A comparison of North American and Asian exposure-response data for ozone effects on crop yields

作者：Emberson L D^*; Bueker P; Ashmore M R; Mills G; Jackson L S; Agrawal M; Atikuzzaman M D; Cinderby S; Engardt M; Jamir C; Kobayashi K; Oanh N T K; Quadir Q F; Wahid A

来源：Atmospheric Environment, 2009, 43(12): 1945-1953.

DOI：10.1016/j.atmosenv.2009.01.005

• Ozone
• Crop yield
• Asia
• Rice
• Wheat
• Soybean
• Food security

Modelling-based studies to assess the extent and magnitude of ozone (O-3) risk to agriculture in Asia suggest that yield losses of 5-20% for important crops may be common in areas experiencing elevated O-3 concentrations. These assessments have relied on European and North American dose-response relationships and hence assumed an equivalent Asian crop response to O-3 for local cultivars, pollutant conditions and climate. To test this assumption we collated comparable dose-response data derived from fumigation, filtration and EDU experiments conducted in Asia on wheat. rice and leguminous crop species. These data are pooled and compared with equivalent North American dose-response relationships. The Asian data show that at ambient O-3 concentrations found at the study sites (which vary between similar to 35-75 ppb 4-8 h growing season mean), yield losses for wheat, rice and legumes range between 5-48, 3-47 and 10-65%, respectively. The results indicate that Asian grown wheat and rice cultivars are more sensitive to O-3 than the North American dose-response relationships would suggest. For legumes the scatter in the data makes it difficult to reach any equivalent conclusion in relative sensitivities. As such, existing modelling-based risk assessments may have substantially underestimated the scale of the problem in Asia through use of North American derived dose-response relationships.

• 出版日期2009-4