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[1]LAI Qiaohui,ZHANG Hao,LIU Zhipeng.Characteristics of Soil Microbial Community and Their Imapact Factors in Different Constructed Wetlands with Plant Communities[J].Research of Soil and Water Conservation,2019,26(05):89-94,99.

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Characteristics of Soil Microbial Community and Their Imapact Factors in Different Constructed Wetlands with Plant Communities

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 05 Page number: 89-94,99 Column: Public date: 2019-09-06

Title:: Characteristics of Soil Microbial Community and Their Imapact Factors in Different Constructed Wetlands with Plant Communities

Author(s):: LAI Qiaohui¹, ZHANG Hao², LIU Zhipeng³; 1. Guangdong College of Agriculture, Industry and Commerce, Guangzhou 510075, China;
2. Zhongkai University of Agriculture and Engineering, Guangzhou 510075, China;
3. Guangzhou Municipal Engineering Design & Research Institute Co., Ltd., Guangzhou 510075, China

Keywords:: constructed wetland; soil microbial community; soil nutrient; environmental indicator

CLC:: X524

DOI:: -

Abstract:: Hygrophytes are the important parts of a constructed wetland system. Four common wetland plants (Phragmites australis, Acorus calamus, Iris tectorum and Zizania caduciflora) in natural wetlands were chosen. The study compared the environmental indicator of soil microbial community in different constructed wetlands of plant communites by redundancy analysis during five years. The results showed that:(1) soil organic carbon, total nitrogen, total phosphorus, total potassium, available phosphorus and alkali-hydrolyzed nitrogen showed consistent change rules, which follow the sequence:Phragmites australis > Acorus calamus > Zizania caduciflora > Iris tectorum, but there was no significant difference in total phosphorus in different constructed wetlands; (2) constructed wetlands had great impact on soil microbial biomass, and the soil microbial biomass of carbon, nitrogen and phosphorus showed the consistent change rule, which follow the order:Phragmites australis > Acorus calamus > Zizania caduciflora > Iris tectorum; the differences of microbial biomass carbon and nitrogen of different constructed wetlands were significant (p<0.05), while the difference of of phosphorus microbial biomass was not significant (p>0.05); (3) species richness index (H), evenness index (E), and carbon source utilization richness index (S) decreased in the order:Phragmites australis > Acorus calamus > Iris tectorum > Zizania caduciflora, and dominance indexes (Ds) decreased in the order:Phragmites australis > Acorus calamus > Zizania caduciflora > Iris tectorum; the differences in carbon source utilization richness indexes (S) of different constructed wetlands were significant (p<0.05), while differences in Ds of different constructed wetlands were not significant (p>0.05); (4) correlation analysis indicated that the microbial species richness indexes of different constructed wetlands were significantly positively correlated with SOC and TN; The correlation coefficients of reed wetland and calamus wetland were higher than those of water shoot wetland and iris wetland, indicating that the microbial community diversities of constructed reed and calamus wetlands of were higher than those of water shoot and iris wetlands; RDA analysis showes that soil environmental factors have obvious ecological gradients, and SOC and TN are the main environmental factors affecting the microbial community diversities of constructed wetlands.

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