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首页> 外文期刊>Journal of Residuals Science & Technology >Effects of Long-term Elevated CO2 Fumigation on Microbial Communities in a Wetland Soil
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Effects of Long-term Elevated CO2 Fumigation on Microbial Communities in a Wetland Soil

机译：长期升高的CO2熏蒸处理对湿地土壤微生物群落的影响

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In this study, we studied the effects of different Carbon dioxide concentrations on microbial community diversity in a wetland ecosystem in northern China. The open-top chamber (OTC) was situated in the boggy soil in which the dominant plant is Deyeuxia angustifolia. Between 2010 and 2013, we maintained the average Carbon dioxide concentration in OTC at 370 ppm, 550 ppm and 700 ppm. Soil samples were collected during the last year. Results show that soil fungal diversity indices in the 0–10 cm soil layer were significantly decreased by elevated concentration of CO2 by 4.570 in ck. It was increased by 4.456, 4.373 and 4.13 by 350 ppm, 500 ppm and 700 ppm CO2, respectively. Soil bacterial diversity indices in the 0–10 cm soil layer, however, were not significantly influenced by elevated CO2 (P 0.05). The results of principal component analysis (PCA) and Redundancy analysis (RDA) indicate that elevated CO2 had no strict specificity with bacterial community diversity but strict specificity with fungal community, while environmental condition had great influence on fungal community diversity and soil nutrient. Organic carbon, nitrate nitrogen (NO-N), C/N, total nitrogen (N) and pH were the primary impact factors. These results suggest that the environmental conditions exhibit great influence on the community diversity of fungi and bacteria. It is also found that soil nutrient were indicative of the change of community diversity of fungi and bacteria.
机译：在这项研究中，我们研究了不同二氧化碳浓度对中国北方湿地生态系统中微生物群落多样性的影响。敞顶室（OTC）位于沼泽土壤中，优势植物为安氏Deyeuxia angustifolia。在2010年至2013年之间，我们将OTC中的平均二氧化碳浓度保持在370 ppm，550 ppm和700 ppm。去年收集了土壤样品。结果表明，ck处的CO2浓度升高4.570会显着降低0-10 cm土壤层的土壤真菌多样性指数。它分别以350 ppm，500 ppm和700 ppm的CO2浓度分别增加了4.456、4.373和4.13。然而，在0-10 cm的土壤层中，土壤细菌多样性指数并未受到CO2升高的显着影响（P> 0.05）。主成分分析（PCA）和冗余分析（RDA）的结果表明，升高的CO2对细菌群落多样性没有严格的特异性，但对真菌群落具有严格的特异性，而环境条件对真菌群落多样性和土壤养分有很大的影响。主要影响因素是有机碳，硝酸盐氮（NO-N），C / N，总氮（N）和pH。这些结果表明环境条件对真菌和细菌的群落多样性表现出很大的影响。还发现土壤养分是真菌和细菌群落多样性变化的指示。

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