Effects of Flaveria bidentis Invasion on Soil Microbial Functional DiversityChinese Full Text
ZHAO Xiao-hong;HUANGFU Chao-he;QU Bo;WANG Yue-juan;WANG Hui;LIU Hong-mei;YANG Dian-lin;College of Horticulture, Shenyang Agriculture University;Agro-Environmental Protection Institute,Ministry of Agriculture;College of Plant Protection, Shandong Agricultural University;
Abstract: The influence of invasive plant invasion on soil biodiversity has become one of popular issues of ecology. In present study, the ef-fect of Flaveria bidentis, an invasive plant, on functional diversity of soil microbial communities and soil microbial biomass was investigated by using Biolog-ECO technique and chloroform fumigation extraction. Soil samples were collected in invaded area bulk soil（BS）, rhizosphere soil（RPS）and non-invasion area（CK）in August, 2012. The results showed that the soil microbial metabolic activity significantly increased following the invasion of F.bidentis. The average well color development（AWCD）which directly reflected the microbial activities changed as following: RPS＞BS＞CK, with significant difference（P＜0.05）. The CK was significantly higher in Shannon-Wiener index（H）of soil microbial community than BS with significant rhizosphere effect detected. The principal component analysis（PCA）indicated that the variance contribution rate of PC1 and PC2 were 45.68% and 19.83%, respectively. Carbon source utilization ways of soil microbial community changed following the invasion of F.bidentis. The main carbon source of soil microorganisms were sugars, amino acids, carboxylic acid and polymer. Soil microbial biomass carbon of BS and RPS were increased by 27.05%、121.52% compared with CK, soil microbial biomass nitrogen of BS and RPS were also increased by 37.40%, 79.80%. Correlation analysis showed that the AWCD had highly significantly（P＜0.01）positive correlation with soil microbial biomass carbon and nitrogen. Therefore, the function of soil microbial metabolism and soil microbial biomass carbon and nitrogen were enhanced, while the soil microbial community functional diversity was reduced following the invasion of F. bidentis.
- DOI：
10.13254/j.jare.2014.0044
- Series：
- Subject：
- Classification Code：
S154.36
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