Abstract:

The influence of rooting media, auxin type, auxin density and treatment time on adventitious rooting of Camellia oleifera cuttings was examined in this paper. In order to find out the best treatment for rooting in cuttings, rooting rate, average adventitious root (AAR) number and AAR length were investigated. The result showed that: when planted in the substrate (80:20 mixture of red soil and sand), the rooting ratio, AAR number and AAR length were 71.7%, 2.4 and 2.5 cm. The most appropriate rooting of auxin type was rooting powder and the rooting percentage, AAR number and AAR length were 56.7%, 5.2 and 3.2 cm. The effects of the cuttings soaked for 2 h in 25 mg/L rooting powder were higher than other soaking-treatments and the rooting ratio, AAR number and AAR length were 73.3%, 4.6 and 1.8 cm. But for the dipping-treatments the cuttings dipped for 10 s in 300 mg/L rooting powder was the most effective way, the rooting percentage, AAR number and AAR length were 81.7%, 5.0 and 1.3 cm. Especially, the result of the optimal quick-dip treatment was better than the optimal soaking treatment. The most optimized treatment for rooting in cuttings of C. oleifera in autumn was that the cuttings were dipped for 10 s in 300 mg/L rooting powder and then planted in the substrate (80:20 mixture of red soil and sand).