【摘要】 利用静态箱法研究了秋季羰基硫 (COS)在六种北京常见树种与大气间的交换 .结果表明 :法国梧桐、槐树、龙爪槐、玉兰、柳树对COS有吸收 ,油松没有吸收 .树木与大气间COS的交换通量受树种、环境温度、光照、COS初始浓度等因素的影响 .一般来说 ,温度高、光照强时 ,以上树种与大气间COS的交换强 ;空气中COS初始浓度高时 ,植物对COS的吸收通量高 .植物对COS的吸收达到饱和较植物对CO2 的吸收以及异戊二烯的排放持续时间长更多还原

【Abstract】 The exchanging fluxes of carbonyl sulfide(COS)were investigated by using static method for 6 tree species in Beijing city in fall.The uptake of COS by Platanus orientalis,Sophora japonica,Pendula loud,Magnolia denudata and Salix babylonica were obvious,whereas Pinus tabulaeformis had no exchange.The exchange rates of COS were determined by air temperature,light,and ambient concentration of COS.The exchanging fluxes were high when air temperature and ambient concentration of COS were high as well as light was strong.The COS exchange occurred over a larger fraction of the day under natural conditions than is the case for CO 2 assimilation and isoprene emission.更多还原