数字农科院2.0

Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice Plants

文献类型： 外文期刊

作者： Xu Chunmei ; CHEN Liping ; CHEN Song ; CHU Guang ; WANG Danying *; ZHANG Xiufu *

作者机构：

关键词： Ammonium-Nitrogen Content; Nitrate-Nitrogen Content; Nitrification Activity; Nitrate Reductase Activity; Rhizosphere Oxygen Condition; Ammonia-Oxidising Bacteria Abundance; Rice; Nitrogen Use Efficiency

期刊名称： Rice Science

ISSN： 1672-6308

年卷期： 2020 年 27 卷 2 期

页码：

收录情况： JCR（2021版） ; CSCD（2020-2021年度） ; 农林核心（2020版） ; 科技核心（2020版）

摘要： Two rice cultivars (Xiushui 09 and Chunyou 84) were used to evaluate the effects of various soil oxygen (O-2) conditions on soil nitrogen (N) transformation, absorption and accumulation in rice plants. The treatments were continuous flooding (CF), continuous flooding and aeration (CFA), and alternate wetting and drying (AWD). The results showed that the AWD and CFA treatments improved soil N transformation, rice growth, and N absorption and accumulation. Soil NO3- content, nitrification activity and ammonia-oxidising bacteria abundance, leaf area, nitrate reductase activity, and N absorption and accumulation in rice all increased in both cultivars. However, soil microbial biomass carbon and pH did not significantly change during the whole period of rice growth. Correlation analysis revealed a significant positive correlation between the nitrification activity and ammonia-oxidising bacteria abundance, and both of them significantly increased as the total N accumulation in rice increased. Our results indicated that improved soil O-2 conditions led to changing soil N cycling and contributed to increases in N absorption and accumulation by rice in paddy fields.

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