Optimizing nitrogen fertilization rate to achieve high yield and high soil quality in paddy ecosystems with straw incorporation

文献类型： 外文期刊

第一作者： Zhou, Jingjie

作者： Zhou, Jingjie;Zhou, Jingjie;Zhou, Jingjie;Pan, Wankun;Tang, Sheng;Ma, Qingxu;Wu, Lianghuan;Liu, Xiu;Mi, Wenhai

作者机构：

关键词： Long-term fertilization; Soil quality; Plastic film mulching; Rice yield; Straw return

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.4； 五年影响因子：8.6 ）

ISSN： 0301-4797

年卷期： 2025 年 375 卷

页码：

收录情况： SCI

摘要： Plastic film mulching is a potentially water-saving cultivation strategy, while straw return coupled with nitrogen (N) fertilization can ensure sustainable soil productivity and increased soil organic matter (SOM) sequestration. Nevertheless, a comprehensive understanding of how soil quality and agronomic productivity respond to longterm N fertilization and straw incorporation practices under non-flooded conditions with plastic film mulching remains elusive. Herein, a 15-year field experiment with straw incorporation practices (straw return and no straw return) under various N fertilization rates (N0, N1, N2, N3, and N4: 0, 45, 90, 135, and 180 kg N ha(-1), respectively) was conducted to explore their long-term effects. Compared with N0, N fertilization significantly improved rice yield (52.2-74.0%) and plant N uptake (50.1-96.8%). Effective panicle density was the primary component affecting rice yield under different N conditions. However, N use efficiency was lowest under 180 kg N h(-1). N fertilization primarily impacted rice yield by directly supplying N for rice growth, accounting for 79% of the rice yield variation. The modest enhancement in rice yield resulting from straw return was attributed to its positive effects on soil physicochemical properties. Straw return increased alkali-hydrolyzable nitrogen, Olsen- phosphorus, and NH4OAc-exchangeable potassium by 3.4%, 10.4%, and 38.5%, respectively. N fertilization rates altered the impact of straw return on SOM; SOM increased in N2 and N4 under straw return, whereas no difference was observed between the straw management groups under N0, N1, or N3 fertilization. Moreover, while higher N fertilization rates decreased the soil quality index (SQI), straw return offset this negative effect. Considering rice yield, N use efficiency, and SQI, straw return treatment coupled with N application rate of 135 kg ha(-1) was deemed suitable for sustainable rice production with plastic film mulching.

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