Variation of chlorophyll content and chl a/b in leaves of soybean under doubled CO 2 concentration and O 3 concentration as well as their interactive effect were studied in open-top champers (OTC).

• 利用开顶箱 (OTC)法研究了在CO2 和O3 浓度倍增及其复合作用下 ,大豆叶片叶绿素含量及叶绿素a/b值的变化规律。