| 腐殖质功能团酸解的常数: Ⅰ. 风化煤和暗黄土的富里酸和胡敏酸的电位数据的亲和光谱模型分析 |
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| 作者姓名： | DU Jin-Zhou CHANG Zheng ZHANG Zi-Ping TAO Zu-Yi LU Chang-Qing |
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| 作者单位： | ExperimentalStationforgroecologyandEnvironmentalTechnology,InstituteofGeopraphy,ChineseAcademyofScien |
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| 摘 要： | In order to study the influence of difference in C2H2 concentration on the production of CO2,N2O,NH4-N and volatile fatty acids(VFA).soil slurries with a gradient in C2H2 concentration were anaerobically incubated at 25℃ for 2 weeks.Acetate,butyrate and CO2 production and NH4-N accumulation were inhibited in the slurres in the presence of C2H2;and the inhibition effect increased with increasing C2H2 from 0 to 20 kPa in the headspace gas of the incubation bottle.However,N2O,isobutyrate and propionate production was not obviously different among the slurres amended with C2H2 from 2.5 to 20 kPa.Therefore,the results implied that the C2H2 did not promote the inhibition but only increased the side effect on other microbial processes.The C2H2 of 2.5 kPa was suggested to be the optimum choice for the present denitrification study.
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| 关 键 词： | 厌氧培养土壤泥浆 反硝化作用 微生物过程 乙炔浓度 |
Effect of Acetylene Concentration on Denitrification and Related Microbial Processes in Anaerobically Incubasted Soil Slurries |
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| DU Jin-Zhou,CHANG Zheng,ZHANG Zi-Ping,TAO Zu-Yi,LU Chang-Qing.Effect of Acetylene Concentration on Denitrification and Related Microbial Processes in Anaerobically Incubasted Soil Slurries[J].Pedosphere,1996,6(3):201-208. |
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| Authors: | DU Jin-Zhou CHANG Zheng ZHANG Zi-Ping TAO Zu-Yi and LU Chang-Qing |
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| Institution: | ExperimentalStationforgroecologyandEnvironmentalTechnology,InstituteofGeopraphy,ChineseAcademyofScien |
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| Abstract: | Potentiometric experiments were carried out on the proton binding equilibria of FA extracted from a weathered coal and HA and FA extracted from a dark loessial soil. The affinity spectrum model was employed to treat the experimental data. The affinity spectrum model technique could "magnify" the heterogeneity of the proton binding equilibria, so it was useful for comparing and studying the characteristics of humic substances with similar properties. According to the affinity spectra, we also found that the direction of the titration could affect the properties of the equilibria of FA from the weathered coal, and the acidic functional groups contained in FA from the weathered coal were larger in quantity than those contained in HA and FA from the dark loessial soil. |
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| Keywords: | affinity spectrum heterogeneity humic substances potentiometric titration |
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