Liu W L, Zhang C B, Han W J, Guan M, Liu S Y, Ge Y, Chang J
School of Civil Engineering and Architecture, Taizhou University, Jiaojiang, 318000, China.
School of Life Sciences, Taizhou University, Jiaojiang, 318000, China.
Bull Environ Contam Toxicol. 2017 Dec;99(6):748-752. doi: 10.1007/s00128-017-2207-2. Epub 2017 Nov 7.
To control potential fungal denitrification rate (PFDR) in vertical flow simulated wetlands (VFSW) microcosms, thirty VFSW microcosms were established and planted with three plant species richness levels (i.e. unplanted, monoculture, and four-species polyculture treatment), and effects of carbon, nitrogen and pH amendments on the PFDR were investigated using a room-incubating method. Among seven carbon compounds, sodium citrate, glycerol, glucose and sodium succinate were more effective in enhancing PFDRs. These enhanced effects were dependant on a given species richness level. Sodium nitrite mostly stimulated PFDRs to a greater extent than the other three nitrogen compound amendments at any richness level. Treatments with pH 5.6 or 8.4 had significantly greater PFDRs than the treatment with pH 2.8 in the three species richness levels. However, no effect of plant species richness on the PFDR was observed among any carbon, nitrogen and pH amendments. Current results suggest carbon, nitrogen and pH factors should be considered when mediating fungal denitrification in VFSW microcosms.
为了控制垂直流模拟湿地（VFSW）微观世界中的潜在真菌反硝化率（PFDR），建立了30个VFSW微观世界，并种植了三种植物物种丰富度水平（即无植物、单一种植和四种植物混种处理），并使用室内培养方法研究了碳、氮和pH值修正对PFDR的影响。在七种碳化合物中，柠檬酸钠、甘油、葡萄糖和琥珀酸钠在提高PFDR方面更有效。这些增强作用取决于特定的物种丰富度水平。在任何丰富度水平下，亚硝酸钠比其他三种氮化合物修正更能刺激PFDR。在三种物种丰富度水平下，pH值为5.6或8.4的处理的PFDR显著高于pH值为2.8的处理。然而，在任何碳、氮和pH值修正中，均未观察到植物物种丰富度对PFDR的影响。目前的结果表明，在调节VFSW微观世界中的真菌反硝化时，应考虑碳、氮和pH值因素。
