Effects of some plant growth regulators on the regulation of root formation and development were studid, and the physiological mechanisms of IBA, ETH, PP333 and GA in regulating root formation and development were discussed.

• 幼苗和3年生幼树为试材,研究了一些生长调节物质对平邑甜茶根系发生的调节,并进一步探讨了吲哚丁酸、多效唑以及赤霉素调控根系发生与生长的生理机制。