NosZ clade II rather than clade I determine in situ N2O emissions with different fertilizer types under simulated climate change and its legacy. (November 2020)

• Record Type: Journal Article
• Authors: Xu, Xiaoya; Liu, Yaowei; Singh, Bhupinder Pal; Yang, Qi; Zhang, Qichun; Wang, Hailong; Xia, Zhidan; Di, Hongjie; Singh, Brajesh K.; Xu, Jianming; Li, Yong
• Is Part Of: Soil biology and biochemistry. Volume 150(2020)
• Publication Date: 2020-11
• Subjects: Climate change -- Fertilization -- Nitrous oxide -- Resilience -- Archaea -- Bacteria -- Fungi; Soil biochemistry -- Periodicals; Soil biology -- Periodicals; Sols -- Biochimie -- Périodiques; Sols -- Biologie -- Périodiques; Sols -- Microbiologie -- Périodiques; Bodembiologie; Biochemie; 631.46
• DOI: 10.1016/j.soilbio.2020.107974
• Languages: English
• ISSNs: 0038-0717

Abstract

Abstract: The feedback of greenhouse gas emissions to climate change is vital for understanding and predicting the impact of global warming on ecosystem functions. However, the legacy effect of simulated climate change on nitrous oxide (N2 O) emissions and the associated microbial guilds remain largely unknown. Using a climate change field-based mesocosm facility, we studied the impact of a warmer and drier environment and its legacy effect on in situ N2 O emissions with different fertilizer types (manure and urea). The related functional guilds including N2 O-producer [ammonia-oxidizing archaea and bacteria (AOA and AOB), nirS/K -type denitrifying bacteria, and nirK -type denitrifying fungi] and N2 O-reducer ( nosZ I and nosZ II) were analyzed by using high throughput and cloning sequencing. The simulated climate change significantly decreased in situ N2 O emissions in the fertilized soil (urea- or manure-treated) while increasing the emissions in a non-fertilized soil. The AOA and AOB were well adapted to the simulated climate change condition in the manure- and urea-treated soil, respectively. In contrast, the fungal nirK -type N2 O-producers were well adapted in non-fertilized soil. The abundance of nosZ II was significantly stimulated by simulated climate change in both fertilized and non-fertilized soils. Moreover, different fertilizer types modulated the resilience of the microbial guilds. The AOA and the nirS -type denitrifying bacteria showed strong resilience, leading to a significant increase of N2 O emissions in the manure-treated soil. The strong resilience was also observed in nosZ II clade N2 O-reducers, and the abundance of the species related to Candidatus Promineofilum breve and Gemmatirosa kalamazoonesis was stimulated by the legacy effect of simulated climate change in the urea-treated soil. The in situ N2 O emissions were negatively correlated to nosZ II rather than nosZ I. These results highlight a significant potential of nosZ II in mitigating N2 O emissions under a projected climate change, especially in agroecosystems, where a large amount of fertilizers is commonly used. Graphical abstract: Image 1 Highlights: Fertilization modulated the impact of simulated climate change on N2 O emissions. Fertilizer types modulated the resilience of the microbial guilds. The abundance of nosZ II was stimulated by the legacy effect in urea-treated soil. The in situ N2 O emissions were more correlated to nosZ II rather than nosZ I.