实验性变暖增加了三大中国大米作物系统中的米粘度和大米热稳定性
Huifang Yang1,2, Liming Chen3, Ruoyu Xiong4
1Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.
Foods (Basel, Switzerland)
|June 19, 2024
概括
气候变暖使米的粘度增加了16.3%,并改变了米粉的热性能. 米成分和粉结构的这些变化提高了米的粘性和热稳定性.
科学领域:
- 农业科学 农业科学
- 食品科学 食品科学 食品科学
- 气候科学 气候科学
背景情况:
- 气候变暖对全球大米生产构成重大威胁.
- 变暖对米质感和热性质的影响尚不清楚,尤其是在中国.
- 米是世界上很大一部分人口的主要食物.
研究的目的:
- 调查气候变暖对中国主要大米种植系统中米质感和热性质的影响.
- 在变暖条件下分析大米成分的变化,包括粉和蛋白质含量,以及粉结构.
- 为了确定气候变暖引起的变化和大米质量的变化之间的相关性.
主要方法:
- 一个为期两年的多个地点的现场变暖实验是使用自由空气温度增加设施进行的.
- 分析了米的质地 (硬度,粘度) 和米粉的热性能 (凝化度,温度).
- 确定了米的成分 (粉,蛋白质含量) 和粉结构 (相对结晶度,脱枝粉重量分布).
主要成果:
- 加热对米硬度的影响很小,但显著增加了粘度16.3%.
- 米粉显示凝化度增加,在变暖下开始,达到峰值和结束温度.
- 变暖降低了粉糖含量,增加了蛋白质含量和相对结晶性,改变了粉脱枝.
结论:
- 气候变暖显著改变米的质地,主要是通过增加粘性.
- 变暖影响米粉的热性质,并改变关键的组成和结构属性.
- 该研究强调了气候变暖对大米质量的复杂影响,对粮食安全和农业实践产生影响.
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