Effects of Biological Nitrification Inhibitor on Nitrous Oxide and nosZ, nirK, nirS Denitrifying Bacteria in Paddy Soils
文献类型： 外文期刊
作者： Huang, Xingchen 1 ; Zou, Yuning 1 ; Qiao, Cece 1 ; Liu, Qiumeng 1 ; Liu, Jingwen 1 ; Kang, Rui 1 ; Ren, Lantian 1 ; Wu, Wenge 2 ;
作者机构： 1.Anhui Sci & Technol Univ, Anhui Engn Res Ctr Smart Crop Planting & Proc Tech, Fengyang 233100, Peoples R China
2.Anhui Acad Agr Sci, Rice Res Inst, Hefei 230041, Peoples R China
关键词： biological nitrification inhibitor; yield quality; N2O emissions; denitrifying bacteria
期刊名称：SUSTAINABILITY （ 影响因子：3.9； 五年影响因子：4.0 ）
ISSN：
年卷期： 2023 年 15 卷 6 期
页码：
收录情况： SCI
摘要： This study aimed to investigate the effects of a biological nitrification inhibitor on nitrous oxide emission and rice yield quality in paddy soils and its effects on denitrifying the bacteria of nosZ, nirK, and nirS types. Two treatments were performed: (1) using a local conventional fertilizer as the control CK; (2) using the partial application of a conventional fertilizer + biological nitrification inhibitor as SW. N2O emission was measured using gas chromatography; qPCR amplification was performed using primers for the targeted functional genes, nosZ, nirS, and nirK, and denitrifying functional gene abundance and denitrifying microbial community structure were analyzed using fluorescence quantification and high-throughput sequencing, respectively. The results reveal that the biological nitrification inhibitor resulted in a 41.83% reduction in N2O, relative to the normal fertilizer treatment. Meanwhile, rice yield increased by 15.45% and related quality indexes were also improved. This can promote the reproduction of bacteria with the nosZ gene while inhibiting the growth of bacteria with nirS and nirK genes. The core bacteria, Nitrosospira, Rhodanobacter, Bradyrhizobium, Tardiphaga, Rhodopseudomonas, and Paracoccus, positively correlated with N2O emissions, while core bacteria Azospirillum, Burkholderia, and Mesorhizobium negatively correlated with N2O emissions. Therefore, the application of a biological nitrification inhibitor could be an effective measure to promote rice yield and quality, reduce N2O emissions, and affect key denitrifying bacteria.
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