Research on media selection and cutting effects in the cuttage of Picea abies

Using six-year-old Picea abies as ortets,a systematic study was conducted on the response of different cutting conditions to rooting and growth of cutting,the effect of media in degradable containers on the cutting growth was observed at the same time.The results showed that the formation of callosity was started to form at 20 d after propagated,the root tip was appeared at 37 d,the time between 50-65 d was the fatigue of rooting and the development period of root system,the root system was formed basically when 65 d.There was extremely significant differences of rooting rates among different media,peat+ char rice husk(1∶2) was the ideal medium for P.abies cutting propagation.The cutting conditions had significant effect on the formation of root and seedling,the rooting rate of the primary lateral branch could reach 100%.The rooting rate of the cuttings with top bud was higher than that of the cuttings without top bud.The optimum cutting length was 5-10 cm.The cutting age and position effect were distinct,the cuttings of one or two-year-old from mother tree middle part had high cutting survival rate and the roots of survival seedlings were upgrowth and haleness.The cutting seedlings propagated from different cutting conditions were cultivated for one year,and they exhibited great variations in mass growth,which was related with the cuttings health.