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夏季玉米的热应激变化及其对循环指数的反应

Jin Huang¹, Fang-Min Zhang¹

¹Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/School of Ecology and Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China.

Ying yong sheng tai xue bao = The journal of applied ecology

|May 16, 2025

概括

了解热应激对夏季玉米的影响对于气候适应至关重要. 该研究发现,最大累积热度度日 (MHDD) 最好量化热应激,太平洋热池指数预测其发生.

科学领域:

农业气象农业气象学
气候科学气候科学
植物生理学作物生理学

背景情况:

气候异常显著影响夏季玉米种植.
热应激对农业生产率构成重大威胁.
了解大型循环指数 (LSCI) 与热应激之间的联系对于缓解至关重要.

研究的目的:

为了确定热应激和夏季玉米的LSCI之间的联系.
评估极端温度指数以量化热应力.
分析热应激及其前体的时空特征.

主要方法:

分析每日最高气温和夏季玉米产量数据 (1980-2019).
对9个极端温度指数的评估,包括32°C的最大累积热度日 (MHDD) 的评估.
主要组件分析和时间滞后与LSCI的相关性.

主要成果:

在32°C的MHDD有效地捕捉了玉米生长期间的热应激.
热应激强度显示了一个南向北的空间模式,从南向北的空间模式下降.
在中心研究区域观察到热应激的强化趋势.
太平洋温水池指数成为热应激的主要前体信号.

结论:

MHDD是评估夏季玉米种植热应激的一个关键指标.
LSCI,特别是太平洋温水池指数,可用于预测热应激事件.
这些发现有助于制定适应气候变化的农业战略.

关键词:

热应激是一种热应激.大规模的流通指数.主要组件分析的主要组件分析夏季玉米 - 夏季玉米

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