DOI: 10.1016/j.geoderma.2020.114256
论文题名: Effects of nitrogen enrichment on soil microbial characteristics: From biomass to enzyme activities
作者: Jia X. ; Zhong Y. ; Liu J. ; Zhu G. ; Shangguan Z. ; Yan W.
刊名: Geoderma
ISSN: 167061
出版年: 2020
卷: 366 语种: 英语
英文关键词: Enzyme activities
; Microbial biomass
; Microbial community
; Nitrogen enrichment
; Soil nutrient cycling
Scopus关键词: Bacteria
; Biomass
; Carbon
; Ecosystems
; Enzyme activity
; Enzymes
; Forestry
; Fungi
; Nitrogen
; Nutrients
; Arbuscular mycorrhizal fungi
; Extracellular enzyme activity
; Microbial biomass
; Microbial communities
; Microbial community composition
; Nitrogen enrichment
; Soil nutrient cycling
; Soil physical and chemical properties
; Soils
; biomass
; biome
; community composition
; enzyme
; enzyme activity
; microbial activity
; microbial community
; nitrogen
; nutrient cycling
; soil nutrient
; Bacteria (microorganisms)
; Fungi
英文摘要: Soil microbes play an important role in ecosystem processes, including carbon (C) and nutrient cycling. Nitrogen (N) enrichment is known to affect soil microbes, but whether other factors affect the impact of N enrichment on soil microbial biomass and composition and extracellular enzyme activities (EEAs) remains unclear. In this study, to evaluate the responses of soil microbial characteristics, including microbial biomass, microbial community composition and EEAs to N enrichment, we conducted a meta-analysis using 1248 global data series from 120 published papers at 125 sites that cover five types of biomes worldwide. The results showed that N enrichment significantly decreased microbial biomass carbon (MBC) and arbuscular mycorrhizal fungi (AMF) across all studies. In addition, the responses of soil microbes depended on the N enrichment rate, and different thresholds (the N rate at which the microbial response changes) of MBC (64.85 kg N ha−1 year−1), microbial biomass nitrogen (MBN, 57.00 kg N ha−1 year−1), bacterial biomass (106.75 kg N ha−1 year−1), fungal biomass (70.50 kg N ha−1 year−1), β-N-acetyl-glucosaminidase (NAG) (83.27 kg N ha−1 year−1) and peroxidase activity (19.75 kg N ha−1 year−1) were observed under N enrichment. Moreover, the responses of soil microbes to N enrichment were affected by biome type, N enrichment rate and type, experimental duration, precipitation and soil type. Furthermore, the results showed that N enrichment significantly altered soil physical and chemical properties, which may affect soil microbial biomass and composition under N enrichment. Our findings highlight that N enrichment decreased the soil microbial biomass and showed a significant effect on soil EEAs across all terrestrial ecosystems, with more pronounced effects observed with increasing N rate and duration. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158344
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China; School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, 710072, China; Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, Shaanxi 712100, China; Ministry of Education, Key Laboratory of the Three Gorges Reservoir Region's Ecoenvironment, Chongqing University, Chongqing, 400045, China
Recommended Citation:
Jia X.,Zhong Y.,Liu J.,et al. Effects of nitrogen enrichment on soil microbial characteristics: From biomass to enzyme activities[J]. Geoderma,2020-01-01,366