Carbonyl sulfide and dimethyl sulfide fluxes in an urban lawn and adjacent bare soil in Guangzhou,China  

作　　者：Zhigang Yi Xinming Wang 

机构地区：[1]College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. E-mail:[e-mail] [2]State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

出　　处：《Journal of Environmental Sciences》2011年第5期784-789,共6页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 40821003, 40971260);the Foundation for University by the Fujian Provincial Department of Science and Technology (No. 2008F5013)

摘　　要：Carbonyl sulfide （COS） and dimethyl sulfide （DMS） fluxes from as urban Cynodon dactylon lawn and adjacent bare soil were measured during April-July 2005 in Guangzhou, China. Both the lawn and bare soil acted as sinks for COS and sources for DMS. The mean fluxes of COS and DMS in the lawn （-19.27 and 18.16 pmol/（m^2.sec）, respectively） were significantly higher than those in the bare soil （-9.89 and 9.35 pmol/（m^A2.sec）, respectively）. Fluxes of COS and DMS in mowed lawn were also higher than those in bare soils. Both COS and DMS fluxes showed diurnal variation with detectable but much lower values in the nighttime than in the daytime. COS fluxes were related significantly to temperature and the optimal temperature for COS uptake was 29℃. While positive linear correlations were found between DMS fluxes and temperature. COS fluxes increased linearly with ambient COS mixing ratios, and had a compensation point of 336 ppt.Carbonyl sulfide （COS） and dimethyl sulfide （DMS） fluxes from as urban Cynodon dactylon lawn and adjacent bare soil were measured during April-July 2005 in Guangzhou, China. Both the lawn and bare soil acted as sinks for COS and sources for DMS. The mean fluxes of COS and DMS in the lawn （-19.27 and 18.16 pmol/（m^2.sec）, respectively） were significantly higher than those in the bare soil （-9.89 and 9.35 pmol/（m^A2.sec）, respectively）. Fluxes of COS and DMS in mowed lawn were also higher than those in bare soils. Both COS and DMS fluxes showed diurnal variation with detectable but much lower values in the nighttime than in the daytime. COS fluxes were related significantly to temperature and the optimal temperature for COS uptake was 29℃. While positive linear correlations were found between DMS fluxes and temperature. COS fluxes increased linearly with ambient COS mixing ratios, and had a compensation point of 336 ppt.

关 键 词：carbonyl sulfide dimethyl sulfide FLUX urban lawn 

分 类 号：S688.4[农业科学—观赏园艺] O623.121[农业科学—园艺学]