Assessment of yield and economic losses for wheat and rice due to ground-level O-3 exposure in the Yangtze River Delta, China

作者：Zhao, Hui^*; Zheng, Youfei; Wu, Xiaoyun

来源：Atmospheric Environment, 2018, 191: 241-248.

DOI：10.1016/j.atmosenv.2018.08.019

• AOT40
• Crop damage
• Wheat
• Rice
• Food security

In recent years, ground-level O-3 and its potential risks on agricultural crops have attracted worldwide attention from both society and academic community. According to the hourly O-3 concentration data in 24 cities of the Yangtze River Delta during wheat (16 March to 29 May 2015) and rice (20 July to 20 October 2015) growing seasons, we estimated the yield and economic losses of wheat and rice resulted by O-3 exposure using O-3 exposure-response functions based on AOT40 (accumulated hourly O-3 concentration above 40 ppb, this exposure index is the current standard for vegetation protection against O-3). The results showed that the O-3 mean concentration during wheat and rice growing seasons ranged from 28.2 to 44.3 ppb and 27.6-44.2 ppb, respectively. The AOT40 values during wheat and rice growing seasons ranged from 4.33 to 15.82 ppm h and 7.64-25.15 ppm h, respectively. Relative yield loss ranged from 9.86 to 36.05% for wheat and 7.25-23.87% for rice. The total crop production loss for wheat and rice amounted to 552.55 x 10(4) tons and 535.06 x 10(4) tons, respectively. The total economic loss amounted to 209.31 x 10(7) US$ for wheat and 237.03 x 10(7) US$ for rice. Our study revealed the potential regional risk of ground-level O-3 exposure to crops in the Yangtze River Delta. Therefore, some effective measures should be taken urgently to reduce the negative effects of O-3 on crop productivity.

• 出版日期2018-10
• 单位南京信息工程大学