Tradeoff between forage yield and nitrogen utilization under double-cropped and regenerated oat managements: a case study in northern China

文献类型： 外文期刊

第一作者： Zhao, Xinyao

作者： Zhao, Xinyao;Wang, Ying;Wang, Xingyu;Han, Li;Yang, Jinhu;Zhang, Hongjie;Wu, Xiaorong;Wang, Xiquan;Li, Lijun;Wang, Xingyu;Zhang, Yanli

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关键词： Avena sativa L.; Double-cropped; Forage yield; Water use efficiency; Nitrogen use efficiency; Soil nitrogen content

期刊名称：PLANT AND SOIL （ 影响因子：4.1； 五年影响因子：4.7 ）

ISSN： 0032-079X

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Background and aimsDouble-cropped and regenerated crop managements have great potential to increase oat forage production through efficient utilization of water and solar resources. However, the interaction of crop management and the nitrogen (N) input on the forage yields, water and N use efficiency, as well as soil N content are not well documented.MethodsA four-year field experiment was established with 0, 75, and 150 kg N ha-1 in the summer season under double-cropped and regenerated oat managements, and similar N inputs were in the previous spring season.ResultsThe double-cropped management increased forage yield and water use efficiency by 27-34% and 4-12% respectively in normal years, while it decreased total soil N content as well as nitrate and ammonium contents compared with the regenerated crop management. Low N input reduced the forage yield and soil N content in both crop managements, while it had higher N use efficiency (NUE). Applying 75 and 150 kg N ha-1 increased forage yield by 13-14% and 18-22%, respectively, whereas the former resulted in 11% higher NUE than the latter in both crop managements. Remarkably, due to the tradeoff between N yield and NUE, similar equivalent sustainable N management indexes were detected between N inputs, and their low values indicated other field managements to increase both forage yield and NUE simultaneously.ConclusionThe double-cropped management demonstrates significant potential for improving forage yields, water and N use efficiencies, necessitating further efforts to optimize sustainable N management in oat production.

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