论文部分内容阅读
人参皂苷不仅是人参主要的药用活性物质,而且人参皂苷是人参化感作用的主要化感物质,其在人参植株生长及生态适应性方面发挥重要作用。为了研究人参皂苷对土壤微生物群落的影响,采用外源添加的方式研究人参总皂苷对新林土中微生物群落动态的影响,分析新林土中微生物群落代谢活性的变化趋势,探讨人参皂苷对土壤微生物群落的生态学效应。与对照相比,加入人参总皂苷10 d和40 d后新林土中土壤微生物群落的代谢活性均显著高于对照组,处理10 d后土壤微生物群落多样性指数除了均匀度指数(E)外,其他多样性指数随皂苷浓度升高呈现出先升高后降低的趋势,其中,低浓度处理碳源利用丰富度指数(S)与对照相比差异显著。后期除了均匀度指数(E)外,其他多样性指数高于对照。人参总皂苷可改变新林土中土壤微生物群落的组成和代谢活性,人参皂苷在土壤中的积累可以改变土壤微生态环境从而影响人参生长。
Ginsenosides are not only the main medicinal active substances of ginseng, but also ginsenosides are the main allelochemicals of the ginseng allelopathy, which play an important role in the growth and ecological adaptability of ginseng plants. In order to study the effect of ginsenoside on soil microbial community, the effects of ginseng total saponins on microbial community dynamics in new forest soil were studied by exogenous addition, the change trend of metabolic activity of microbial communities in new forest soil was analyzed, and the effects of ginsenosides on soil Ecological effects of microbial communities. Compared with the control, the metabolic activities of soil microbial community in the new forest soil after 10 and 40 d of Ginseng treatment were significantly higher than those in the control group. After 10 days, the diversity index of soil microbial community in addition to the evenness index (E) , And the other diversity indices showed a trend of first rising and then decreasing with the increase of saponin concentration. Among them, the difference of carbon enrichment index (S) of low concentration treatment carbon source was significant different from that of the control. In addition to the evenness index (E), the other diversity index was higher than the control. Ginseng total saponin can change the composition and metabolic activity of soil microbial community in new forest soil, and the accumulation of ginsenosides in soil can change the soil micro-ecological environment and thus affect the growth of ginseng.