干旱区生态环境知识资源中心(Arid): Short-term effects of nitrogen deposition on soil respiration components in two alpine coniferous forests, southeastern Tibetan Plateau

Arid

DOI	10.1007/s11676-018-0678-6
	Short-term effects of nitrogen deposition on soil respiration components in two alpine coniferous forests, southeastern Tibetan Plateau
	Wang, Jian 1; Wang, Genxu 2; Fu, Yu 3; Chen, Xiaopeng 2,4; Song, Xiaoyan 2,4
通讯作者	Wang, Genxu
来源期刊	JOURNAL OF FORESTRY RESEARCH
ISSN	1007-662X
EISSN	1993-0607
出版年	2019
卷号	30 期号:3 页码:1029-1041
英文摘要	Nitrogen (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.
英文关键词	N addition Heterotrophic soil respiration Autotrophic soil respiration Q(10) Alpine forest ecosystem
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000466148600027
WOS关键词	CO2 EFFLUX ; ENVIRONMENTAL-FACTORS ; GURBANTUNGGUT DESERT ; MICROBIAL RESPONSES ; CARBON-DIOXIDE ; FERTILIZATION ; TEMPERATURE ; ECOSYSTEM ; MEADOW ; ROOT
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217020
作者单位	1.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
推荐引用方式 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],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.