Asexual Propagation of Picea pungens 'Koster' through Cuttings, and grafting under Various Hormonal Treatments

In order to study the asexual propagation of blue spruce clone, two separate studies were designed
and carried out. Two common grafting methods under two hormonal treatments on Picea excelsa L.
through on RCB design (RCRD) were performed. Cuttings were prepared at two different times of
year and under different hormonal treatments .as Analysis of compound with three replications in
each trial. In the first treatment, the hormone application on scions, caused a 15% improvement in
graft success as compared to control. Side wedge grafting caused a 19% increase in grafting
improvement as compared to side veneer grafting. In the second trial, hormone treatments showed a .
significant difference in all the rooting indices at 5% level. Also the interaction effect of time
onadventitious root development demonstrated a significant difference. The highest rooting percent,
the most adventitious roots number and the most callused cuttings were obtained through applying
8000, 4000 and 2000 ppm IBA, respectively. The highest mean of root length was obtained by
applying 2000 ppm IBA in July.