Substituting soybean for summer maize with optimal nitrogen fertilization enhances subsequent wheat yield and nitrogen use efficiency in semi-humid regions

文献类型： 外文期刊

第一作者： Luo, Haiqiang

作者： Luo, Haiqiang;Liu, Gaoxiang;Qi, Tianxiang;Cui, Nan;Xie, Binglin;Xiang, Yingzhou;Meruyert, Medelbek;Jia, Zhikuan;Zhang, Peng;Luo, Haiqiang;Qi, Tianxiang;Cui, Nan;Jia, Zhikuan;Zhang, Peng;Liu, Gaoxiang;Liu, Enke;Meruyert, Medelbek;Assiya, Ansabayeva;Siddique, Kadambot H. M.

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关键词： Crop rotation; Soybean inclusion; Fertilization; Yield; N utilization

期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：6.8； 五年影响因子：7.8 ）

ISSN： 0167-1987

年卷期： 2025 年 252 卷

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收录情况： SCI

摘要： Leguminous crops are beneficial for enhancing crop yields and agricultural sustainability. However, the impacts of legume crops with optimal nitrogen (N) fertilization on the subsequent crop yield and N use efficiency (NUE) are unclear. Thus, a two-year field experiment was conducted to explore the effects of three cropping systems (FW: fallow-wheat, SW: soybean-wheat, and MW: maize-wheat) and three N fertilization rates (N0: 0 kg N ha-1, N1: 125 kg N ha-1, and N2: 225 kg N ha-1) on the soil N accumulation, grain yield (GY), and N utilization during the winter wheat season in a semi-humid region. Our findings showed that the soil N accumulation, dry matter accumulation (DMA), GY, and NUE were highest for wheat under SW, where the GY and NUE for winter wheat were 19.29 % and 46.42 % higher than the average values under FW and MW, respectively (P < 0.05). In addition, the soil N accumulation and GY for winter wheat both increased significantly under FW and MW as the N fertilization rate increased (P < 0.05). However, with SW, there was no significant (P > 0.05) difference in the winter wheat GY under SWN1 compared with SWN2, but the residual soil N (NO3--N and NH4+-N) decreased by 16.59 % and NUE increased by 76.19 %. In conclusion, SW combined with reduced N fertilization in a double-cropping system can enhance the subsequent winter wheat yield and NUE in semi-humid regions by increasing the accumulation and supply of soil N.

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