鱼藤属植物优异物种筛选及引种栽培研究

Widely distributed in southwest China, Derris Lour. has a promising development andutilization value as raw material source of biopesticide rotenone. In order to explore germplasmresources with high rotenone content and excellent agronomic traits, promote the cultivation ofDerris and the development of rotenone industry, we collected 14 Derris species and measuredtheir rotenone content through a resource survey in south China and Vietnam, focused on seedlingbreeding and artificial cultivation technology for two high-rotenone content Derris species. Theresults were as follows: 1All 14 Derris species could be successfully grown in Guilin, and thehigh-rotenone content Derris species including Derris elliptica and Derris montana were selectedfor further research; 2Both of the cutting survival rate of the two Derris plants reached morethan 95%; the rotenone was mainly concentrated in plants root, rotenone content of thick rootswas higher than that of thin roots, rotenone content in the xylem was higher than that in the phloem; 3 the highest rotenone content reached 14.12% for D. elliptica and 6.75% for D.montana, rotenone content of the two Derris plants were fluctuated with the seasons, rised rapidlyfrom the sprouting period of the plants in spring and maintained at high levels thereafter. All theseresults showed that D. elliptica has high exploitation value, D. montana with more rapidly growthand higher yield compared with D. elliptica, also has high exploitation value.