• 关键词：挥发性含硫气体  硫酸二乙酯  水稻土  释放  硫循环  大气环境

• 基金项目：国家自然科学基金(批准号:29677007);瑞典国际科学基金(IFS;批准号:H/2409-1)资助项目

• 张晋华
• 南京理工大学环境科学与工程系, 南京 210094

• 王连军
• 南京理工大学环境科学与工程系, 南京 210094

• 刘越
• 南京理工大学环境科学与工程系, 南京 210094

• 席淑琪
• 南京理工大学环境科学与工程系, 南京 210094

• 赵宝昌
• 南京理工大学环境科学与工程系, 南京 210094

• 杨震
• 南京理工大学环境科学与工程系, 南京 210094

• 摘要：为了探讨水稻土中含硫气体产生和释放的途径, 在室内培养条件下, 测定了南京水稻土中含硫气体的释放.结果从该淹水土壤中测出3种含硫气体;硫化氢(H₂S), 羰基硫(COS)和二甲基硫(DMS)气体.当土壤中加入硫酸二乙酯后, 不仅上述3种气体的释放量增加了, 而且还明显测出甲硫醇(CH₃SH)和二硫化碳(CS₂).据此推测, 水稻土中硫酸二乙酯的分解可能是CH₃SH、CS₂、COS、H₂S、DMS5种气体产生释放的来源之一.在好氧条件(普通大气)下:(1)H₂S和COS的释放量低于厌氧条件(充氮).(2)CS₂和CH₃SH的释放量高于厌氧条件.(3)DMS的释放量不受空气中氧气含量的影响.分析了培养前后土壤pH和Eh的变化和影响.

• Abstract：In order to investigate sulfur gas the production and emission of sulfur gases in paddy soil, ethyl sulfate was added to incubated Chinese paddy soil, and the emission of sulfur gases was determined. Three sulfur gases, hydrogen sulfide (H₂S), carbonyl sulfide (COS) and dimethyl sulfide (DMS), were detected from waterlogged soil. When ethyl sulfate was added, the concentrations of these gases and carbon disulfide (CS₂) and methyl merthyl mercaptan(CH₃SH)increased significantly. It is suggesed that the reduction of ethyl sulfate in paddy soil may be a source of the 5 volatile sulfur gases. Under aerobic conditions (ambient atmosphere), the results showed that:1) the emissions of H₂S and COS were lower than un der anaerobic condition (nitrogen atmosphere);2) the emissions of CS₂ and CH₃SH were higher than under anaerobic condition; 3) The emissions of DMS were not influenced by the oxygen content of the air. The influences and change of soil pH and E h were investigated.

• Key words：volatile sulfur gases  ethyl sulfate  paddy soil  emission  sulfur cycle  atmospheric environment

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