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Micro-nano bubbles irrigation improves rice yield under nitrogen deficiency by regulating soil microbial community

文献类型： 外文期刊

作者： Pei, Yanan 1 ; Lv, Weiguang 1 ; Xu, Chenglong 1 ; Zhu, Xianpu 1 ; Li, Shuangxi 1 ; Zhang, Juanqin 1 ; Bai, Naling 1 ; Zhang, Haiyun 1 ; Zhang, Hanlin 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Inst, Shanghai 201403, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Low Carbon Green Agr Southeastern China, Shanghai 201403, Peoples R China

3.Minist Agr, Agr Environm & Farmland Conservat Expt Stn, Shanghai 201403, Peoples R China

4.Shanghai Key Lab Hort Technol, Shanghai 201403, Peoples R China

关键词： Micro-nano bubbles irrigation; Nitrogen reduction; Bacterial and fungal community; Rice yield

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

页码：

收录情况： SCI

摘要： Nano-bubble water irrigation can increase soil oxygen content, alter soil chemical and microbial properties, and enhance crop yields. However, there is limited research about the impacts of nitrogen fertilizer reduction coupling with different micro-nano bubbles (MNBs) irrigation frequency. In this study, a two-year field experiment with three MNBs irrigation frequencies (2, 4 and 8 times/d) and two nitrogen fertilizer amounts (100 % and 70 % fertilization) was conducted in Shanghai, China. The results indicated that 1) MNBs irrigation increased rice yield by an average of 8.6 % over the two years. 2) Continuous medium and high frequency MNBs irrigation increased the soil organic matter and nitrogen contents. MNBs could effectively reduce the risk of nitrate nitrogen leaching by the inhibition to the conversion of ammonium nitrogen to nitrate nitrogen and compensate for the N deficit of 70 % fertilization treatments, enhancing their soil nutrient retention capacity. 3) The bacterial and fungal community structure were both affected by the frequency and amount of fertilization. Generally, MNBs irrigation reduced bacterial and fungal diversity, and changed microbial co-occurrence patterns, leading to a new stable microbial community. MNBs enhanced soil organic decomposition, nitrogen fixation, phosphorus cycling through the alteration of bacterial and fungal community. The responds of bacteria to MNBs were strong in a short period of time, but didn't expand to the 20-40 cm soil. The responds of fungi were tardy but significantly affected by continuous MNBs irrigation. Overall, medium MNBs irrigation frequency coupling with 70 % fertilization had the best effect on rice production systems.

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