Abstract: As an important medicinal plant resource in Yunnan province, Panax notoginseng plays an important role in the field of medicine in China. Due to the serious continuous cropping obstacles in its production process, it restricts the development of planting industry, Chinese herbal slices industry, pharmaceutical industry and other related industries. In this paper, the species of root exudates of P. notoginseng and their effects on soil microbial community structure, soil physical and chemical properties, soil enzymes activities and plant growth of P. notoginseng were summarized. And the ecological effects of root exudates of P. notoginseng on continuous cropping obstacles were discussed, as well as the measures relieving and preventing continuous cropping obstacles of P. notoginseng.

Key words: Panax notoginseng, continuous cropping obstacles, ecological effects, root exudates, relief；prevention

摘要： 三七作为云南省重要的药用植物资源，在我国医药领域有着重要地位，由于其生产过程中连作障碍十分严重，制约了其种植业、饮片业、制药业等相关产业的发展。通过总结三七根系分泌物的种类，及其对土壤微生物群落结构、土壤理化特性、土壤酶活性和三七植株的影响，探讨三七根系分泌物在连作障碍中的生态效应，提出三七连作障碍的缓解和防治办法。

关键词:
三七, 连作障碍, 生态效应, 根系分泌物, 缓解, 防治