Study On Propagation Technique In Cuttings Of Tetraena Mongolica Maxim.

The purpose of the study was to investigate rooting characteristics of cuttings of Tetraena mongolica from aspects of length and ages of cuttings, external hormone, leaf retention, cutting orientations and cutting positions and so on.The results obtained by the experiments indicated that the rooting ratio of two or three years old of cuttings was larger than more than four years old of cuttings. The rooting rate of cuttings became larger as the leaf retention increased. The rooting ratio, average rooting number and average rooting length of the cuttings made of the upper part of the shoot were significantly larger than those made of the base of the shoot. The rooting ratio of hardwood was increased by external hormone treatment, especially when treated by 500mg/L IAA, the rooting ratio reached 96.7%.While the rooting ratio of softwood is 83.3% when treated by 500mg/L NAA.The root mainly came from callus and few cuttings rooted from callus and cortex. Callus began to appear in 3d after cutting. Most of cuttings were all healed in 6d after cutting. Higher rooting period occurred in 7～10d after cutting.