Abstract:Uptake 14CO2 from air and accumulation of 14C in broadbean-soil system were studied by using the isotope-tracer techniques, which was used to get a better understanding of the environmental behavior of 14CO2. The 14CO2, which was absorbed from the air by the leaf photosynthesis of broadbean, would be sent to the other parts of the broadbean and form a accumulating trend. 14C specific activity was detected high, which demonstrated 14CO2 in the air easily got into every tissue of broadbean through photosynthesis. The specific activity of 14C in every tissue increased linearly with time. And the increasing rate was within the range from 20.3 to 45.1 Bq/(g·d). The order of the rate in tissues was as below: leaf blade >stalk> root >husk>seed. The broadbean had an intensive concentration of 14CO2. The concentration factor values increased rapidly with time, and those in the leaf blade reach the highest level(31.61 in 56 days) and followed by the husk (25.54 in 56days). Owing to its high accumulation of 14CO2, the broadbean could be used as the indicator plant in the supervisor of 14CO2 air pollution.
史建君. 蚕豆-土壤系统对14CO2的吸收和积累[J]. 中国环境科学, 2012, 32(1): 120-124.
SHI Jian-Jun. Uptake 14CO2 from air and accumulation of 14C in broadbean-soil system. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(1): 120-124.