globalchange  > 过去全球变化的重建
DOI: 10.3390/f10050369
WOS记录号: WOS:000478814700009
论文题名:
Inorganic Nitrogen Addition Affects Soil Respiration and Belowground Organic Carbon Fraction for a Pinus tabuliformis Forest
作者: Zhang, Huan1; Liu, Yanhong1; Zhou, Zhiyong1; Zhang, Yueying2
通讯作者: Liu, Yanhong
刊名: FORESTS
ISSN: 1999-4907
出版年: 2019
卷: 10, 期:5
语种: 英语
英文关键词: nitrogen addition ; soil respiration ; organic carbon fraction ; fine root biomass
WOS关键词: MICROBIAL BIOMASS ; LOESS PLATEAU ; DEPOSITION ; MATTER ; LITTER ; LABILE ; ROOT ; RESPONSES ; INPUTS ; PLANT
WOS学科分类: Forestry
WOS研究方向: Forestry
英文摘要:

The capability of forest ecosystems to sequester carbon from the atmosphere largely depends on the interaction of soil organic matter and nitrogen, and thus, this process will be greatly influenced by nitrogen deposition under the future scenario of global change. To clarify this interaction, the current study explored the variations in soil carbon fraction and soil respiration with different levels of nitrogen deposition. NH4NO3 was added at concentrations of 0, 50, 100, 200, and 400 kg N ha(-1) year(-1) separately on twenty 100 m(2) plots in a Pinus tabuliformis Carr forest in northern China. Soil samples were analyzed for their nutrient content and biophysical properties two years after nitrogen application, and the soil respiration rate was measured every month during the study period. Seasonal variation and nitrogen addition significantly affected soil respiration rate. On average, nitrogen addition significantly reduced the annual soil respiration rate by 23.74%. Fine root biomass significantly decreased by an average of 43.55% in nitrogen treatment plots compared to the control plot. However, the average proportions of autumn and winter soil respiration rates out of the annual cumulative soil respiration rate greatly increased from 23.57% and 11.04% to 25.90% and 12.18%, respectively. The soil microbial biomass carbon content in the control plot was 342.39 mg kg(-1), 23.50% higher than the average value in nitrogen treatment plots. The soil dissolved organic carbon was reduced by 22.60%, on average, following nitrogen addition. Significant correlations were detected between fine root biomass and the annual cumulative soil respiration rate, soil microbial biomass carbon content, and soil dissolved organic carbon content. This demonstrates that nitrogen addition affects soil organic carbon transformation and carbon emission, mainly by depressing fine root production.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/137251
Appears in Collections:过去全球变化的重建

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作者单位: 1.Beijing Forestry Univ, Key Lab Forest Resources & Ecosyst Proc Beijing, Beijing 100083, Peoples R China
2.Acad Inventory & Planning, Natl Forestry & Grassland Adm, Beijing 100714, Peoples R China

Recommended Citation:
Zhang, Huan,Liu, Yanhong,Zhou, Zhiyong,et al. Inorganic Nitrogen Addition Affects Soil Respiration and Belowground Organic Carbon Fraction for a Pinus tabuliformis Forest[J]. FORESTS,2019-01-01,10(5)
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