Application of stimulating treatment in rooting of conic spruce cuttings
The economic use of representatives of the genus spruce (<i>Picea</i> L.) is diverse, thanks to a unique set of useful features and properties. Many species have inherited forms in their composition. Their use is hindered by the lack of adapted technologies for propagation of planting material. The aim of the research is to compare the effectiveness of using biologically active drugs in conic spruce cuttings. The object of research was a decorative form of a blue spruce (<i>Picea glauca</i> (Moench) Voss) with a conical crown or spruce 'Conica' (syn.: <i>Picea canadensis cv. conica, Picea glauca f. albertiana cv. conica</i>). Biologically active drugs were tested: heteroauxin, zircon, kornevin, epin, ecofus, ferovit, extrasol, siliplant. Exposure for all options and controls (water) - 18 hours. In the statistical processing of the material, the analysis of variance is used. Various degrees of influence of preparations on the regenerative ability of cuttings and on the indicators of subsequent development of their aboveground part and root systems were established. To a greater extent, the reaction to the use of stimulants is noticeable in the estimates of callus formation, the number and extent of the formed adnexal roots. For the total length of the roots, the best results were obtained using heteroauxin (99.85±6.46 cm) and siliplant (99.23±6.36 cm), which is significantly higher than the control (42.39±4.36 cm) and the generalized average (65.81±2.06 cm). The ANOVA confirmed the significant differences between the results of stimulating treatment of conic spruce cuttings. The most sensitive was the ability to active rhizogenesis: percentage of differences generated by the actual variants, reached 34,17±0,94%, at Fh = 36,21. The results of rooting cuttings indicatesufficient for the vegetative propagation potential of growth and development aboveground mass of exotics in the conditions of Nizhny Novgorod region.