Abstract: Propagating Crassulaceae by using cut leaves from the plants with treatment of growth regulators was studied. Applying the subordinate function method, the effects of two types of hormones on 4 varieties of Crassulaceae were evaluated. The results showed the application of 200 mg·L^-1 NAA on Echeveria elegans var. Kesselringiana, xSedeveria (Blue Elf) and Echeveria cuspidata var. zaragozae Kimnach yielded the desirable effect with subordinate function value of 0.95, 0.90 and 0.90, respectively; while, that of 100 mg·L^-1 IBA on Echeveria (Lola) with a subordinate function value of 0.84. The growth indices of the leaf-cuttings were significantly different between varieties (P<0.05). The 91.54% rooting and 99.01% survival rates of Blue Elf and the 97.33% germination rate of E. cuspidata were the highest among all varieties studied. The seedling survival rates of the 4 varieties were all greater than 90%, which were 6.26%-22.99% higher than control. It indicated that either NAA or IBA could be used effectively and economically to promote the Crassulaceae propagation from cut-leaves.

Key words: Crassulaceae plants, cut-leaf propagation, plant growth regulator, subordinate function method