Metagenomic analysis insights into the influence of 3,4-dimethylpyrazole phosphate application on nitrous oxide mitigation efficiency across different climate zones in Eastern China
文献类型： 外文期刊
作者： Liu, Churong 1 ; Liu, Hongrun 1 ; Liu, Xueqing 1 ; Li, Gang 2 ; Zhang, Yushi 1 ; Zhang, Mingcai 1 ; Li, Zhaohu 1 ;
作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, State Key Lab Plant Environm Resilience, Beijing 100193, Peoples R China
2.Jilin Acad Agr Sci, Key Lab Northeast Crop Physiol Ecol & Cultivat, Minist Agr Peoples Republ China, Changchun 130033, Peoples R China
3.South China Agr Univ, Joint Inst Environm Res & Educ, Coll Nat Resources & Environm, Guangzhou 10642, Peoples R China
关键词： Nitrous oxide; Metagenome; Nitrogen cycling; Functional genes; DMPP efficiency
期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：8.3； 五年影响因子：8.2 ）
ISSN： 0013-9351
年卷期： 2023 年 236 卷
页码：
收录情况： SCI
摘要： Excessive nitrogen (N) fertilization in agroecological systems increases nitrous oxide (N2O) emissions. 3,4-dime-thylpyrazole phosphate (DMPP) is used to mitigate N2O losses. The influence of DMPP efficiency on N2O miti-gation was clearly affected by spatiotemporal heterogeneity. Using field and incubation experiments combined with metagenomic sequencing, we aimed to investigate DMPP efficiency and the underlying microbial mecha-nisms in dark-brown (Siping, SP), fluvo-aquic (Cangzhou, CZ; Xinxiang, XX), and red soil (Wenzhou, WZ) from diverse climatic zones. In the field experiments, the DMPP efficiency in N2O mitigation ranged from 51.6% to 89.9%, in the order of XX, CZ, SP, and WZ. The DMPP efficiency in the incubation experiments ranged from 58.3% to 93.9%, and the order of efficiency from the highest to lowest was the same as that of the field ex-periments. Soil organic matter, total N, pH, texture, and taxonomic and functional & alpha;-diversity were important soil environment and microbial factors for DMPP efficiency. DMPP significantly enriched ammonia-oxidizing archaea (AOA) and nitrite-oxidizing bacteria (NOB), which promoted N-cycling with low N2O emissions. Random forest (RF) and regression analyses found that an AOA (Nitrosocosmicus) and NOB (Nitrospina) demonstrated important and positive correlation with DMPP efficiency. Moreover, genes associated with carbohydrate metabolism were important for DMPP efficiency and could influenced N-cycling and DMPP metabolism. The similar DMPP effi-ciency indicated that the variation in DMPP efficiency was significantly due to soil physicochemical and mi-crobial variations. In conclusion, filling the knowledge gap regarding the response of DMPP efficiency to abiotic and biotic factors could be beneficial in DMPP applications, and in adapting more efficient strategies to improve DMPP efficiency and mitigate N2O emissions in multiple regions.
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