当归根际微生物种群结构与生态分布的研究

Population structure and ecological distribution of rhizospheric microorganisms of Angelica sinensis

目的:研究当归根际微生物的种群结构及其生态分布。方法:采用微生物分离、培养与鉴定等生物学方法以及物种多样性的统计分析方法。结果:在当归生长过程中,甘肃岷县、云南鹤庆和四川宝兴等地区当归根际微生物数量均呈现增加的趋势,10月份以后各类微生物数量又呈现下降的趋势。岷当归根际细菌与真菌的数量比值普遍高于云当归和川当归。此外,在当归的不同产区,根际微生物种群多样性及其变化不同,岷当归根际微生物的优势种群数目较多,根际细菌、放线菌、真菌种群更具多样性。结论:岷当归根际微生态系统及其微生物种群结构较为稳定,有利于当归的生长繁殖。

Objective： To study the population structure and ecological distribution of the rhizosperic microorganisms of Angelica Sinensis. Method： The isolation, culture and identification of microorganisms were studied by the biological methods, and the achieved data were analyzed by the statistical methods for analysis of species diversity. Result： With the growing stages of A. sinensis from Min county of Gansu province, Heqing of Yunnan province and Baoxing of Sichuan province, the quantity of rhizosperic microorganisms increased; and it had reduced since October. In the area of Min county Gansu province, the number ratio of bacteria and fungi was higher than that in the other two areas. In addition, the population diversity and dynamic change were different in three areas. In the area of Min county Gansu province, the number of dominant microbial populations and the population diversities of bacteria, actinomyces and fungi in the rhizosphere were greater than those in the other two areas. Conclusion： The microecological system and microbial population structure in the rhizosphere of Min county Gansu province were stable. And it was suitable for the growth of A. sinensis in this area.