Abstract:

The comparison of some biological characteristics of six variation types of Dendrobium devonianum Paxt. was performed to evaluate the variation and provide support for production and selecting species. Three sampling sites (2 m2 for each) from each base were selected. Followed data were recorded: Number of plants for each type; stem length, stem thick, stripes numbers, fresh weight, leaf length, leaf breadth, length breadth ratio and leaf area. The significance of differences and principal component analysis was used to analyze different biological characteristics by SPSS. The results indicated that: the narrow leaf/muscular type had the maximum proportion but the red core type had the least proportion among six variation types; the Bermuda grass herb type had the maximum stem length and stipes numbers, and had significance compared with that of red core type (P<0.05) and purple sheath/muscular type (P<0.05); the stem thick and fresh weight of wide leaf/muscular type was significantly higher than that of other types(P<0.05); the wide leaf/muscular type, narrow leaf/muscular type and purple sheath/muscular type were the first three types for the leaf length, leaf breadth and leaf area, and were significantly higher than red core type(P<0.05); the variation existed in different types were distinct, the fresh weight and leaf area varied obviously; the stem length and stem thick could be used for selecting species of Dendrobium devonianum Paxt. in order to improve efficiency.