کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4489867 | 1317741 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Changes of Soil Microbiological Characteristics After Solidago canadensis L. Invasion Changes of Soil Microbiological Characteristics After Solidago canadensis L. Invasion](/preview/png/4489867.png)
The relationship between Solidago canadensis L. invasion and soil microbial communities was studied across the invasive gradients varying from 0 to 40, 80, and 100% coverage of S. canadensis. The results showed both soil microbial biomass C (Cmic) and N (Nmic) increased as the coverage of S. canadensis increased. Soil microbial quotient Cmic/Corg (microbial biomass C/organic C) tended to increase linearly with the coverage of S. canadensis. Soil basal respiration (BR) also showed a similar trend. The soil respiratory quotient qC02 decreased with S. canadensis invasion, and remained at quite a constantly low level in the invasive soils. Sole carbon source utilization profiles analyses indicated that S. canadensis invasion tended to result in higher microbial functional diversity in the soil. Average utilization of specific substrate guilds was highest in the soil with S. canadensis monoculture. Principle component analysis of sole carbon source utilization profiles further indicated that microbial functional diversity in the soil with S. canadensis monoculture was distinctly separated from those soils in the native area and the ecotones. In conclusion, S. canadensis invasion improved soil microbial biomass, respiration and utilization of carbon sources, and decreased qC02, thus created better soil conditions, which in turn were more conducive to the growth of S. canadensis.
Journal: Agricultural Sciences in China - Volume 10, Issue 7, July 2011, Pages 1064-1071