数字农科院2.0

Integrated Foliar Spraying Effectively Reduces Wheat Yield Losses Caused by Hot–Dry–Windy Events: Insights from High-Yield and Stable-Yield Winter Wheat Regions in China

文献类型： 外文期刊

作者： Oumeng Qiao;Buchun Liu;Enke Liu;Rui Han;Haoru Li;Huiqing Bai;Di Chen;Honglei Che;Yiming Zhang;Xinglin Liu;Long Chen;Xurong Mei

作者机构：

关键词： climate adaptation;difference-in-differences (DiD);integrated foliar spraying;irrigation management;sub-daily hot–dry–windy (HDW) events;yield stability

期刊名称： Agronomy

ISSN： 2073-4395

年卷期： 2025 年 15 卷 6 期

页码：

收录情况： SCIE（2025版）

摘要： Integrated foliar spraying has been proposed as an effective measure to mitigate the increasingly severe impacts of hot–dry–windy (HDW) events on winter wheat yield under ongoing climate change, and its physiological effectiveness has been mechanistically validated. However, there are still few quantitative assessments of the application of this technology at the regional scale. First, hourly meteorological data from the ERA5-Land reanalysis (1981–2020) were matched to the centroids of 599 counties within China’s major winter wheat-producing regions, allowing precise alignment with county-level yield data. Subsequently, spatial and temporal trends of sub-daily HDW events were analyzed. These HDW events were classified according to daily duration into three categories: short-duration (HDWsd1, 1 h d−1), moderate-duration (HDWsd2, 2–3 h d−1), and prolonged-duration (HDWsd3, 4–8 h d−1). Finally, a difference-in-differences (DiD) approach combined with panel matching methods was employed to quantitatively assess the effectiveness of integrated foliar spraying technology—comprising plant growth regulators, essential nutrients, fungicides, and insecticides—on wheat yield improvements under varying irrigation conditions. The results indicate that HDW is a major compound event threatening high-yield and stable-yield regions within the main winter wheat production areas of China, and in the study area, the annual average number of HDW days ranges from 3 to 13 days, increasing by 1–4 days dec−1. While HDW events continue to intensify, the integrated foliar spraying technology effectively mitigates yield losses due to HDW stress. Specifically, yield increases of up to 18–20% were observed in counties with sufficient irrigation infrastructure since the large-scale implementation began in 2012, particularly in regions exposed to more than 2 days of HDW stresses annually. However, the effectiveness of integrated foliar spraying was notably compromised in areas lacking adequate irrigation infrastructure, highlighting the necessity of reliable irrigation conditions. In these poorly irrigated areas, yield improvements remained limited and inconsistent, typically fluctuating around negligible levels. These findings underscore that robust irrigation infrastructure is pivotal to unlock the yield benefits of integrated foliar spraying technology, while also highlighting its transformative potential in advancing climate-smart agriculture globally—particularly in regions grappling with intensifying compound stress events driven by climate change, where this innovation could foster resilient and adaptive food systems to counter escalating environmental extremes.

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