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Effects of short-term N addition on soil C fluxes in alpine Sibiraea angustata scrub on the eastern margin of the Qinghai-Tibetan Plateau

文献类型：期刊论文

作者Wang, Dong1,2,3; He, Heliang1,4; Gao, Qiao1; He, Wei1; Zhao, Chunzhang1; Yin, Huajun1; Liu, Qing1
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2017-12-15
卷号247页码:151-158
ISSN号0168-1923
关键词Qinghai-Tibetan plateau Alpine scrub N deposition Soil C flux Fine root production Soil respiration
DOI10.1016/j.agrformet.2017.07.026
产权排序1
文献子类Article
英文摘要Although knowledge of the impact of N enrichment on soil C fluxes is scant, such information is highly critical for estimating the global C budget under elevated N deposition. To quantify the effects of short-term N addition on soil C sequestration in an alpine scrub ecosystem, we conducted a field experiment for Sibiraea angustata scrub on the eastern margin of the Qinghai-Tibetan Plateau in China. We quantified the soil C pool (030 cm) and C fluxes in litterfall, fine root (<2 mm diameter) production (FRP), and soil CO2 emission (heterotrophic respiration, R-h) over four years with four levels of N addition (N-0; control, N-20; 20, N-50; 50, and N-100, 100 kg N ha(-1) year(-1)). The results showed that at control plots the total C-input (433 +/- 33 g C m(-2) year(-1)) via FRP (360 +/- 34 g C m(-2) year(-1)) and litterfall (73 +/- 1 g C m(-2) year(-1)) was close to the C-output via Rh (466 +/- 5 g C m(-2) year(-1)), which demonstrates that the S. angustata scrub soil C is at equilibrium status. However, adding N, particularly the N100 treatment, significantly affected the soil C balance; the soil became a C sink (163 +/- 46 g C m(-2) year(-1)) by increasing FRP (+63%) rather than by increasing litterfall (P > 0.05) or reducing R-h (P > 0.05). As a result, the soil C pool (030 cm) increased significantly. In conclusion, these results suggest that fine roots play a dominant role in the C balance of an alpine scrub ecosystem due to large C-inputs to the soil. Moreover, short-term high N enrichment causes sequestration of additional atmospheric CO2, largely because of the stimulation of fine root growth rather than increased inputs of aboveground plant litterfall or reductions in soil CO2 emission.
学科主题Agriculture/agronomy
URL标识查看原文
WOS关键词FINE-ROOT PRODUCTION ; TERRESTRIAL ECOSYSTEMS ; NITROGEN DEPOSITION ; CARBON STORAGE ; MICROBIAL BIOMASS ; IMPACTS ; CO2 ; PRODUCTIVITY ; RESPIRATION ; DYNAMICS
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000416186700014
源URL[http://210.75.237.14/handle/351003/29890]  
专题生物多样性与生态系统服务领域_生态系统恢复与生物多样性保育四川省重点实验室
成都生物研究所_生态研究
生物多样性与生态系统服务领域_中国科学院山地生态恢复与生物资源利用重点实验室
生物多样性与生态系统服务领域_生态研究
作者单位1.Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province,Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China;
2.China West Normal Univ, Coll Environm Sci & Engn, Nanchong, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 10049, Peoples R China;
4.Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Sichuan, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Dong,He, Heliang,Gao, Qiao,et al. Effects of short-term N addition on soil C fluxes in alpine Sibiraea angustata scrub on the eastern margin of the Qinghai-Tibetan Plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2017,247:151-158.
APA Wang, Dong.,He, Heliang.,Gao, Qiao.,He, Wei.,Zhao, Chunzhang.,...&Liu, Qing.(2017).Effects of short-term N addition on soil C fluxes in alpine Sibiraea angustata scrub on the eastern margin of the Qinghai-Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,247,151-158.
MLA Wang, Dong,et al."Effects of short-term N addition on soil C fluxes in alpine Sibiraea angustata scrub on the eastern margin of the Qinghai-Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 247(2017):151-158.

入库方式： OAI收割

来源：成都生物研究所

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