数字农科院2.0

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

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

作者机构：

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

期刊名称： Journal of Environmental Management

ISSN： 0301-4797

年卷期： 2025 年 375 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

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 long-term 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 ha−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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