INFLUENŢA PRODUSELOR RADISTIM ŞI A ACIDULUI INDOLIL ACETIC ASUPRA PRINCIPALELOR CARACTERISTICI DE ÎNRĂDĂCINARE A BUTAŞILOR VERZI LA UNELE SPECII DE ARBUŞTI FRUCTIFERI RADISTIM AND INDOLIL ACETIC ACID INFLUENCE ON BERRIES SOFTWOOD CUTTINGS ROTTING CHARACTERISTICS

The precocity and high fruit quality made the culture of small fruits very important worldwide and in our country as well. For finding more efficient techniques to produce the planting stock for these species, some investigations were carried out at the Research Institute for Fruit Growing Pitesti during 2008-2009. The following experimental scheme was organized: A Factor – Species involved, with the graduations: a1= chokeberry; a2 = hip rose (Rosa canina); a3 = thorn blackberry; a4 = honeysuckle; a 5 = thornless blackberry; a6 = sea buckthorn; B Factors – rooting biostimulators with the graduations: b1 = without biostimulators (control); b2 = Radistim (powder); b3 = indole acetic acid. The rooting of softwood cuttings was don eon a substratum consisting in 60% peat, 20% manure and 20% sand. This substratum of 8-10 cm thick was placed in plastic boxes put on high beds in a solarium where artificial mist may be applied for a given amount of time at set intervals. On average, in the 3 biostimulator treatments, the percentage of rooted cuttings ranged between 27.8% (choke berry) and 96.75% (sea buckthorn). The cutting length where roots developed was variable from 1 cm (chokeberry) to 9.39 cm (sea buckthorn) and the number of main roots per cutting ranged between, 4.78% (rose hip) and 21.89 (choke berry). The number of main roots emerged from the cutting stem was significantly higher by 116% versus the number of roots emerged from the callus zone. On average, for the 6 species, the application of the 2 biostimulators induced a significant increase (13-15%) of the rooted cutting, of cutting stem length developing roots (19-30%) and of major roots number (34-35%) versus the treatment without biostimulators. Regarding the values of growth characteristics, no significant differences were noticed between the 2 biostimulator treatments in all 6 graduations of A factor.