Study on the Shoot Cutting of Castanea mollissima

The rate of rooting of cutting of Chinese chestnut twigs has been raised stably by treatment with rooting dust of IPGC made in our own forestry farm and intermittent spraying under all light shining. The rooting rate of cuttings from 1-year-old seedling was more than 98%;when the cuttings were from 3-year-old and 6-year-old mother tree,the rooting rate was 76% and 51% correspondingly. The last ten-day period of June is the best time for setting cuttings. When the cutting bed was mixture of pearlite and quartz sand (volume of 1:1),the rooting rate was 93%; when the relative humidity 95%～100%, the rooting rate was 96.5%. The rooting rate of cutting from middle shoot was 96.6%,which was higher than that from the head shoot and binal branch.