Department of Crop Sciences, University of Illinois at Urbana Champaign, Urbana, IL, USA.
Global Change and Photosynthesis Research Unit, USDA-ARS, Urbana, IL, USA.
Sci Rep. 2022 Oct 29;12(1):18218. doi: 10.1038/s41598-022-23237-2.
Crop production is sensitive to anomalous weather conditions, but vegetable crops can be highly sensitive to environmental changes. Using sweet corn data collected on 16,040 fields over a 27-year period, we: (a) estimate yield sensitivities to changes in growing season temperature and total precipitation, (b) estimate critical thresholds in non-linear temperature effects on sweet corn yield across diverse environments, and (c) quantify yield losses from surpassing the upper temperature threshold during anthesis in sweet corn. Our results show growing-season temperatures exceeding 30 [Formula: see text] were detrimental to crop yield. Each additional degree day spent above 30 [Formula: see text] during anthesis reduced crop yields by 0.5% and 2% in irrigated and rainfed fields, respectively. This study shows evidence for sweet corn yield losses across broad spatial domains in the wake of climate change and underscores the urgency to accelerate crop adaptation strategies to sustain production of this highly popular crop.
农作物生产对异常天气条件敏感，但蔬菜作物对环境变化可能高度敏感。我们利用在 27 年期间收集的 16040 个田地的甜玉米数据：(a) 估计产量对生长季节温度和总降水量变化的敏感性，(b) 估计不同环境下甜玉米产量非线性温度效应的临界阈值，以及 (c) 量化在甜玉米开花期超过上限温度阈值时的产量损失。我们的结果表明，生长季节温度超过 30°C 对作物产量有害。在开花期每增加 1 度，灌溉和雨养田地的作物产量分别减少 0.5%和 2%。本研究表明，气候变化后，在广泛的空间范围内都有甜玉米产量损失的证据，这凸显了加快作物适应策略以维持这种广受欢迎的作物生产的紧迫性。
