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作为对白天和夜间温度升高的反应,大米产量和质量 - - 一个元分析的视角
Qiong Su1, Jai S Rohila2, Shyam Ranganathan3
1Department of Agricultural Sciences, Clemson University, SC 29634, USA.
The Science of the total environment
|July 9, 2023
概括
高夜间温度 (HNT) 比高白天温度 (HDT) 更严重地影响米的产量和质量. 种子设置率是最敏感的,导致显著的产量损失,并在热应激下影响谷物质量.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 气候变化的影响 气候变化的影响
背景情况:
- 全球气温上升和热压力对大米生产构成重大挑战.
- 了解温度与大米产量/质量之间的复杂关系对于粮食安全至关重要.
研究的目的:
- 调查白天高温 (HDT) 和夜间高温 (HNT) 对大米产量和谷物质量的影响.
- 建立温度,产量组件和质量特征之间的关系.
- 为了研究HDT和HNT反应中的表型可塑性.
主要方法:
- 从已发表的文献中对HDT的1105个实验和HNT的841个实验进行了元分析.
- 分析大米产量,产量组成部分 (子数,尖子数,种子设置率,谷物重量) 和谷物质量特征 (磨料产量,状,粉素,蛋白质).
主要成果:
- HNT对大米产量和质量的影响比HDT更为不利.
- 大米产量的最佳温度约为28°C (白天) 和22°C (夜晚).
- 每升高1°C,产量下降7% (HNT) 和6% (HDT);种植率最为敏感.
- HDT和HNT增加了状,减少了头米的百分比,影响了市场性.
- HNT显著影响了营养质量,例如蛋白质含量.
结论:
- HNT对大米生产的威胁比HTT更大.
- 种子设置率是热应激下产量损失的关键因素.
- 产量和质量都受到高温的负面影响,因此需要在育种计划中考虑耐热大米品种.
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