Optimizing crop rotation patterns and nitrogen management to enhance yield, quality, and nitrogen use efficiency of high-quality japonica rice

文献类型： 外文期刊

第一作者： Song, Yunsheng

作者： Song, Yunsheng;Dong, Minghui;Jin, Meijuan;Gu, Junrong;Chen, Fei;Jin, Xiuliang;Hu, Yajie;Wang, Yixiao

作者机构：

关键词： Crop rotation; Nitrogen management; Yield; Rice quality; Nitrogen use efficiency

期刊名称：PADDY AND WATER ENVIRONMENT （ 影响因子：2.1； 五年影响因子：2.0 ）

ISSN： 1611-2490

年卷期： 2025 年 23 卷 3 期

页码：

收录情况： SCI

摘要： High-quality japonica rice is widely valued in Asia, particularly in China's Taihu Lake region, for its distinctive flavor and nutritional value. However, excessive nitrogen (N) fertilizer poses significant threats to both crop quality and environmental sustainability, necessitating a reconsideration of conventional agricultural practices. This study examined the integrated impacts of optimized crop rotation patterns and N fertilization strategies on yield, quality, and nitrogen use efficiency (NUE) of high-quality japonica rice. We conducted a split-plot design in the Taihu Lake region to assess the effects of rice-morel and rice-wheat rotation systems, alongside five levels of N application: the conventional rate, and reductions of 10%, 15%, 20%, and zero N. The performance of high-quality japonica rice cultivars under these conditions was analyzed. In the rice-morel rotation, reducing N by 10% consistently produced higher grain production (9.26-10.81 t ha-1) over two years, comparable to conventional N applications and superior to other reduced N treatments. This treatment also achieved the highest harvest index, ranging from 0.5320 to 0.5359. Notable enhancements were observed in processing quality (head rice yield of 70.70-72.37%), appearance quality (chalkiness degree of 1.18-1.21%), and taste quality (taste score of 72.95-72.99). N metrics, including total nitrogen accumulation (TNA, 192.23-193.53 kg ha-1), NUE (44.37-45.41%), and nitrogen partial factor productivity (NPFP, 38.91-41.28 kg kg-1), showed significant improvement. Overall, a 10% N reduction under the rice-morel rotation preserved high yields, maintained superior quality, and markedly enhanced NUE.

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