globalchange  > 气候减缓与适应
DOI: 10.1007/s11104-018-03912-y
WOS记录号: WOS:000462031100006
论文题名:
Soil N/P and C/P ratio regulate the responses of soil microbial community composition and enzyme activities in a long-term nitrogen loaded Chinese fir forest
作者: Shen, Fangfang1,2; Wu, Jianping3; Fan, Houbao1; Liu, Wenfei1; Guo, Xiaomin2; Duan, Honglang1; Hu, Liang1; Lei, Xueming1; Wei, Xiaohua4
通讯作者: Fan, Houbao ; Guo, Xiaomin
刊名: PLANT AND SOIL
ISSN: 0032-079X
EISSN: 1573-5036
出版年: 2019
卷: 436, 期:1-2, 页码:91-107
语种: 英语
英文关键词: Long-term nitrogen fertilization ; Soil microbial communities ; Enzyme activities ; Soil C:N:P stoichiometry ; Chinese fir plantation
WOS关键词: CARBON ; DEPOSITION ; TEMPERATE ; BIOMASS ; STOICHIOMETRY ; FERTILIZATION ; BACTERIAL ; GRASSLAND ; DEPTH ; SATURATION
WOS学科分类: Agronomy ; Plant Sciences ; Soil Science
WOS研究方向: Agriculture ; Plant Sciences
英文摘要:

AimsLong-term nitrogen (N) fertilization has been shown to profoundly affect the soil microorganisms and strongly result in several imbalances in element concentrations. The objective of this study was to examine links among the soil microorganisms, enzyme activities, and soil carbon (C), N, and phosphorus (P) stoichiometry in a subtropical Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) plantation after continuous N fertilization for 13years.MethodsThis study was performed in 25-year-old fir plantation along a fertilization gradient (0, 60, 120, and 240kgNha(-1)yr.(-1)), designated as N0, N1, N2, and N3, respectively. Soil microbial properties, including the microbial community composition, as revealed by phospholipid fatty acids (PLFAs), and soil enzyme activities (i.e., sucrase, urease and catalase) were measured, and soil elemental stoichiometry was calculated based on soil C, N, and P concentrations. A redundancy analysis (RDA) was conducted to determine the relationship between soil C:N:P stoichiometry and soil microbial properties.ResultsCompared with the control (N0), N fertilization decreased the total PLFAs (-12.20%), bacteria (-14.33%), fungi (-12.97%), and actinomycetes (-17.11%) on average. Sucrase, urease and catalase activities were enhanced by low and middle levels of N (N1 and N2), but not with high level of N (N3). Long-term N fertilization decreased soil pH, C to N ratio (C/N), and C to P ratio (C/P), while increased soil C, N and N to P ratio (N/P). The RDA identified the first two axes of soil stoichiometry variation that explained 20.4% of the variation at the soil depth of 0-20cm, 28.6% at 20-40cm and 49.9% at 40-60cm in PLFAs biomarkers and enzymes, respectively. Significant correlations between soil stoichiometry (soil N/P and C/P ratio) and soil microbial properties were found in this study.ConclusionsThese observations suggested that long-term N fertilization influenced soil microbial community composition and enzyme activities by changing the soil C/P and N/P ratios. Future studies are needed to consider the coupling relationships between soil microbial community composition, enzyme activities and elemental stoichiometry in different ecosystems under future climatic change.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/125134
Appears in Collections:气候减缓与适应

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作者单位: 1.Nanchang Inst Technol, Jiangxi Prov Key Lab Restorat Degraded Ecosyst &, Nanchang 330099, Jiangxi, Peoples R China
2.Jiangxi Agr Univ, Jiangxi Prov Key Lab Silviculture, Coll Forest, Nanchang 330045, Jiangxi, Peoples R China
3.Yunnan Univ, Lab Ecol & Evolutionary Biol, State Key Lab Conservat & Utilizat Bioresources Y, Kunming 650500, Yunnan, Peoples R China
4.Univ British Columbia Okanagan, Earth & Environm Sci Dept, Kelowna, BC V1V 1V7, Canada

Recommended Citation:
Shen, Fangfang,Wu, Jianping,Fan, Houbao,et al. Soil N/P and C/P ratio regulate the responses of soil microbial community composition and enzyme activities in a long-term nitrogen loaded Chinese fir forest[J]. PLANT AND SOIL,2019-01-01,436(1-2):91-107
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