在世界主要生产地区之间,小麦对高O3度的产量反应有所不同
Yansen Xu1, Kazuhiko Kobayashi2, Zhaozhong Feng1
1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing, China; Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), Nanjing University of Information Science & Technology, Nanjing, China.
The Science of the total environment
|October 26, 2023
概括
地平面臭氧 (O3) 的上升威胁着全球小麦供应,其中包括亚洲.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 植物科学 植物科学
背景情况:
- 全球地下臭氧 (O3) 度正在增加,特别是在亚洲.
- 小麦对臭氧高度敏感,对全球粮食安全构成重大威胁.
- 亚洲生产了世界上大部分的小麦.
研究的目的:
- 为了估计臭氧暴露 (AOT40) 和主要生产地区相对小麦产量之间的关系.
- 为了确定小麦产量由于臭氧而损失的区域差异.
- 调查导致这些区域差异的因素.
主要方法:
- 利用了来自中国,印度,欧洲和北美臭氧升高实验的数据.
- 使用AOT40计算的臭氧剂量 (90天内累积的白天O3度超过40ppb).
- 分析了产量损失的成分 (谷物重量,谷物数量),并考虑了栽培年龄和区域气候因素.
主要成果:
- 由于臭氧造成的小麦产量损失在中国最大,其次是印度,欧洲和北美.
- 在中国,欧洲和北美,降低谷物重量是产量损失的主要原因.
- 在印度,粮食数量减少对产量损失的贡献比粮食重量减少更大.
结论:
- 臭氧引起的小麦产量损失的区域差异很大,并且受到臭氧度以外的因素的影响.
- 品种年龄起着关键作用,北美较老的品种表现出较少的敏感性.
- 准确量化臭氧引起的产量损失需要特定区域的剂量反应模型,包括气候和品种的变化.
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