Rooting Capability of Twigs of Picea abies

Using river sand as medium,the cutting experiment of Picea abies was carried out under the full sunlight and automatic intermittent spraying.The results showed that cuttings treated with different hormones generated significantly different rooting rates,and in the order of ABT1GGRIBANAA.However,the number of roots generated,total rooting length and the root effect index of the cuttings treated with IBA were better than those treated by other hormones.The rooting rates were the highest when the cuttings were treated by ABT1 with the concentrations of 100 mg·kg-1 for 30 min and 200 mg·kg-1 for 2 h.The number of roots generated,total rooting length,and root effect index were the highest when the cuttings were treated by ABT1 with the concentrations of 50 mg·kg-1 for 1 h.The number of roots generated,total root length and the root effect index of shoots with hardwood outnumbered shoots,and cuttings length at 15 cm were the best.The rooting rates of the cuttings from 23 a mother trees were 0.0%.