| 印亮,张丽丽,陈鹭,王贤凤,黄幸然,方熊,易志刚.不同环境因子对南方典型蔗田土壤羰基硫通量的影响[J].农业环境科学学报,2017,36(12):2493-2499. |
| 不同环境因子对南方典型蔗田土壤羰基硫通量的影响 |
| Effects of various environmental factors on carbonyl sulfide fluxes from typical sugarcane field soils in southern China |
| 投稿时间：2017-05-08 |
| DOI：10.11654/jaes.2017-0666 |
| 中文关键词: 羰基硫 原位土 异位土 环境因子 蔗田土壤 |
| 英文关键词: carbonyl sulfide intact soils disturbed soils environment factors sugarcane field soils |
| 基金项目:国家自然科学基金项目（41173090，JA12087，41473083） |
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| 摘要点击次数: 1906 |
| 全文下载次数: 2396 |
| 中文摘要: |
| 为探讨全球气候变化对土壤羰基硫（COS）的影响，本研究以南方典型蔗田土壤作为研究对象，室内模拟不同环境因子（温度、含水率和大气CO2浓度），利用动态箱/GC-MS分析了原位和异位土壤COS通量。结果表明，土壤原位土和异位土COS通量差异较大，原位土COS吸收速率小于异位土，而释放速率大于异位土。土壤灭菌后COS的吸收显著降低，表明土壤COS吸收是一个生物过程。温度对异位土壤COS吸收影响较大，25℃异位土壤COS吸收最小，为100.4 pmol·m-2·s-1；土壤含水量对原位土壤COS吸收影响最大，50%的土壤最大持水量条件COS吸收最小，为0.9 pmol·m-2·s-1；大气CO2浓度增加抑制原位土释放COS。因此，在研究土壤COS通量时，需综合考虑土壤结构、土壤温湿度和大气CO2浓度的影响。 |
| 英文摘要: |
| This study aimed to better understand the influence of global climate change on soil carbonyl sulfide (COS). Dynamic chamber and gas chromatography-mass spectrometry methods were used to investigate the effects of various environmental factors (i.e. temperature, soil water content and carbon dioxide (CO2) concentrations) on soil COS fluxes under laboratory conditions. Soil cores were collected from typical sugarcane fields in south China. Parts of the soil cores were collected without disturbance (i.e., intact soil cores), whereas the remaining were broken and mixed after passing through an 8-mm mesh sieve (i.e., disturbed soil cores). The results showed that COS fluxes from the intact soils were significantly different from those of the disturbed soils. The COS emission rates from intact soils were higher than those from the disturbed soils, whereas the COS uptake rates showed an inverse pattern. COS uptake rates were reduced remarkably after sterilization, indicating that they were mainly controlled by biological processes. Temperature significantly influenced the COS fluxes of disturbed soils, and the lowest COS uptake rate (100.4 pmol·m-2·s-1) occurred at 25℃. Soil water content significantly affected the COS fluxes in intact soils, and the lowest COS uptake rate (0.9 pmol·m-2·s-1) occurred at 50% water holding capacity. High ambient CO2 concentration (8520 mg·m-3) inhibited COS emission from intact soils. The results suggested that the effects of soil structure, temperature, humidity, and ambient CO2 concentration should be considered when estimating the global soil COS fluxes. |
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