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| Variation and spatio-temporal evolution of stomatal ozone uptake flux of soybean leaf under the climatic conditions |
| ZHAO Hui1,2, ZHENG You-fei1,2,3, WEI Li3, GUAN Qing3, HUANG Yun4, CAO Jia-chen3 |
1. Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China;
3. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044, China;
4. Shanghang Meteorological Administration, Shanghang 364200, China |
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Abstract The Open-Top Chamber is used to make field experiment, it is expected to obtain the data including temperature, light radiation, water vapor pressure difference and stomatal conductance by continuous observation. Stomatal conductance model is used and parameterized, combined with the ozone absorption flux model, we studied the characteristics of stomatal ozone fluxesof soybean. Meanwhile, the variations of stomatal conductance and ozone absorption fluxes of soybean were calculatedin Jiangsu province. Results show that the parameterized Jarvis model is applicable tothe simulation of stomatal conductance in soybean. Approximately 82% variation of measured stomatal conductance could be explained by the stomatal conductance model. In the experiment, the total ozone absorption flux in ozone concentration of CK, 100nL/L, 150nL/L was 14.46mmol/m2, 15.86mmol/m2, and 16.69mmol/m2, respectively. The ozone concentration gradually increased from early period to late period during the period of soybean growth in Jiangsu. Average stomatal conductance is the early stage > the middle stage > the later stage. Ozone cumulative absorption flux is the most during the early stage. This study will provide a reference for the future study of effects of ozone on crops, and can also be used as the theory basis for the government and international organizations formulate policies, laws and regulations.
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Received: 08 October 2016
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