研究论文
刘建栋,周秀骥,于强,颜鹏,郭建平,丁国安.近地层大气臭氧对水稻光合作用影响的数值模拟[J].环境科学学报,2003,23(3):289-294
近地层大气臭氧对水稻光合作用影响的数值模拟
- Simulation of the impact of ozone on rice canopy photosynthesis
- 基金项目：国家自然科学基金重大项目(批准号:49899270);中日合作“长江三角洲人类活动对生态系统的胁迫效应及响应机制”项目;中国科学院“百人计划”项目资助
- 作者
- 单位
- 刘建栋
- 中国气象科学研究院,北京 100081
- 周秀骥
- 中国气象科学研究院,北京 100081
- 于强
- 中国科学院地理科学与资源研究所,北京 100101
- 颜鹏
- 中国气象科学研究院,北京 100081
- 郭建平
- 中国气象科学研究院,北京 100081
- 丁国安
- 中国气象科学研究院,北京 100081
- 摘要：利用TE-49C型臭氧自动观测仪测定了常熟稻田上方O3浓度,并利用OTC-1型开顶式气室测定了O3浓度对水稻叶片光合速率的影响.在此基础上建立了O3对水稻冠层光合影响的数值模式,模式具有较高分辨率和准确度.观测表明:O3浓度逐时值变化幅度在0～160×10-9之间,而日平均值变化仅在5×10-9～60×10-9范围内;稻田上方O3存在高浓度单峰型和低浓度平缓型两种典型日变化.数值分析表明:全晴天时高浓度单峰型对光合日总量影响较大;随日总辐射量加大臭氧浓度增加对光合作用影响程度加强.全生育期积分表明:受O3影响水稻光合作用总损失量约为11.6%.
- Abstract：The O3 concentration above the rice paddy field was observed hour-by-hour with TE-49C ozone automonitor in Changshu. The impact of O3 on the rice leaf photosynthesis was measured in the OTC-1 open top chamber. Based on the observed parameters, a numerical model for simulating the impact of O3 on rice canopy photosynthesis was established. The results of O3 observation showed that there are two typical patterns of O3 diurnal variation in the Yangtze River Delta during rice growth periods, including the unimodal curve with high concentration and smooth variation curve with low concentration. The simulation result identified that the unimodal variation with high concentration has great impact on daily canopy photosynthesis, and the impact of O3 becomes more intense as radiation increased. The accumulated lost of photosynthesis is about 11.6% in the growth period under suitable moisture and fertilizer conditions.
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