Effect of Cutting Length on Rooting and Growth of Two-year-old Plantlets of Larix kaempferi in Nursery

Effect of cutting length of Larix kaempferi on rooting and growth of rooted cuttings was studied in a nursery.Cuttings in different sizes were all rooted satisfactorily(88%～99%)though rooting percentage of cuttings of 10 cm in length was significantly higher than that of cuttings of 15 cm or 20 cm in length.The height of rooted cuttings in the firest yar varied significantly according to the length of cuttings.If the height of rooted cuttings was higher or equal to 16 cm in height,the survival percentage of rooted cuttings after being transplanted in the field,percentage of two-year-old plantlet harvested and percentage of first class plantlets were significantly or obviously higher than that of the rooted cuttings of 12.2 cm in height.Comparing to the cuttings of 10 cm in length,the cuttings of 15 cm,20 cm in length could produce more two-year-old platlets and more plantlets of first class per 100 cuttings.