【摘要】：為探討全球氣候變化對(duì)土壤羰基硫(COS)的影響,本研究以南方典型蔗田土壤作為研究對(duì)象,室內(nèi)模擬不同環(huán)境因子(溫度、含水率和大氣CO_2濃度),利用動(dòng)態(tài)箱/GC-MS分析了原位和異位土壤COS通量。結(jié)果表明,土壤原位土和異位土COS通量差異較大,原位土COS吸收速率小于異位土,而釋放速率大于異位土。土壤滅菌后COS的吸收顯著降低,表明土壤COS吸收是一個(gè)生物過(guò)程。溫度對(duì)異位土壤COS吸收影響較大,25℃異位土壤COS吸收最小,為100.4 pmol·m~(-2)·s~(-1);土壤含水量對(duì)原位土壤COS吸收影響最大,50%的土壤最大持水量條件COS吸收最小,為0.9 pmol·m~(-2)·s~(-1);大氣CO_2濃度增加抑制原位土釋放COS。因此,在研究土壤COS通量時(shí),需綜合考慮土壤結(jié)構(gòu)、土壤溫濕度和大氣CO2濃度的影響。
[Abstract]:In order to study the effect of global climate change on soil carbonyl sulfur (COS), the soil of typical sugarcane field in southern China was used as the research object, and different environmental factors (temperature, temperature) were simulated in laboratory. In situ and ectopic soil COS fluxes were analyzed by dynamic chamber / GC-MS. The results showed that the COS fluxes of in-situ soil and heterotopic soil were significantly different. The COS absorption rate of in-situ soil was lower than that of heterotopic soil, but the release rate of COS was higher than that of heterotopic soil. The absorption of COS was significantly decreased after soil sterilization, indicating that the absorption of COS in soil was a biological process. The effect of temperature on the absorption of COS in heterotopic soil was greater than that in 25 鈩，

本文編號(hào)：2120904