Impacts of Invasive Alien Weed Solidago canadensis L. on Microbial Population in the Root Soil

Abstract

Abstract: studies were conducted on microbial flora in the root soil of invasive alien weed Solidago canadensis L. and Solidago decurrens Lour. The results indicated that allelopathic weed Solidago canadensis L. had a significant influence on the microbial flora. Solidago canadensis L. caused greater reduction on the number of fungi compared with the blank. The reverse was true on bacteria and actinomycetes. While native weed Solidago decurrens Lour. inhibited the growth of fungi, bacteria and actinomycetes. Further analysis indicated that the root exudates of Solidago canadensis L. promoted the number of nitrite bacteria, aerobic azotobacter, sulphate reducer, ammonifier and aerobic cellulose-decomposer. But the growth of denitrifier, anaerobic cellulose-decomposer and desulphate reducer were inhibited by the invasive alien weed. Finally, the ecologic mechanisms that may influence the diffuse of invasive alien plant were also discussed.

CLC Number:

Q948.1

Shen Lihua,, Guo Qiongxia, Li Wenxiong,, Chen Yin, Huang Zhen. Impacts of Invasive Alien Weed Solidago canadensis L. on Microbial Population in the Root Soil[J]. Chinese Agricultural Science Bulletin, 2007, 23(4): 323-323.

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