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作者	单位	地址
何世佳	山西农业大学草业学院	山西省晋中市太谷区山西农业大学
贾晓怡
刘鹏
成华强
杨轩^*	山西农业大学草业学院草地生态保护与乡土草种质创新山西省重点实验室山西右玉黄土高原草地生态系统定位观测研究站	山西省晋中市太谷区山西农业大学

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中文摘要:

为探讨未来气候变化条件下燕麦稳产和获取更多主栽作物季后气候资源，基于APSIM（agricultural production systems simulator）作物模型，经调整将晋北地区朔州等6个地点播期不同程度提前，模拟评估了在不同气候情景下饲用燕麦的产草量及剩余气候资源对播期调整的响应。结果表明，在未来气候变暖背景下，适度早播（S1，提前10 d）可在主茬产草量无显著损失的前提下，显著增加收获后至霜冻前的气候资源，剩余积温（1200-1800℃·d）降水（55-188mm）辐射量（861-1523 MJ·m-2），从而提高气候资源利用效率。尽管早播对产草量的直接影响较小，但其在稳定性与资源增效方面表现优异，总体来说，适时早播是应对气候变暖、提升资源利用效率的有效田间管理措施。

英文摘要:

To explore the stable yield of oats under future climate change conditions and to capture more climatic resources after the main crop season, based on the Agricultural Production Systems Simulator (APSIM) crop model, the sowing dates were adjusted to different degrees of advancement at six locations including Shuozhou in northern Shanxi. The responses of forage oat yield and residual climatic resources to sowing date adjustments under different climate scenarios were simulated and evaluated. The results show that under future climate warming, moderate early sowing (S1, advanced by 10 days) can significantly increase the climatic resources available after harvest and before the first frost, including accumulated thermal time (1200–1800°C·d), precipitation (55–188 mm), and solar radiation (861–1523 MJ·m?2), without significantly reducing the main-season forage yield. Consequently, the utilization efficiency of climatic resources is improved. Although early sowing has a limited direct effect on forage yield, it demonstrates excellent performance in terms of yield stability and resource enhancement. Overall, appropriately advancing sowing dates is an effective field management strategy for adapting to climate warming and enhancing resource use efficiency.

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