| 苏打盐碱土对氮转化的影响 |
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| 引用本文： | 张先富,李卉,洪梅,宋博宇,张福全,梁爽.苏打盐碱土对氮转化的影响[J].吉林大学学报(地球科学版),2012,42(4):1145-1150. |
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| 作者姓名： | 张先富 李卉 洪梅 宋博宇 张福全 梁爽 |
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| 作者单位： | 吉林大学地下水资源与环境教育部重点实验室,长春130021 |
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| 基金项目： | 国家自然科学基金项目(41102146);国家水体污染控制与治理科技重大专项课题(2008ZXD7207-006-02) |
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| 摘 要： | 以苏打盐碱土中的主要成分NaHCO3作为主要影响因素，通过室内培养方法，研究不同苏打盐碱化条件对氮的吸附、矿化、硝化及反硝化作用的影响。结果表明，在不同NaHCO3质量浓度影响下：NH+4-N吸附符合Langmuir吸附等温式；矿化模型符合一阶动力学方程，随着NaHCO3质量浓度的增大，潜在矿化势(M0)和矿化速率常数(km)分别由358.48 mg/kg和0.088 d-1降低到337.08 mg/kg和0.059 d-1；硝化作用符合“S”形曲线模型，随着NaHCO3质量浓度的增大，最大速率（kmax）由22.56 mg/(kg·d)降低到16.68 mg/(kg·d)；反硝化作用符合零阶动力学方程，但NaHCO3与Na2CO3混合质量浓度变化对反硝化速率常数(kd)影响不显著。随着NaHCO3质量浓度的增大，苏打盐碱土中NH+4-N吸附、有机氮矿化和硝化作用均受到抑制。
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| 关 键 词： | 苏打盐碱土 氮 吸附作用 硝化作用 反硝化作用 动力学 |
| 收稿时间： | 2011-10-08 |
Effects of Saline-Alkali Soil on Nitrogen Transformations |
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| Zhang Xian-fu,Li Hui,Hong Mei,Song Bo-yu,Zhang Fu-quan,Liang Shuang.Effects of Saline-Alkali Soil on Nitrogen Transformations[J].Journal of Jilin Unviersity:Earth Science Edition,2012,42(4):1145-1150. |
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| Authors: | Zhang Xian-fu Li Hui Hong Mei Song Bo-yu Zhang Fu-quan Liang Shuang |
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| Institution: | Key Laboratory of Groundwater Resources and Environment, Ministry of Education,Jilin University,Changchun130021,China |
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| Abstract: | The main component NaHCO3 was considered as the main factor in Soda saline-alkali soil in order to study the effects of different soda salinization levels on nitrogen adsorption,mineralization,nitrification and denitrification by using laboratory incubation.The results showed that in the experimental conditions with the different NaHCO3 concentrations,the NH+4-N adsorptions obeyed Langmuir linear adsorption isotherm,while,the N mineralization could be described by the first-order kinetic equation.With the increasing of NaHCO3 concentration,the N mineralization potential(M0) and mineralization rate constant(km) decreased from 358.48 mg/kg and 0.088 d-1 to 337.08 mg/kg and 0.059 d-1,respectively,and the nitrification could be described by "S" curve model,the maximal rate of nitrification(kmax) decreased from 22.56 to 16.68 mg/(kg·d);the denitrification obeyed zero-order kinetic equation,and there was no significant effect of mixed concentrations variation of NaHCO3 and Na2CO3 on the denitrification rate constant(kd).NH+4-N adsorption,organic nitrogen mineralization and nitrification were inhibited with NaHCO3 concentrations increasing in soda saline-alkali soil. |
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| Keywords: | soda saline-alkali soil nitrogen adsorption nitrification denitrification kinetics |
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