关键词: 三七, 微生物群落, Biolog, 土壤有机质

Abstract: Panax notoginseng is a famous rare medicinal herbs, which has a variety of medicinal functions. Because of continuous cropping, its yield and quality are greatly affected. This research studied the polymorphism of the microbial community about the Panax notoginseng rhizosphere soil (planted for two years, planted for three years, planted healthy plants and planted susceptible disease), aimed to reveal the relationship among them. Based on different carbon and nitrogen sources utilization in microbial communities, we used Biolog ecological culture plate to culture different microorganism in rhizosphere soil, cultured for 4 h, 24 h, 48 h, 72 h, 96 h, 120 h, 144 h and 168 h to assess the changes of metabolic level. In different planted years and healh status, we also made a comparative analysis of organic matter soil fertility properties. Research results showed that: Rhizosphere soil of healthy Panax notoginseng and susceptible disease were great different, such as nitrogen, phosphorus, potassium and magnesium content, physiological activity and soil microbial communities in rhizosphere soil of healthy Panax notoginseng were higher than the susceptible disease soil; organic matter soil fertility properties changed in Panax notoginseng soil, especially the soil microbial metabolism were reduced and microbial structure became single. Through the research, it can provide some edapholoy scientific information and theoretical basis on overcoming continuous cropping obstacles.

Key words: Panax notoginseng, microbial community, Biolog, soil organic matter