在不同的谷物填充阶段,温度对玉米产量影响的门和程度不同
Yixuan Wu1, Guangsheng Zhou2, Yanling Song2
1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, 210044 Nanjing, China; State Key Laboratory of Severe Weather, Hebei Gucheng Agricultural Meteorology National Observation and Research Station, Chinese Academy of Meteorological Sciences, 100081 Beijing, China.
The Science of the total environment
|February 7, 2024
概括
高温对谷物填充阶段的玉米产量有不同的影响. 了解这些温度值和热量积累对于优化玉米生产和在关键生长时期减轻热应激至关重要.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 植物生理学 植物生理学
背景情况:
- 温度是影响玉米产量的关键因素,特别是在谷物填充期间.
- 在不同的谷物填充阶段,玉米产量的特定温度值和灵敏度尚不清楚.
研究的目的:
- 为了研究不同时期的玉米粒填充的高温值和产量敏感性.
- 分析热量积累对黄海平原玉米产量的影响.
主要方法:
- 在2019-2022年期间,利用"丹958"玉米进行分阶段播种实验.
- 分析了河北和苏州农业气象站的数据,重点关注温度和产量参数.
- 在早期 (EP),主动 (AP) 和晚期 (LP) 谷物填充期间确定了高温门和热积累效应.
主要成果:
- 在谷物填充期间,最高温度门有所不同:EP>AP>LP,其中AP显示了最显著的温度差异.
- 谷物填充过程中的热量解释了超过80%的产量变化,影响了最大谷物填充速度持续时间 (Vmaxd) 和主动谷物填充周期持续时间 (DAP).
- 增长度日 (GDD) 是最重要的,但热度日 (HDD) 也至关重要,针对EP和AP确定了特定的HDD值.
结论:
- 不同的谷物填充阶段表现出不同的温度值,活跃填充期特别敏感.
- 热量积累,特别是在早期和活跃的谷物填充期间,显著影响玉米产量.
- 结果支持精确识别热应激,并根据情况调整玉米播种日期以提高产量.
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