IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Short-term effects of nitrogen deposition on soil respiration components in two alpine coniferous forests, southeastern Tibetan Plateau
Wang, Jian1; Wang, Genxu2; Fu, Yu3; Chen, Xiaopeng2,4; Song, Xiaoyan2,4
Corresponding AuthorWang, Genxu(wanggx@imde.ac.cn)
2019-06-01
Source PublicationJOURNAL OF FORESTRY RESEARCH
ISSN1007-662X
Volume30Issue:3Pages:1029-1041
AbstractNitrogen (N) deposition to alpine forest ecosystems is increasing gradually, yet previous studies have seldom reported the effects of N inputs on soil CO2 flux in these ecosystems. Evaluating the effects of soil respiration on N addition is of great significance for understanding soil carbon (C) budgets along N gradients in forest ecosystems. In this study, four levels of N (0, 50, 100, 150kgN ha(-1)a(-1)) were added to soil in a Picea baifouriana and an Abies georgei natural forest on the Tibetan Plateau to investigate the effect of the N inputs on soil respiration. N addition stimulated total soil respiration (Rt) and its components including heterotrophic respiration (Rh) and autotrophic respiration (Ra); however, the promoted effects declined with an increase in N application in two coniferous forests. Soil respiration rate was a little greater in the spruce forest (1.05mol CO2 m(-2)s(-1)) than that in the fir forest (0.97mol CO2 m(-2)s(-1)). A repeated measures ANOVA indicated that N fertilization had significant effects on Rt and its components in the spruce forest and Rt in the fir forest, but had no obvious effect on Rh or Ra in the fir forest. Rt and its components had significant exponential relationships with soil temperature in both forests. N addition also increased temperature sensitivity (Q(10)) of Rt and its components in the two coniferous forests, but the promotion declined as N in put increased. Important, soil moisture had great effects on Rt and its components in the spruce forest (P<0.05), but no obvious impacts were observed in the fir forest (P>0.05). Following N fertilization, Ra was significantly and positively related to fine root biomass, while Rh was related to soil enzymatic activities in both forests. The mechanisms underlying the effect of simulated N deposition on soil respiration and its components in this study may help in forecasting C cycling in alpine forests under future levels of reactive N deposition.
KeywordN addition Heterotrophic soil respiration Autotrophic soil respiration Q(10) Alpine forest ecosystem
DOI10.1007/s11676-018-0678-6
Indexed BySCI
WOS KeywordCO2 EFFLUX ; GURBANTUNGGUT DESERT ; MICROBIAL RESPONSES ; CARBON-DIOXIDE ; FERTILIZATION ; TEMPERATURE ; ECOSYSTEM ; MEADOW ; ROOT ; EMISSIONS
Language英语
Funding ProjectChinese Academy of Sciences Key Research Project for Frontier Science[QYZDJ-SSW-DQC006] ; Strategic Priority Research Program'' of the Chinese Academy of Sciences[XDA01020304]
WOS Research AreaForestry
WOS SubjectForestry
WOS IDWOS:000466148600027
Funding OrganizationChinese Academy of Sciences Key Research Project for Frontier Science ; Strategic Priority Research Program'' of the Chinese Academy of Sciences
PublisherNORTHEAST FORESTRY UNIV
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25950
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorWang, Genxu
Affiliation1.China West Normal Univ, Land & Resource Coll, Nanchong 637002, Sichuan, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Sichuan, Peoples R China
3.China West Normal Univ, Dept Polit & Adm, Nanchong 637002, Sichuan, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jian,Wang, Genxu,Fu, Yu,et al. Short-term effects of nitrogen deposition on soil respiration components in two alpine coniferous forests, southeastern Tibetan Plateau[J]. JOURNAL OF FORESTRY RESEARCH,2019,30(3):1029-1041.
APA Wang, Jian,Wang, Genxu,Fu, Yu,Chen, Xiaopeng,&Song, Xiaoyan.(2019).Short-term effects of nitrogen deposition on soil respiration components in two alpine coniferous forests, southeastern Tibetan Plateau.JOURNAL OF FORESTRY RESEARCH,30(3),1029-1041.
MLA Wang, Jian,et al."Short-term effects of nitrogen deposition on soil respiration components in two alpine coniferous forests, southeastern Tibetan Plateau".JOURNAL OF FORESTRY RESEARCH 30.3(2019):1029-1041.
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