评估热应激对棉花产量和收入的影响:美国南部的多水平回归方法

Oduniyi Oluwaseun Samuel, McCallister Donna, Gao Long, Bastos Leonardo, Jagadish S. V. Krishna
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引用次数: 0

摘要

气候变化引起的热应激严重威胁着美国南部的棉花生产,减少了产量和农业收入。本研究使用多层回归模型对主要棉花产区的历史气候和产量数据(1980-2018)进行量化。分析考察了最高和最低温度、降水和生长日数对不同生育期产量的影响。结果表明,花期最高温度(TmaxGS2)每升高1°C,棉花产量就会下降5.5%,导致每英亩收入损失高达219美元。相反,在关键生长期,较高的降水量可使产量增加183磅/英亩,部分抵消了热胁迫的影响。鉴于这些发现,适应策略是必不可少的。我们建议开发耐热棉花品种,改善灌溉管理,扩大财政支持计划,包括基于气候的作物保险。此外,优化种植计划和采用精准农业有助于减少产量损失。这些措施将增强棉花种植业对不断升级的气候风险的抵御能力,确保长期可持续性。这项研究为致力于在气候变化中保护棉花生产的农民、政策制定者和研究人员提供了宝贵的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessing Heat Stress Impacts on Cotton Yield and Revenue: A Multilevel Regression Approach in the Southern U.S.

Climate change-induced heat stress significantly threatens cotton production in the Southern United States, reducing yields and farm revenue. This study quantifies the impact of rising temperatures using a multilevel regression model applied to historical climate and yield data (1980–2018) from key cotton-growing regions. The analysis examines how maximum and minimum temperatures, precipitation, and growing degree days influence yield at different growth stages. Results show that a 1°C increase in maximum temperature during the flowering stage (TmaxGS2) reduces cotton yield by 5.5%, leading to revenue losses of up to $219 per acre. Conversely, higher precipitation during critical growth periods increases yield by 183 lb/acre, partially offsetting heat stress effects. Given these findings, adaptation strategies are essential. We recommend the development of heat-tolerant cotton varieties, improved irrigation management, and expanded financial support programmes, including climate-based crop insurance. Additionally, optimising planting schedules and adopting precision agriculture can help mitigate yield losses. These measures will strengthen the resilience of cotton farming against escalating climate risks, ensuring long-term sustainability. This study provides valuable insights for farmers, policymakers, and researchers working to safeguard cotton production in a changing climate.

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