Study on technology and rooting capability of harwood cutting propagation of Picea likiangensis

The purpose of the study was to investigate the rooting ability of individual plant,plant hormones,ortet ages,cutting types,cutting positions,cutting lengths and cutting orientations.The results obtained by the experiment indicated that there were differences in rooting ratio among different individuals.The highest rooting ratio occured in 19 and 12 individuals,whose rooting ration were 98.8.The rooting ratio of hardwood was increased by plant hormone treatment,especially when treated by IBA 200 mg/kg 5 h,the rooting ratio reached 71.4.The rooting ratio and average rooting number of young individuals were larger than those of mature individuals.The rooting number and the rooting ratio of one year cutting was greater than that of two year cutting.Differences existed in rooting ratio among different cutting lengths.The highest rooting ratio appeared in 5-10 cm cutting and the most rooting number in 15-20 cm cutting.There were no differences in rooting ratio between south and north cutting orientation in the ortets.At xianggelila of Yunnan Province,cuttings were all healed in 35 d after cutting.Higher rooting period occured in 55-65,75-85 d after cutting.