Ožiljavanje reznica zelkove kao alternativne neinvazivne vrste 'quick-dip' i kontakt metodom

Abstract

U radu su analizirane dve metode ožiljavanja zelenih reznica zelkove (Zelkova carpinifolia (Pall.) K. Koch ): (1) 'quick-dip' metoda i (2) kontakt metoda kod koje je tanka polietilenska folija (20 mm) stavljana direkt no na reznice tokom ožiljavanja. Kontrola za kontakt metodu bili su niski tuneli sa debljom folijom. Jedna grupa reznica iz kontakt metode tretirana je sa 2.500 μg·mL-1 IBA rastvorenom u etil alkoholu u trajanju od 5 sekundi, druga grupa vodenim rastvorom IBA (50 μg·mL-1) 24 časa, a treća kontrolna grupa pobadana je bez tretmana. Iste grupe korišćene su i kod niskih tunela. Kod ožiljenih reznica konstatovani su broj i dužina primarnih i sekundarnih korenova, a rezultati svih tretmana pokazuju da je kontakt metoda u kombinaciji sa vodenim rastvorom IBA bila najbolja sa 92% ožiljenih reznica. Značajne razlike ne postoje ni između ovog tretmana i 'quick-dip' metode kombinovane sa kontakt metodom (85,3%). Ožiljavanje reznica u niskom tunelu bilo je značajno niže. Generalno, kontakt metod je bio bolji od niskog tunela bez obzira na inertni nosač. Rezultati preporučuju skoro nepoznati kontakt metod rasadničkoj praksi za proizvodnju zelkove kao alternativne neinvazivne vrste za uslove Srbije.

Two methods of rooting of Zelkova softwood cuttings were analyzed: (1) quick-dip method and (2) contact method - the thin polyethylene film (20 mm) laid directly over the cuttings during the rooting process. The control for contact method was a low tunnel with a thick polyethylene film. One group of cuttings in the contact method was treated with quick-dip (IBA 2,500 μg·mL-1, carrier-ethyl alcohol) during 5 sec, and the other group was treated with water solution of IBA (50 μg·mL-1) in 24-hour treatment. The third group was control - untreated cuttings. The same groups of cuttings were also used in low tunnels. The number and length of primary and secondary roots were measured on rooted cuttings. The results of all treatments show that contact method in combination with water solution of IBA was the best with 92% of rooted cuttings. No significant differences were obtained between this treatment and quick-dip + contact method (85.3%). Rooting of cuttings under low tunnel was significantly lower. In general, contact method was better than low tunnel, disregarding the carrier used. These results recommend the almost unknown contact method in nursery propagation of Zelkova, as an alternative, non-invasive species for the conditions in Serbia.