Effect of nitrogen application rate on soil fungi community structure in a rice-fish mutualistic system
文献类型： 外文期刊
作者： Cai, Shumei 1 ; Lv, Weiguang 1 ; Zhu, Haitao 1 ; Zhang, Deshan 1 ; Fu, Zishi 1 ; Zhang, Hanlin 1 ; Xu, Sixin 1 ;
作者机构： 1.Shanghai Acad Agr Sci, Inst Ecoenvironm & Plant Protect, 1000 Jinqi Rd, Shanghai 201403, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2019 年 9 卷
页码：
收录情况： SCI
摘要： Rice-fish mutualistic production systems rationalise the use of water and soil resources in an improved approach to sustainable food production. However, drivers of fungi community structure in paddy soil, including effects of nitrogen (N) application rate, are unclear in these systems. Here, we assessed soil fungi community and soil physicochemical responses in paddy soil to contrasting rates of N application in a rice-fish system. To clarify the mutualistic effects, the rice-fish system was compared with a standard rice monoculture under a 325.5 kg ha(-1) N application rate. The results showed that N application rate affected abundance of paddy soil fungi (P < 0.05). Alpha diversity and richness of fungi were lower in the rice-fish system, but evenness increased with a decrease in N application rate, while the rate of N determined diversity of soil fungi in the rice-fish system. Dominant genera in the two systems differed, and soil physicochemical properties were more important drivers of soil fungi community structure in the rice-fish mutualistic system than in rice monoculture. Total N, available N and P regulated the abundance of dominant fungi. Our results indicate that management of soil fungi may contribute to sustainable agricultural production.
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