumitru Zaharia

Research Concerning the Behavior of Sempervivum Plants under Treatements with Herbicides

The research conducted focused on determining the behavior of Sempervivum montanumplants when treated with herbicides. Six products were used with the following commercial names:Fusilade, Select, Pantera, Goal, Afalon Premiant. From each herbicide were prepared three solutionsof different concentrations (0.2%, 0.1%, 0.05%). With these solutions the Sempervivum montanumplants were sprayed. The effects on the plants were observed after 10-14 days. By determinations wasestablished the number of plants fatally affected, partially affected and unaffected. The research resultsshows that herbicides applied at a concentration of 0.2% are harmful to Sempervivum montanumplants, but in a very variable amount depending on the herbicide. The most powerful harmful effectswas observed in treatment with Goal herbicide. Definitive recommendations can not be made, for thisfurther research is required.

RESEARCH REGARDING THE PROPAGATION OF SOME DECIDUOUS SHRUBS USED FOR GREEN FANCES

,The research where carried out in the greenhouse experimental plots afferent to the Flower and Arboriculture Department, Faculty of Horticulture, University of Agricultural Science and Veterinary Medicine Cluj-Napoca The biological material taken into study was represented by cuttings provided by species Buxus sempervirens, Ligustrum vulgare and Ligustrum ovalifolium var. aureo-variegata. The cuttings have been collected after the green fence cuts made in the USAMV Park Cluj-Napoca. The experimental factors where: root substrate (Perlit 100%, Perlit 50% + Peat 50%), used species (Buxus sempervirens, Ligustrum vulgare, Ligustrum ovalifolium var. aureo-variegata), rooting regulator: Radistim 2. The tree factors where divided in tree repetitions. During the experiment the following observations where made: length of cuttings (cm), no. of leafs, diameter at the cutting base (mm), no. of nodes, no. of cuttings with root system, no. of roots/cutting, the length of the root (cm), the length of the root system (cm). Before root beginning at each species where made the following determinations: origin of the cuttings, length (cm), and no. of leafs, diameter at the base of cutting, no. of nodes. The main characteristics of the cuttings taken into study are in concordance with each species studied.