Study on Cutting Propagation of Macropanax rosthornii

The study was conducted to set up the cutting propagation technology of Macropanax rosthornii andto provide technical supports for the large-scale production of its nursery seedlings and landscape application.The plant Macropanax rosthornii was used to test the effects of different cuttings, substrates, types andconcentrations of growth regulators on its cutting rooting by a conventional cutting experiment. Differentcuttings significantly affected their rooting capacity, and 3-year-old hard-wood cuttings had a notably betterrooting effect than 1-year-old soft-wood cuttings. Significant difference was found in the rooting effect ofsubstrates, in which yellow subsoil and coconut chaff were better than river sand and chaff but perlite had thepoorest rooting effect. The types and concentrations of growth regulators were also important factors thataffected cutting rooting. Treated with IBA at a concentration of 2000 mg/L, the cuttings had a rooting rate of98.8%, root number of 93.75 on an average, root length of 4.23 cm on an average and root effect index of409.18. And compared with the control, the root number and root effect index were increased by 3.54 times and4.35 times respectively. The mixture of different growth regulators made against cutting rooting of Macropanaxrosthornii. The cutting substrate of yellow subsoil and 3-year-old hard-wood cuttings shortly dipped with2000 mg/L IBA were appropriate to the cutting rooting of Macropanax rosthornii. The mixture of differentgrowth regulators were not proper to the cutting rooting of Macropanax rosthornii.