A stomatal ozone flux-response relationship to assess ozone-induced yield loss of winter wheat in subtropical China.
A stomatal ozone flux-response relationship to assess ozone-induced yield loss of winter wheat in subtropical China.
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DOI：
10.1016/j.envpol.2012.01.014
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发表时间：
2012-05
影响因子：
8.9
通讯作者：
Zhaozhong Feng;Haoye Tang;J. Uddling;H. Pleijel;K. Kobayashi;Jianguo Zhu;H. Oue;Wenshan Guo
中科院分区：
文献类型：
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作者：
Zhaozhong Feng;Haoye Tang;J. Uddling;H. Pleijel;K. Kobayashi;Jianguo Zhu;H. Oue;Wenshan Guo
建立了冬小麦(Triticum aestivum L.)气孔臭氧通量及其响应关系。在完全露天臭氧熏蒸下种植。对欧洲小麦气孔导度(GSTO)模型进行了重新参数化。与欧洲模式的参数化相比，主要的变化是VPD和辐射响应函数分别被减少和更多的限制，并且省略了温度函数。重新参数化的模型表现良好，r2值为0.76。回归的斜率和截距在1~0之间无显著差异。冬小麦吸收臭氧的阈值为12nmolm−2s−1，对亚热带地区中国小麦的通量响应关系最为合理。从通量和浓度的关系来看，被调查的品种似乎比欧洲品种对臭氧更敏感。新的通量-响应关系可用于亚热带地区臭氧风险评估。
Stomatal ozone flux and flux–response relationships were derived for winter wheat (Triticum aestivum L.) grown under fully open-air ozone fumigation. A stomatal conductance (gsto) model developed for wheat in Europe was re-parameterized. Compared to European model parameterizations, the main changes were that the VPD and radiation response functions were made less and more restrictive, respectively, and that the temperature function was omitted. The re-parameterized gstomodel performed well with an r2value of 0.76. The slope and intercept of the regression between observed and predicted gstowere not significantly different from 1 to 0, respectively. An ozone uptake threshold of 12 nmol m−2s−1was judged most reasonable for the wheat flux–response relationship in subtropical China. Judging from both flux- and concentration-based relationships, the cultivars investigated seem to be more sensitive to ozone than European cultivars. The new flux–response relationship can be applied to ozone risk assessment in subtropical regions.